DRAKE TR-4 INFO
Year 1964 GENERAL DESCRIPTION
The R.L, Drake model TR-4 is a single sideband transceiver designed for the transmission and reception of upper and lower sideband signals on the 80 through 10 meter amateur bands, AM and CW capabilities are included.
Its compact size makes it ideal for both fixed station use in conjunction with our model AC-3 120 volt AC Power Supply, or for mobile installations, using our model DC-3 12 volt DC Power Supply.
The 300 watt P.E.P. input on SSB enables the TR-4 to give an excellent account of itself barefoot and it will drive the highest powered ham linear amplifiers.
Upper and lower sideband selection is accomplished by switching between two 9 mc crystal lattice filters with 2.l KC passbands. Among the other features included on the TR-4 are VOX and PTT on SSB and AM, diode detection for AM, shifted carrier CW, automatic transmit receive switching on CW, built in CW sidetone, separate RF and AF gain controls, solid state VFO with linear permeability tuning, transmitting and receiving AGC indicator and plate ammeter/RF output indicator, adjustable pi-network output, and built in crystal calibrator.
The addition of the accessory RV-4 remote VFO speaker combination enables the operator to receive, transmit, or transceive throughout the band being used without disturbing the setting of the TR-4 tuning dial. This is useful for working DX stations operating outside the United States phone bands, or for working near your own frequency in search of a clear spot under crowded band conditions. The accessory FF-1 is a fixed frequency adapter useful wherever crystal controlled operation is desired. It provides two switch selected channels and allows off , crystal controlled transmit only or transceive operation.
GENERAL SPECIFICATIONS
FREQUENCY COVERAGE: Full coverage on all amateur bands 10 thru 80 meters, in seven 600 kc ranges: 3.5 to 4.1 mc, 7.0 to 7.6 mc, 13.9 to 14.5 mc, 21 to 21.6 mc, 28 to 28.6 mc, 28.5 to 29.1 mc, 29.1 to 29.7 mc.
SOLID STATE VFO: Has linear permeability tuning. Tunes 4.9 to 5.5 mc for all ranges.
DIAL CALIBRATION: 10 kc divisions on main tuning dial and 1 kc on tuning knob skirt. Effective length of circular dial scale is over 14 inches. FREQUENCY STABILITY: High stability solid state VFO tunes same range on all bands. Overall drift is less than 100 cycles after warm-up, and less than 100 cycles for plus or minus 10% line voltage change.
MODES OF OPERATION: SSB (Upper or Lower Sideband), CW, and AM.
FRONT PANEL CONTROLS: Main Tuning has fluted knob with adjustable 25 division skirt. Tunes VFO and rotates main dial. RF Tune tunes the RF circuits common to receiver RF amplifier and transmitter driver stages. 0-10 scale.
Plate and Load tuning adjust pi-network capacitors in transmitter for proper resonance and loading on each band. Band switch selects desired ham band (see frequency coverage).
Function switch has four positions; CAL, SSB, X-CW, X-AM. CAL operates built-in 100 kc crystal calibrator for accurate setting of main tuning hair line indicator and knob skirt. SSB provides SSB operation, either VOX or PTT. X-CW provides for CW operation with automatic transmit receive switching and CW sidetone, and is used for tune up. X-AM provides controlled carrier AM operation with VOX or PTT, and with diode detector for receiving.
XMTR GAIN functions as mike audio gain on SSB and AM, and as carrier injection control on CW.
RCVR GAIN knob controls receiver AF gain and power ON-OFF switch. Lever behind knob controls setting of RF gain.
SIDEBAND switch in conjunction with indicator lights marked Upper and Lower selects desired sideband by connecting into the circuit either the upper or lower sideband filter. (X position used when in X-CW or X-AM positions of Function Switch.)
OUTPUT METER CONTROL switch converts plate meter to read relative OutPut, when pushed. Rotating varies output meter sensitivity.
RIGHT SIDE SCREWDRIVER ADJUST CONTROLS: VOX Gain
Anti VOX Gain
S-Meter Zero
RIGHT SIDE JACKS: Headphone (disconnects speaker circuit)
Microphone (3-circuit for PTT)
Key (normally closed) .
REAR CONTROLS: Sidetone (adjusts sidetone volume)
Lights (for dimming dial lights).
REAR JACKS: Power (connects TR-4 to power supply and speaker)
RCVR MUTE (for muting an external receiver)
RCVR ANT (Uses TR-4 ant. relay to connect an external receiver to the antenna)
Antenna (for connecting the TR-4 to the antenna).
LEFT SIDE CONTROLS: TCVR/RCVR switch (for selecting between the use of the TR-4 or an external receiver for receiving).
INSIDE CONTROLS: Carrier balance .
METERS: Receiver S-Meter/transmitting AGC indicator
Transmitter Plate Ammeter/relative R. F. output indicator.
MISC: 20 tubes including voltage regulator; two transistors; nine diodes; 100 kc crystal calibrator built in; Dimensions: 5 1/2 high, 10 3/4 wide, 14 3/8 deep.
Weight: 16 lbs.
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