Drake TECH User Manual

Technical Information Exchange

No: 062 Last updated 12/15/12 By: Mark Gilger, WB0IQK

DRAKE PARTS, MATERIALS & RESOURCES

DRAKE WEB PAGES:

DRAKE INTERNET EMAIL REFLECTOR:

The reflector is a vehicle for sending a receiving email messages to the entire Drake
group. You will start seeing email that other Drake users are sending the group. You
can submit email to the group by using the submission email address listed below. It’s a
great place to post wants and request for help.

 To Subscribe: [e-mail] - subscribe drakelist in body
 To Submit email: [e-mail]

YAHOO DRAKE RADIO GROUP:

The Yahoo group has over 800 active members. Lots of technical questions are asked
and answered dailey. http://groups.yahoo.com/group/DrakeRadio/

BLUE FILTER MATERIAL:

KG9BV – The prices are as follows for the TR-3, RV-3, TR-4 series, RV-4, TR-6, and all twins.
$8.00 first set-includes dial and meter bluing, and dial diffuser. $5.00 per set thereafter up to 99
sets $4.00 per set for orders over 100 sets. $2.00 meter strip for T-4 reciter and wattmeter of C-4
console, $1.00 for extra strips. $2.00 for extra dial and meter bluing sheets for customer wanting
darker shade. The prices for the 7-line are as follows, and include 2 dial and 2 meter bluing
pieces so customer can adjust color to own preference. Single sheet of bluing will give original
look, two sheets will be darker blue. $4.00 dial and meter bluing for TR-7. $2.00 dial bluing for
RV-7, $5.00 meter bluing for L-7. Steve Sever, 6242 E SR 244,
WALDRON IN 46182, Phone: [phone], Email:

[e-mail]

WA9TGT - “BLUE" replacement dial filters, and Windows for the "Drake
4 Line A/B/C Twins", TR3, 4, 6 and TR7 series transceivers. Web Site:

http://www.2bradioparts.com/index.html , Email:
[e-mail]

REPLACEMENT TR-4 / TR-4C / TR-6 MODE INDICATORS:
WA9TGT – Mode Indicator lights. Web Site:

http://www.2bradioparts.com/index.html , Email: [e-mail]

DIAL GLASS WINDOW “RED” ADJUST PIN:
WA9TGT – Mode Indicator lights. Fits 2A/2B/2C, R4/R4A/R4B, TR3/TR4/TR6. Web

Site: http://www.2bradioparts.com/index.html

, Email: [e-mail]

REPLACEMENT INTERCONNECTING CABLES FOR T-4X – R-4 SERIES:

Cables are used to interconnect the receiver and transmitter or
other station accessories. The cables are 36 inches long with
molded RCA style connectors on both ends. Designed for
audio, and low voltage and signal switching applications.
Cables are all new stock, available in gray or black. To order
contact RON BAKER at [e-mail].

http://www.wb4hfn.com/SALES/ForsaleHomePage.htm

REPLACEMENT INJECTION CABLE FOR T-4X – R-4 SERIES:

This cable made with all new materials, 38 inches in length, 52 ohm impedance,
low loss foam center insulation, very flexible, with RCA style tip jacks on each
end. All cables are professionally built and assembled and fully tested. To order
contact RON BAKER at [e-mail]. Web:

http://www.wb4hfn.com/SALES/ForsaleHomePage.htm

REPLACEMENT AC POWER CORDS FOR R4, R4A AND R4B:

A/C Power cord, Custom made for vintage radios. Brown or Black, Matte
finish, 8 foot length, high quality, non-polarized. Bob’s Antique Radio &
Electronics, 111 East 29th Street, LaGrange Park, IL 60525, email:

[e-mail], Web: http://www.radioantiques.com/

CABINET SCREWS:

1. WA9TGT - Phillips Head, Black Machine Cabinet Screws, 6-32

Thread / 1/4" Length, Web Site: http://www.2bradioparts.com/index.html , Email:

[e-mail]

2. McMaster-Carr Supply Company, P.O. Box 7690, Chicago, IL

60680-7690, Black Oxide Finish Pan Head Phillips, Machine Screw
18-8 Stainless Steel, 6-32 thread, ¼ inch length, (P/N 91249 A144).
Phone: [phone],

http://www.mcmaster-carr.com/

3. Allen Martin / W7APM, P.O Box 4177, Palmer, Ak. 99645. Packages of 25 at $10.00,

or packages of 50 at $20.00, price includes shipping. For more information or to place an
order by e-mail: [e-mail]

, Allen Martin / W7APM, P.O Box 4177,

Palmer, Ak. 99645

Technical Information Exchange 2 of 15

REPLACEMENT 2 & 4 LINE PANEL SPACERS:
WA9TGT - Replacement Front Panel to Sub-Panel Spacers. These spacers fit in-

between the front outer panel and inside sub-panel. They are used to maintain the
proper spacing between the front panel and sub chassis panel. Web Site:

http://www.2bradioparts.com/index.html , Email: [e-mail]

RUBBER CABINET BUMPER FEET:

1. McMaster-Carr Supply Company, P.O. Box 7690, Chicago, IL 60680-

7690, Adhesive-Backed Bumpers, (P/N 95495K121). Phone: 330-995­5500, http://www.mcmaster-carr.com/

2. WA9TGT – Stick on Bumpers + Bumpers with studs. Web Site:

http://www.2bradioparts.com/index.html , Email: [e-mail]

PANEL LAMP, #53, 14.4 Volt:

TR-7 & TR-5: Both the VFO and S-meter lamps are #53's....

1. Radio Shack Catalog No. 272-1117 (14.4 volts @ 0.12 am/bayonet base).

2. Mouser Electronics, Phone [phone], Part Number: 606-CM53

http://www.mouser.com/

3. Nationwide Radio & Eq. Sales LLC, Mark Olson "President", 1490 Norfield Rd, Suamico, Wi.

54173,

Email: [e-mail] Phone: [phone]

Web: http://marketplaceadvisor.channeladvisor.com/StoreFrontProfiles/default.aspx?sfid=86409

PANEL LAMP, #1850, 5 Volt for the L4B:

1. Mouser Electronics, Phone [phone], Part Number: 606-CM1850 http://www.mouser.com/

Nationwide Radio & Eq. Sales LLC, Mark Olson "President", 1490 Norfield Rd, Suamico, Wi.

2.

54173,

Email: [e-mail] Phone: [phone]

Web: http://marketplaceadvisor.channeladvisor.com/StoreFrontProfiles/default.aspx?sfid=86409

PANEL LAMP, #47, 6.3Volt:

1. Pinball Life, Chicago, Ill, Phone:[phone]

http://www.pinballlife.com/index.php?p=catalog&mode=search&search_in=all&search_str=47&x=83&y=15

Bob’s Antique Radio & Electronics, 111 East 29th Street, LaGrange Park, IL 60525, email:

2.

[e-mail], Web: http://www.radioantiques.com/

3. Hosfelt Electronics, 2700 Sunset Blvd, Stubenville, OH 43952-1158, Phone: 800-524-

6464. Part Number: 37-114. http://www.hosfelt.com

4. Antique electronic supply, 6221 S. Maple Ave, Tempe, AZ 85283, Phone [phone],

E-mail:

5. Mouser Electronics, Phone [phone], Part Number: 606-CM47 http://www.mouser.com/

6.

Superbrightleds.com, BA9s-W4 White LED bulb for the TR-4 Lower & Upper lamps and BA9s-B

Blue

[e-mail], Part Number: P47, http://www.tubesandmore.com

LED bulb for the dial and meter. http://www.superbrightleds.com/ [e-mail]

TR-4 RECEIVE CIRCUIT PROTECT LAMP:

(#12 Indicator Lamp, Bulb G-3 1/2, Miniature 2 Pin Base, 6.30 Volts, 0.150 Amps, 0.35 MSCP, C-6
Filament, Length 0.94 in., Dia. 0.43 in.)

donsbulbs.com , http://www.donsbulbs.com/cgi-bin/r/b.pl/12|6.3v|0.15a~usa.html

1.

2.

Light Bulb Emporium, Phone: [phone], Part# 756025,

http://www.lightbulbemporium.com/bulbrite_756025_12.asp

3. Replacementlightbulbs.com, Web: http://www.replacementlightbulbs.com/lamp12.html ,

Phone: [phone]

Technical Information Exchange 3 of 15

R-4C AUXILARY REAR CRYSTAL & FILTER COVER:

Sherwood Engineering Inc., 1268 South Ogden Street Denver, Colorado 80210 USA

e-mail: [e-mail] Phone: [phone] FAX: [phone] Web:

http://www.sherweng.com/

R4C & TR4C NOISE BLANKER DUMMY PLUG:

WA9TGT - Dummy Plug Must Be Used In The R-4C Receiver and TR-4C Noise
Blanker Socket When The Optional 4-NB or 34-PNP Noise Blanker Is Not Installed.
Web Site: http://www.2bradioparts.com/index.html , Email:

[e-mail]

DRAKE ‘C’ & TR-7 PTO Rubber Sleeve:

WA9TGT - “Replacement Rubber Sleeve” This
rubber sleeve slips over the C-Line PTO shaft
located behind the main tuning knob and dial
skirt. The old rubber sleeves often become hard
and non-pliable.

Web Site: http://www.2bradioparts.com/index.html , Email: [e-mail]

DRAKE SERVICE CD’S :

Service Parts Locator for Drake 2B, 2-C/2-NT, B-Line, C-Line, TR­4, and TR-4C. Each radio comes on it’s own CD. The B-Line is
$19, the 2 and 4 Lines are $25 each, and the TR-4’s are $35 each.
Go to Garey’s web site for more detail. Garey Barrell, K4OAH,
10912 Virginia Forest Ct, Glen Allen, VA 23060-6503. e-mail:

[e-mail] , Web: http://www.k4oah.com/

B-LINE CHROME CENTER REPLACEMENT FOR TUNING KNOB:

1. Spun aluminum inserts for the Drake "B" Line

radios and TR4 transceiver. Listed below are a
series of pictures of the new inserts and the last
picture shows you how their installed. To make a
purchase or for further information please e-mail
at the link listed above or call me at 630-879-

1132. Alan / KC9YS

2. Inlays for Drake B-Line are $3.00 each. Charlie Talbott, 13192 Pinnacle

Lane, Leesburg, VA 20176-6146 Phone: [phone] Email: [e-mail]

C & 7 LINE SPUN ALUMINUM CENTER INSERTS FOR MAIN TUNING KNOB:

I have a large quantity of spun aluminum inserts with clear epoxy coating available to
fit several different radios. I have all of the various sizes to fit the Collins S-Line as
well as the main tuning sizes for the Drake C-Line and Heath S-B Series. They are all
new production and are in perfect condition, individually wrapped for shipment. I
have shipped many of them and everyone is very happy with their appearance and
ease of installation. For the Drake C-Line main tuning are $3.00 each. Charlie Talbott,
13192 Pinnacle Lane, Leesburg, VA 20176-6146 Phone: [phone] Email:

Technical Information Exchange 4 of 15

[e-mail]

KNOBS:

Alan / KC9YS, New Drake pointer knobs (with the set screw), individually for $4 each or a set
of 9 knobs including a new preselector knob for $35. As you know, you can use
these knobs on the plate and tune controls where there used to be a spring. The
setscrew allows you to set the knob just slightly away from the panel to prevent paint
damage. TR-4 & ‘B’ line main tuning knob $20. These are New stock, not NOS. To
make a purchase or for further information please e-mail at the link listed above or call me at
630-879-1132. Alan / KC9YS Email: [e-mail]

KNOBS:

Fred Freeman / N8BX, The original Drake R-4 and TR-7 Plastic knobs weigh in
around 1 ounce.. These premium USA made knobs weigh 8 ounces and they tune
just wonderful. A spinner makes for fast and easy QSY. It actually makes frequent
band changes pleasant and you soon forget how long it takes going from each end of
the VFO. This knob is for the ham that uses his radios daily and wants a beautiful

weighted knob with a luxurious feel. Installation is easy and all hardware is
Stainless Steel. Everything is CNC Machined from billet stock right here in
the USA. The set screw that holds the knob in place is a flat tip style (no
marring of your VFO shaft) and the spinner is long lasting Delrin. These
knobs are first class all the way. I am so sure you will be pleased I will
100% guarantee your satisfaction for 30 days or you may return it for a full
refund. P.O. Box 249, Caledonia, OH 43314 Phone: [phone] Email:

[e-mail]

Web: http://www.73cnc.com/

Nationwide Radio & Eq. Sales LLC, Mark Olson "President", 1490 Norfield Rd, Suamico, Wi. 54173,

Email: [e-mail] Phone: [phone]

Web: http://marketplaceadvisor.channeladvisor.com/StoreFrontProfiles/default.aspx?sfid=86409
Caltronics, 335 Maple Ave., Torrance, CA 90503, Phone: [phone] or [phone],

Fax: [phone] or [phone] http://www.caltronix.com/

• Drake "Bar Knob" that fits all the A, B and C Line radios p/n 50-133 is 0.938" in

diameter with a 0.250" dia shaft.

• Smaller knob that goes on the SPR-4, p/n 50-132 is 0.750" dia with a 0.250" shaft.

Their p/n 50-1418 is a 0.250" to 0.125" "Shaft Reducer" insert.

• Main Tuning Knob." Best description is that it is a C Line knob but without the

spinner button. Their p/n 50-261 is a 1.750" dia / 0.250" shaft "

• The "BAR" Bandswitch knob (p/n 50-161) and the large tuning knobs (p/n 50-

133) for the MN-2000. The tuning knobs do have a white indicator stripe on
the top of the knob as well as on the skirt, but other than that they are identical.

TR-4C SSB FILTERS:

Replacement SSB filters can be obtained from International Crystal (INRAD), 13620 Tyee Road,
Umpqua, OR 97486, P/N #1902 (Lower Sideband), #1992 (Upper Sideband), phone#: [phone],

http://www.coulee.com/inrad/index.htm, email: [e-mail]. An article covering SSB filter

Web:
replacement was written by: WA8SAJ, and are located at:

Technical Information Exchange 5 of 15

http://www.wb4hfn.com

R-4C FILTERS: ( CW, SSB, & AM )

1. Sherwood Engineering Inc., 1268 South Ogden Street Denver, Colorado 80210 USA

e-mail:

[e-mail] Phone: [phone] FAX: [phone] Web:

http://www.sherweng.com/

2. INTERNATIONAL RADIO (INRAD), 13620 Tyee Road, Umpqua, OR 97486, Phone: [phone],

Web: http://www.inrad.net/home.php

, email: [e-mail] Web: http://www.coulee.com/inrad/

TR-4C AM EXPERIMENTAL FILTERS:

AM 9 mhz. filters Part # 1906 can be obtained from International Crystal (INRAD), 13620 Tyee
Road, Umpqua, OR 97486 phone#: [phone], Web: http://www.inrad.net/home.php ,
email: [e-mail]. An article covering AM filter replacement was written by WA8SAJ, and
are located at: http://www.wb4hfn.com See Jeff Covelli’ article in Electric Radio #147.

DO-IT-YOURSELF CABINET RE-PAINTING:

1. Krylon Semi Flat Black # 1613 is an identical match. It can be located at Wal-Mart, K-Mart, and

many hardware stores. Procedures for painting cabinets is located at:

2. Rust-Oleum

speaker grills.

High Performance Enamel Dark Machine Gray #7587 is an identical match for MS-4

http://www.wb4hfn.com

3. NC Total Electronics, Telephone: [phone], Email: [e-mail], Web:

http://www.nctotalelectronics.com/

CABINET RE-PAINTING:

HARTZELL Manufacturing Company, 2533 Technical Drive, PO Box 808, Miamisburg, OH 45343,
Phone Number: 937-859-5955. They were the original equipment painters for all Drake cabinets. They
charge $45 per piece. Example: TR-4 would be 2 pieces, MS-4 would be 1 piece.

CINCH JONES CONNECTORS AC4 & AC3 (12 PIN MOLEX Part# S-3312-CCT):

1. Mouser Electronics, Phone [phone], E-mail: [e-mail],

Part Number: 538-38331-8012

, Web: http://www.mouser.com/

2. Newark InOne, 4801 N. Ravenswood, Chicago, Illinois 60640, Phone: 773-

784-5100, Part Number: #14F2451 . Web: http://www.newark.com/

3. Digikey, 701 Brooks Ave. South, PO Box 677, Thief River Falls, MN 56701-

0677, Phone: [phone], Part# CJ112S-ND , Web: www.digikey.com

4. Atex Electronics, Part Number S-312-CCT-P

[e-mail]

Web: http://www.atexelectronics.com/connectors/jonesconn.htm

: Call, Phone: [phone] Email:

CINCH JONES CONNECTOR TR7 - PS7 PWR(4 PIN MOLEX Part# S-5404--CCT):

1. Mouser Electronics, Phone [phone], E-mail: [e-mail],

Part Number:538-38541-8404

, Web: http://www.mouser.com/

CINCH JONES CONNECTOR TR7 - PS7 PWR (10 PIN CINCH-JONES Part# S-310-CCT):

1. Newark InOne, 4801 N. Ravenswood, Chicago, Illinois 60640, Phone: 773-

784-5100, Part Number: #29F864 . Web: http://www.newark.com/

2. Digikey, 701 Brooks Ave. South, PO Box 677, Thief River Falls, MN 56701-

0677, Phone: [phone], Part# CJ110S-ND , Web: www.digikey.com

CINCH JONES CONNECTOR TR7 - RV-7 (8 PIN MOLEX Part# P-3308-CCT):

1. Mouser Electronics, Phone [phone], E-mail:

Number:538-38331-5608, Web: http://www.mouser.com/

[e-mail], Part

2. Digikey, 701 Brooks Ave. South, PO Box 677, Thief River Falls, MN 56701-

0677, Phone: [phone], Part# CJ108P-ND , Web: www.digikey.com

Technical Information Exchange 6 of 15

CINCH JONES CONNECTOR DC3, DC4 & C4 (10 PIN MOLEX Part# S-3310-CCT):

1. Newark InOne, 4801 N. Ravenswood, Chicago, Illinois 60640, Phone: 773-

784-5100, Part Number: #14F2450 . Web: http://www.newark.com/

2. Digikey, 701 Brooks Ave. South, PO Box 677, Thief River Falls, MN 56701-

0677, Phone: [phone], Part# CJ110S-ND , Web: www.digikey.com

CINCH JONES CONNECTOR TR7 ASSESSORY (12 PIN MOLEX Part# P-3312-CCT):

1. Mouser Electronics, Phone [phone], E-mail: [e-mail],

Part Number:538-38331-5612, Web: http://www.mouser.com/

2. Digikey, 701 Brooks Ave. South, PO Box 677, Thief River Falls, MN 56701-

0677, Phone: [phone], Part# CJ112P-ND , Web: www.digikey.com

3. Atex Electronics, Part Number: P-312-CCT-P Call, Phone: [phone]

Email:

[e-mail] Web: http://www.atexelectronics.com/connectors/jonesconn.htm

MICROPHONE PLUGS, .206 INCH, STRAIT: (Switchcraft S-260)

1. Mouser Electronics, Phone [phone], E-mail: [e-mail],

Part Number:502-S260, Web: http://www.mouser.com/

2. Newark InOne, 4801 N. Ravenswood, Chicago, Illinois 60640, Phone: [phone],

Part Number: 98F7746. Web: http://www.newark.com/

MICROPHONE PLUGS, .206 INCH, RIGHT ANGLE: (Switchcraft S-230)

1. ONLINECOMPONENT.COM, Part Number: S230,

http://www.onlinecomponents.com

2. Mouser Electronics, Phone [phone], E-mail: [e-mail],

Part Number: 502-S230, Web: http://www.mouser.com/

3. Nationwide Radio & Eq. Sales LLC, Mark Olson "President", 1490 Norfield Rd, Suamico, Wi.

54173,

Email: [e-mail] Phone: [phone]

Web: http://marketplaceadvisor.channeladvisor.com/StoreFrontProfiles/default.aspx?sfid=86409

TR4C ANTENNA RELAY (AMF/POTTER & BRUMFIELD #R10-E1Y4-V2.5K):

1. Mouser Electronics, Part Number 655-R10-E1Y4-V2.5K, Phone [phone],

http://www.mouser.com/

2. DIGI-KEY CORP. 701 Brooks Ave. South, Thief River Falls, MN 56701-0677,

Phone Number: 800-344-4539, Digi-Key P/N : PB123-ND. Web:

key.com

BURNISHING TOOL

1. Mike Sandman, Chicago’s Telecom Expert, 390 E. Irving Park Rd.,

Roselle, IL 60172 Phone: [phone]. Web:

http://www.sandman.com/ Order Model T001E for $18.95

2.

Neuses Tools, 1401 Rohlwing Rd., Rolling Meadows, IL 60008.

Phone: [phone], Fax: [phone]. Web:

http://www.pkneuses.com/www.pkneuses.com/index.html

(No.266B) .007" (.178mm) thick blades. (Included in the TK-18 Tool Kit. CB-54 Same as CB-5
except has 6 (No. 466B) .0035" (.089 mm) thick blades. CB-6 Same as CB-54 except also
contains 6 (No. 266C) round ended abrasive rods. CB-7 Same as CB-5 except has 6 (No. 566B)
smooth satin finished blades )

(Used to clean relay contacts):

(CB-5 Contact Burnisher with 6

http://www.digi-

Technical Information Exchange 7 of 15

CONTACT CLEANER (DEOXIT D5):

1. Antique electronic supply, 6221 S. Maple Ave, Tempe, AZ 85283,

Phone [phone], E-mail: [e-mail], Part Number: S­CD5S-6, http://www.tubesandmore.com

2. Sherwood Engineering Inc., http://www.sherweng.com/ham.html

3. CAIG Laboratories, Inc., 12200 Thatcher Court, Poway, CA 92064,

No. DN5S-6N, or the needle dispenser D100L Part No. D100L-25C

Phone: 800-

Part

224-412, Email: [e-mail], Web: http://www.caig.com/

AC4, AC3, R4 FILTER CAPACITORS:

Antique electronic supply, 6221 S. Maple Ave, Tempe, AZ 85283, Phone 800-706­6789, E-mail: [e-mail], http://www.tubesandmore.com

HAYSEED HAMFEST CO. - e-mail:

[e-mail] Web:

http://www.hayseedhamfest.com/

AC4, AC3, POWER SUPPLY FILTER REPLACEMENT BOARD:

Mike Bryce , of the “TheHeathKitShop” makes a universal
replacement kits for the AC-4 and AC-3. The Part number is: AC4r. You
can obtain just the board if desired.

http://www.theheathkitshop.com

Phone: [phone] Web:

R-4C FILTER CAPACITORS:

Sherwood Engineering Inc, 1268 South Ogden Street Denver, Colorado 80210

USA, Part No.: FC-4 Filter Capacitor Replacement Kit, e-mail: [e-mail]
2257 FAX: [phone]

Phone: 303-722-

HAYSEED HAMFEST CO. - e-mail: [e-mail] Web: http://www.hayseedhamfest.com/

R-4A & R-4B FILTER CAPACITORS:

WA9TGT - R4A & R4B Re-cap kits, Web Site: http://www.2bradioparts.com/index.html ,
Email: [e-mail]

HAYSEED HAMFEST CO. - e-mail: [e-mail] Web: http://www.hayseedhamfest.com/

ELECTROLYTIC CAN CAPACITORS for 2B, 2C, R4 series, T4 series, TR-4 series:

HAYSEED HAMFEST CO. - Fredericksburg, Iowa Hayseed Hamfest is your supplier of
metal can-type and tubular electrolytic capacitors.

e-mail: [e-mail]

Web: http://www.hayseedhamfest.com/

WA9TGT - These 4-section replacement filter capacitor module fits in place of the
original 4-section filter capacitor can. Fits R4, R4A, R4B, 2A, 2B Receivers . Web
Site: http://www.2bradioparts.com/index.html

R4A PAPER FOIL CAPACITOR RE-CAP KIT:

, Email: [e-mail]

WA9TGT - All the needed values are in this R4A Re-cap kit. All capacitors meet or
exceed the original voltage rating used in the Drake R4A receiver.Web Site:

http://www.2bradioparts.com/index.html

, Email: [e-mail]

Technical Information Exchange 8 of 15

PASSBAND TUNING KNOB SHAFT REDUCER:

WA9TGT - Fits all Drake 2-A / 2-B / -2C / R-4 / R-4A / R-4B Series
Receivers PBT KnobsWeb Site: http://www.2bradioparts.com/index.html ,
Email: [e-mail]

R4A, R4B, SW-4A, 2C AUDIO GAIN CONTROL:

WA9TGT - This is an American made 3K replacement AF gain control with
the correct audio taper.. They are NOS and were originally designed for the
Drake 2-C Receiver, however they also work fine in the R-4A (11 tube
chassis), the R4B and the SW-4A Web Site:

http://www.2bradioparts.com/index.html , Email: [e-mail]

2A, 2B, R4 500K AF GAIN CONTROL:

WA9TGT - These 500K AF gain controls are (New Old Stock) and they are the
originals used on the Drake 2A/2B receivers. This same AF gain control is also
used in the Drake R4 receiver and also in the 13 tube version of the R4A
receiver. Web Site: http://www.2bradioparts.com/index.html , Email:

[e-mail]

2A, 2B Dial Strings:

WA9TGT - Dial Strings are .028” OD, pre-cut for correct installation fit.
Web Site: http://www.2bradioparts.com/index.html , Email:

[e-mail]

PLATE & LOAD CONTRAOL SHAFT COUPLERS:

WA9TGT - These couplers will replace the old compression style shaft
couplers used in the T-4XB / C Transmitters as well as the couplers used in the
late version TR-4 / TR-4C series transceivers.Web Site:

http://www.2bradioparts.com/index.html , Email: [e-mail]

2B CAPACITOR RE-CAP KIT:

WA9TGT - All the needed values are in this 6 piece 2B Re-cap kit. All capacitors
meet or exceed the original voltage rating used in the world famous Drake 2B
Receiver. Web Site: http://www.2bradioparts.com/index.html , Email:

[e-mail]

CRYSTAL CALIBRATOR:

“HeathKitShop” makes a universal calibrator kit that will work with any receiver,
including the 2A, 2B, 2C, R4B, etc., receiver. It’s a 100khz and 25 khz and you
can pulse the marker on and off to find it on a busy band. Web:

http://www.theheathkitshop.com

Technical Information Exchange 9 of 15

WA9TGT - (Direct Plug-In) "Crystal Calibrator" For The "DRAKE" 2A / 2B / 2C
Receivers. Completely Assembled and Pre-Tested. Uses a 6CB6 Tube (Included).
Web Site: http://www.2bradioparts.com/index.html , Email:

[e-mail]

L4 / L4B SOFT-KEY PCB KIT:

Harbach Electronics, Jeff Weinberg - W8CQ, Phone: [phone], email:

[e-mail]

, Web: http://www.HARBACHELECTRONICS.COM/ The

SK-401 is an interface module which allows your transceiver to key the Drake L­4 or L-4B seeing only 0.7 volts at 1.5 mA. The original Drake L-4/L-4B circuit had +24 volts on
the keying line, but this can still cause damage to modern rigs. This unit installs easily in the RF
deck.

AMPLIFIER INTERFACE UKA-2 :

HamGadgets.com, Dale Botkin, 16624 Elm St., Omaha, NE 68130-1826

http://www.hamgadgets.com/

keyed rig transmitter, transceiver or amplifier. This totally silent solid state relay is rated for a
whopping 400V DC, at 400 mA! Use it to key your tube amp from a solid state rig, or keep that
high voltage off your straight key - no more getting zapped when you accidentally touch the wrong
part of the key!

Use this to key nearly any solid state, grid-block or even cathode

L4 / L4B PILOT LIGHTS:

1. Allied Electronics, 7151 Jack Newell Blvd. S., Fort Worth, Texas 76118 U.S.A., Web:

http://www.alliedelec.com/ , Allied #679-5105 = 'Red', #679-5115 = 'Amber'.

2. Mouser Electronics, Part No. 607‐1050‐C1fortheRedwith6”blackleadsandthe

Ambercoloris607‐1050‐C3isthe

'Amber., Phone [phone], http://www.mouser.com/

3. Nationwide Radio & Eq. Sales LLC, Mark Olson "President", 1490 Norfield Rd,

Suamico, Wi. 54173,

Email: [e-mail] Phone: [phone]

Web: http://marketplaceadvisor.channeladvisor.com/StoreFrontProfiles/default.aspx?sfid=86409
L4 / L7 AMPLIFIER CAPACITORS: ( 200 mfd @ 450 VDC )

Axial leads are impossible to find as direct replacements. You will need to get the snap
mount variety, or screw lug type and solder appropriated leads to match installation.

1. Harbach Electronics, Jeff Weinberg - W8CQ, Phone: [phone], Par No.:

CP-210 SET OF 8 MATCHED 210mF 450VDC COMPUTER GRADE email:

[e-mail]

, Web: http://www.HARBACHELECTRONICS.COM/

2. Mouser Electronics, Part# 75-TVA1720 (200uf), Part# 598-420C221M450AK8 (220uf), Phone

800-346-6873,

http://www.mouser.com/

3. Newark Electronics, Part# 18F2912 (200uf) Part# 01M7652 (220uf), Part# 52R2409 (220UF), ,

Phone [phone]

, http://www.mouser.com/

L75 AMPLIFIER CAPACITORS: ( 100 mfd @ 450 VDC )

1. Radio Daze, Part# C-EA100-450, Phone [phone].,

http://www.radiodaze.com/

2. Newark Electronics, Part# 30K6603 (100uf) Part# 79K3635 (100uf), Part# 65K2282 (100UF), ,

Phone [phone]

3. Mouser Electronics, Part# 75-TVA1718-E3 (100uf), Part# 140-XAL450100-RC (100uf), Part#598-

SKA101m450 (100uf), Phone [phone], http://www.mouser.com/

, http://www.mouser.com/

Technical Information Exchange 10 of 15

L4 / L7 HIGH VOLTAGE REPLACEMENT POWER SUPPLY PCB :

1. Mike Bryce , of the “HeathKitShop” makes a universal replacement power supply kits

for the L4 & L7. You can obtain just the board if desired FOR $25, or the full kit for
$100, part number L7R.

2. Harbach Electronics
PM-400 L-4/B/7 POWER SUPPLY $95. email: [e-mail]
Web: http://www.HARBACHELECTRONICS.COM/

Phone: [phone] Web: http://www.theheathkitshop.com

, Jeff Weinberg - W8CQ, Phone: [phone], Par No.:

,

L4 / L4B SOFT-START PCB KIT:

Harbach Electronics, Jeff Weinberg - W8CQ, Phone: [phone], email:

[e-mail], Web: http://www.HARBACHELECTRONICS.COM/

The SS-400 limits inrush current during amplifier start-up by placing a small
resistive load in series with the AC mains. The load is switched out of the
circuit by the relay a few milliseconds later. The soft-start mounts on the
underside of the RF deck and safely limits inrush current to protect the hard
to find and costly-to-replace ON-OFF switch, tubes, filter capacitors and high voltage
transformers.

L4 / L4B / L7 HV SAFETY RESISTOR:

Harbach Electronics, Jeff Weinberg - W8CQ, Phone: [phone], email:

[e-mail], Web: http://www.HARBACHELECTRONICS.COM/

The RES-400 is a direct replacement for the original IRC SPH-style safety
resistors used in the L-4/L-4B/L-7 remote power supply. These resistors are
designed to open under conditions of high plate current draw from the power
supply (tube arch or power supply short) to protect expense tubes and power
supply components.

L4 / L4B / L7 REPLACEMENT 50k 50 W BIAS RESISTOR:

Harbach Electronics, Jeff Weinberg - W8CQ, Phone: [phone], email:

[e-mail], Web:
http://www.HARBACHELECTRONICS.COM/

The RES-402 is a direct

replacement for the 50KOhm 50 W bias resistor used in the Drake L­4/L-4B/L-7 remote power supply.

L4 / L4B / L7 T/R RELAY:

Harbach Electronics, Jeff Weinberg - W8CQ, Phone: [phone], email:

[e-mail]
http://www.HARBACHELECTRONICS.COM/

, Web:

The RY-L4B is a direct

replacement T/R relay for the Drake L-4/L-4B. It is a 3PDT relay with a
24VDC coil.

L4 - 3-500z GLASS CHIMNEYS & CHIMNEY CLIPS:

1. RF Parts, 435 So. Pacific Street , San Marcos, CA 92069 Part No. 5X406, and Part # 275-CLIP,
[phone], Technical Help: [phone], Web: http://www.rfparts.com/

2. Colman, You can also use Colman’s lantern globes for their propane gas lanterns, part

number R214D046C. If shopping at your local sports store, the box has a UPC number of
20071213 and on the globe itself is No. 277C043 3009. Web:
http://www.coleman.com/coleman/parts/Productimage2.asp?product_id=globe Phone:

800-835-3278, Email:

[e-mail].

Technical Information Exchange 11 of 15

R4B CRYSTAL CALIBRATOR:

Semi Conductor Museum http://www.transistormuseum.com sells the IC1
and IC2 UL923 IC’s that are used on the Crystal Calibrator pcb. Email,
[e-mail] to determine payments options (Paypal or Check)

http://semiconductormuseum.com/MuseumStore/MuseumStore_Fairchild_923_Index.htm

R4C IMPROVEMENTS:

Sherwood Engineering Inc., 1268 South Ogden Street Denver, Colorado
80210 USA, e-mail: [e-mail] Phone: [phone]
FAX: [phone] Web: http://www.sherweng.com/ham.html
First IF Crystal Filters

1. Filter brackets, Crystal and Mode Switch cover plates.

2. PRE-4 Preamp,

3. R-4C Filter Capacitor Replacement Kit

4. R-4C Audio Amplifier

5. R-4C Sold State 3rd Mixer.

6. R-4C Product Detector

7. R-4C New Replacement Power Supply Board

CRYSTALS:

1. International Crystal Manufacturing Co. Inc., Phone: [phone], Web:

http://www.icmfg.com, http://www.icmfg.com/hamradio-manufacturers.html , email:
[e-mail]

2. JAN Crystals, 2341 Crystal Drive, P.O. Box 60017, Fort Myers, Fl. 33906-6017, Phone:
800-526-9825, Fax: [phone], Email: [e-mail] Web:

http://www.jancrystals.com/ .

3. Sherwood Engineering Inc., 1268 South Ogden Street Denver, Colorado 80210 USA
e-mail: [e-mail] Phone: [phone] FAX: [phone].

http://www.sherweng.com/ham.html Sells crystals for the R4 series only.

4. M&H Electronics, 9569 9th Street, Rancho Cucamonga, CA 91730 [phone], Fax
[phone] Web: http://www.mhelectronics.com/

5. WA9TGT, 2A/2B/2C Band Crystals, Web Site:

http://www.2bradioparts.com/index.html , Email: [e-mail]

6. QuartSLab,

Email: [e-mail] , Web Site: http://www.quartslab.com/

DRAKE 9.000mhz CRYSTAL SPECIFICATIONS:

+/- 0.003% Freq. tol., Parallel Resonant, 20pf load cap., HC-32/U wire leads, Hermetic seal

METER REPAIR:

Meters for Drake equipment are no longer available. The following sources will repair meters.

Standard Meter Labs Charles Jobes Industrial Instrument Works Larson Metercraft, Inc.
Phone [phone] Phone [phone] Phone: [phone]A Wheatlands Road
236 Rickenbacker Circle 125 Denmar Lane 5745 Salmen Ave. Santee CA 92071

Livermore CA 94550 Hendersonville NC 28791 New Orleans, LA 7012

3 619-258-8990

http://www.larsonmetercraft.com

Technical Information Exchange 12 of 15

TUBES:

1. ESRC Vacuum Tubes, Phone: [phone], Email: [e-mail] Web:

http://esrcvacuumtubes.com/

2. John Walker JR., 13406 W. 128TH Terr., Overland Park, KS. 66213, PH: 913-782-

6455 (Home Evenings) PH: 913-568-7057 (Cell), Email: [e-mail]

3. TTC The Tube Center, Orlando, Fl 32809 Phone: [phone], Email:

[e-mail]

4. Radio Electric Supply

, 3500 N.W. 97th BLVD. Suite R, Gainesville, FL 32606, Phone:

Web: http://www.thetubecenter.com/index.html

352-332-8881, Email: [e-mail] Web: http://www.vacuumtubes.net/

5. Vacuum Tubes, Inc.,

[e-mail]

6. SND Tube Sales

[e-mail] Web: http://www.vacuumtubes.com/

Phone: [phone] Web: http://www.vacuumtubesinc.com/ email,

, Phone [phone], Fax [phone], E-mail:

7. The Tubestore.com, Phone: [phone], Web:

http://www.thetubestore.com/thetubestore/index.html

8. Antique electronic supply

http://www.tubesandmore.com

9. Nationwide Radio & Eq. Sales LLC,

, Phone [phone], E-mail: [e-mail], Web:

Email: [e-mail] Phone: [phone]

Web: http://marketplaceadvisor.channeladvisor.com/StoreFrontProfiles/default.aspx?sfid=86409

W4 WATTMETER CONVERTION TO A PEAK READING METER:

HI-RES Communications offers the famous PDC-1 kit to convert ANY Average Reading wattmeter to true Peak
Reading! Other kits will join the PDC-1 in our kit line soon! HI-RES Communications, Inc., 8232 Woodview Dr.,
Clarkston, MI 48348-4058 USA , E-mail orders: [e-mail]

http://home.att.net/~hi-res/

, Phone: [phone] Web:

TR-7 ANTENNA RELAY :

1. Mouser Electronics, Part Number 655-R10-E1Y4-V18S, Phone 800-
346-6873, http://www.mouser.com/

2. DIGI-KEY CORP. 701 Brooks Ave. South, Thief River Falls, MN
56701-0677, Phone Number: 800-344-4539, Digi-Key P/N :PB121-ND.
Web:http://www.digi-key.com

TR-7 PIN DIODES (MPN3404 & (UM9401 OR MA4P 1200 ):

1. RF Parts, 435 So. Pacific St., San Marcos, CA 92069,

http://www.rfparts.com/index.html

Phone: [phone].

2. Down East Microwave Inc., 954 Route 519 Frenchtown, NJ 08825,

http://www.downeastmicrowave.com/ Phone: [phone]

TR-7, TR-5 & Replacement Plastic Side Panels:

Replacement re-manufactured plastic side panels can occasionally be obtained from
John Kriner, 927 Lamberton St. Middletown, OH 45044. Email:

http://www.siscom.net/~jandsuz/index1.htm

[e-mail] Web:

TR-7 SERVICE KIT EXTENDER CARDS:

Service Kit for the DRAKE TR-7 series. The kits includes the 13 board extenders cards
and a DIGITAL JUMPER card required to do any real service work on these fine radios.

Bob W7AVK
http://pweb.amerion.com/~w7avk/

by phone at [509] 766-7277 or check out

for additional details.

Technical Information Exchange 13 of 15

TR-7 RF TRANSISTORS :

RF transmitter power transistors, from:

RF Parts

www.rfparts.com

, 435 South Pacific Street, San Marcos, CA 92069, Phone: [phone], web:

Communication Concepts, Inc., 508 Millstone Dr., Beavercreek, Oh., 45434-5840 Telephone: 937-
426-8600, Fax: [phone]

web: http://www.communication-concepts.com/default.htm

MRF421MP TR7(A) final output transistors, the MP on the end of the part number means "Match Pair".
MRF455MP
2SC2879
MRF475MP

TR5 final transistors

TR7(A) final transistors, but not available in matched pairs.

TR7(A) amplifier driver transistors.

ASTATIC D-104 MICROPHONE CRYSTAL CARTRIDGES:

Mouser Electronics, Phone [phone], E-mail: [e-mail],

Part Number:

#25LM022, Web: http://www.mouser.com/

TR7 / R-7 REPLACEMENT DISPLAY:

For orders in the US and Canada contact,
Jim Pruitt - WA7DUY, 1916 Tolman Rd , Ellensburg, WA 98926., USA.
E-mail: [e-mail]
Richard-Strauss-Str. 56, D-91315 Hoechstadt, Germany. Phone: [phone], E­mail: [e-mail]

. to: http://www.df4nw.de, Willi Rass,

TR7 to R-7 Transceiver Cable:

Cables are made with all new materials, 12 pin connectors, separate cabling for
the control functions and RF signals, shrink wrap on the cable ends to protect
and hold the cables securely to the connectors. These cables are professionally
built and assembled and fully tested and perform identically to the Drake
original. To order contact RON BAKER at [e-mail]. Web:

http://www.wb4hfn.com/SALES/ForsaleHomePage.htm

TR7 & TR5 Power Cable:

Power your Drake TR-7(A) Transceiver from any compatible power supply. This cable includes
4 prong power connector and 4 feet of red/black #10 size cable with connectors to accommodate
up to 1/4" bolt. To order contact RON BAKER at [e-mail].

http://www.wb4hfn.com/SALES/ForsaleHomePage.htm

TR-7, SP-7, L-7 PLASTIC END CAPS:

These are direct replacements for the plastic end caps that are located
on both the right and left side of the front panels. Michael March,
K4QU, 242 Clay Hill Dr., Winchester, VA 22602, [e-mail]

[e-mail]

, Phone: [phone]

,

Technical Information Exchange 14 of 15

TR7 Pre-Amplifier:

http://www.df4nw.de/44.html

A simple Pre-Amplifier for the TR-7 to improve
receiver sensitivity on the higher short wave bands.
Gain: ~ 15 db, Frequency range: 1 to 30 MHz, Size
(HWL): 14x48x58 mm

For orders in the US and Canada contact, Jim Pruitt ­WA7DUY, 1916 Tolman Rd , Ellensburg, WA 98926., USA.E-mail: [e-mail]. to:

http://www.df4nw.de, Willi Rass, Richard-Strauss-Str. 56, D-91315 Hoechstadt, Germany.

Phone: [phone],
E-mail: [e-mail]

TR7 DDS PTO Replacement:

The N4YG DDS system may replace the PTO in the TR-7 or its remote VFO, the RV-7. When
integrated into either of these, the stability and performance rivals that of the best transceivers.
Web: http://www.n4yg.com/

Radio Repairs:

Jeff Covelli, WA8SAJ, Email: [e-mail] , Web: http://wb4hfn.com/Services/WA8SAJ/SAJ-Repair.htm
WB4HFN Vintage Restoration & Repair, http://www.wb4hfn.com E-Mail: [e-mail]
John Kriner, KA8GSP, Email:
T&T Repair, 630 Copano Cove Rd., Rockport, TX 78382, 1-800-687-9161 E-mail:

[e-mail]

[e-mail]

Technical Information Exchange 15 of 15