GONSET G-50 layout and adjustments

C3 adjusts TX "high side".
Coil slugs in VFO adjusts 'low side'.
See manual pg 20 for alignment.

L1
L2
L3
L4

L5

TX VFO/Tripler

V1

6AU6

V2

6AQ5

TX Mic amp

TX/RX AF amp

TX Doubler

455kc RX IF #3

RX 455kc

V4

12AX7

455kc RX IF #2

455kc RX IF #1

RX 2nd Det.
Rx AVCprotector
RX 1st AF amp

V11

6AV6

IF amp

V10

6BH6

ANL/Squelch

T9
L7

V12

6AL5

T8

V7

6BZ6

T10

RX RF Amp

Rx 1st mixer, RX HF Osc

V8

6U8

C52 adjusts RX "high side".
(T9, L7, T10) adjusts 'low side'.
See manual Pg 19 Rx Alignment.

T7

T4

2.3kc RX IF #1

PA

V3

6146B

6L6GB 6L6GB

R56

Meter

zero

adjust

GONSET G-50

Model 3221

Modulation

Transformer

T3

R22

Mic Gain

When using Astatic D104 with Crystal Element,
change (R17) 270K up to 3.9Mohm or 4.7Mohm.

J1

Mic

Spkr

Power Transformer

T1

B+ (312vac)

5v 3A

6.3v 9A

AF/MODAF/MOD

C29A/B/C

V4/5/6 cath byp.

ANT

Change this to

~1.6k 40w

30uF 50v
30uF 50v
30uF 50v

/

V10

6BE6

B+ Choke

T2

T6

HV Rect

V13

5U4GB

6

4

Install diodes and capacitors

in old 5U4 base

1N4007

8

2

50pf 1KV

30uF 500v
60uF 500v

RX 455kc IF

T5

2.3kcRX IF #2

L12

C1A

HV Filter caps

C1B

OEM 5U4GB Rectifier yields Vplate of
268 (rx) and 360 (tx), with a
TX idle of 27-29 watts.

Solid-State rectifier mod and 1.6k 40w
resistor yields stable 260v (Rx) with B+

440v Tx, for a TX idle of 40w.

Add ~10 ohm/ 2W series resistor in
each leg for inrush current limiting.

Capacitor across each diode cuts down
120cycle noise.

Chassis Layout & Adjustments
GONSET G-50