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The R.L. Drake model TR-6 is a radio
transceiver which, in conjunction with an external fixed or mobile power
supply and a suitable antenna, permits two way radio communications on
any frequency in the 6 meter amateur band as well as on adjacent
frequencies. The mode of transmission and reception is switchable. The
unit is capable of communicating in the SSB, AM, FSK, and keyed CW
modes. Appropriate modulators and detectors are provided for each mode,
as well as switching for appropriate IF filters.
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GENERAL DESCRIPTION:
 | FREQUENCY COVERAGE: 49.4 to 54.0 MHz in
9 overlapping 600 KHz ranges (49.9 to 51 . 0 MHz with crystals
supplied) . |
| FREQUENCY ADJUSTMENT: Solid state linear
permeability tuned VF0 permits continuous frequency coverage. |
| DIAL CALIBRATION: 1 KHz divisions: dial
accuracy is within +- 1 KHz if calibrated at nearest 100 KHz point |
| CALIBRATOR: 100 KHz calibrator built in. |
| FREQUENCY STABILITY: Less than 100 Hz
overall drift per hour after 15 minute warm-up period; less than 100
Hz for 10% supply voltage change. |
| SPLIT FREQUENCY OPERATION: Transmitting
and receiving frequencies may be separated by up to 600 KHz by use of
the RV-6 or FF-1
accessories or an external receiver. |
| MODES OF OPERATION: SSB, AM, and CW. |
| AUTOMATIC T/R SWITCHING: With
multi-contact relay . Front panel switching provided for
2m-transverters. |
| IF BANDWIDTHS: 4 filters switchable from
front pane1 (USB filter provided) . |
| VACUUM TUBES AND SEMICONDUCTORS: 19
tubes, 9 bipolar transistors, 4 field effect transistors, 12 diodes. |
| SIZE: 5 - 7/16" high, 10 -
3/4" wide, 14 - 1/4" deep (cabinet without feet and knobs)
.WEIGHT: 15 - 3/4 lbs. |
RECEIVER SPECIFICATION:
| SENSITIVITY: Less than 1/10 microvolt
for 10 dB S+N/N ratio at 2.4 KHz bandwidth. |
| SELECTIVITY: 6 dB bandwidth 2.4 KHz
nominal. 50 dB bandwidth 7 KHz maximum, with USB filter provided.
Accessory filters, switchable from front panel available for LSB, AM
(6 KHz at 6 dB) , and CW (. 3 KHz at 6 dB). |
| AUDIO RESPONSE: 400 to 2800 Hz at 6 dB. |
| INPUT: 50 ohms unbalanced. |
| OUTPUT: 4 ohms unbalanced, speaker and
headphone output provided. |
| OUTPUT POWER: 2 watts at 10% HD. |
| AVC: Output variation less than 3 dB for
60 dB input change. Drake AVC system provides fast attack (less than
100 micro-seconds) for pop-free, pump-free, distortion-less automatic
volume control. Release time switch-able from front pane1 (1 second on
"slow", 200 milliseconds on "fast"). |
| MANUAL GAIN CONTROLS: RF gain control
sets threshold for AVC; AF gain control. |
| DETECTORS: Switchable from front panel.
Product detector for SSB and CW, envelope detector for AM. |
| NOISE BLANKER: On-off switch for
accessory noise blanker provided on front panel. |
| 14 MHz INPUT: 13.9 to 14.5 MHz receiving
input/output jack provided for converters and/or outboard IF
receivers. T/R muting contact for out-board receiver provided. |
| S-METER: Input level meter with 100 dB
range provided. |
TRANSMIT SPECIFICATIONS :
| POWER INPUT: 300 W minimum PEP on SSB,
300 W PEP (75 W peak carrier compatible with SSB amplifiers) on AM.
260 W CW. |
| OUTPUT IMPEDANCE: 50 ohms nominal,
unbalanced, 2:l maximum SWR, loading adjustable from front panel. |
| MODES: SSB (Upper sideband provided,
lower sideband with accessory filter) AM (controlled carrier screen
modulator built in). CW (grid block keying shaped for click free
keying) . Modes selectable with front pane1 switch. |
| AGC: Amplified automatic gain control
prevents flat-topping and provides moderate speech compression in the
SSB mode. |
| CARRIER INSERTION AND SHIFT: Automatic
carrier insertion on AM, shift carrier system on CW. |
| INPUTS: Closed circuit type key jack for
CW; high impedance high level microphone input on SSB and AM, 3 mv
peak RMS minimum required for full |
| PEP output. Manual gain control for CW
and SSB/AM provided on front panel. |
| VOX AND PTT: VOX and ANTI-VOX built in.
Separate VOX and ANTI-VOX gain controls provided. PTT contact provided
on microphone jack. VOX also effective on AM and keyed CW, providing
automatic semi break-in CW. |
| AUDIO RESPONSE: 400 to 2800 Hz at 6 dB. |
| CARRIER AND SIDEBAND SUPPRESSION: 40 dB
minimum sideband suppression above 1 KHz. 50 dB minimum carrier
suppression. |
| DISTORTION PRODUCTS: Down 30 dB minimum
from PEP level. |
| MONITORING AND METERING: Final plate
current, AGC action, and relative output can be read on meters.
Sidetone with separately adjustable volume provided for keyed CW. |
| 14 MHz OUTPUT: 13.9 to 14.5 MHz
transmitting output for 2m-transverter. |
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ACCESSORIES for TR-6 :
| MMK-3 Mobile
Mounting Kit |
| RV-6 Remote VF0
for TR-6 : Remote VFO’s permit rcvg, xmtg or xcvg on separate
frequency in same band as xcvr |
| FF-1 Fixed
Frequency Adapter: Crystal Control Unit plugs into and sits under
TR-6. Gives two channels in ham bands |
| NB-9 Noise
Blanker for TR-6 |
| MC-4 Mobile
Console |
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Drake TR-6 50-MHz Transceiver (R. E.)
(c) QST 07/1977 - page 54 - 415 Kb file - Adobe
pdf version
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Dear Jean-Marie, Monday, August 20, 2000
We didn't build a DC-23.
The first mobile power supply was the DC-3, it was produced for the TR-3
transceiver. The DC-4 followed with the introduction of the TR-4. We
also produced a DC-24 for those with a 24 volt power source, as aboard ships,
airplanes etc.
Regards,
Bill Frost
Service Manager
  
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