Solid state continuous coverage synthesized hf system Model 1337
| The TR-7 System is the result of one of the most extensive
engineering and development programs in the history of the R. L. Drake Company, and
provides the user with many innova tive design fea tures. With the excellent design of its front panel and controls. the system is simple and straightforward to operate-makes state of the art performance a pleasure. |
MHz.* The Aux-7 Board also provrdes 0 thru 1.5 MHz receive coverage and crystal-controlled fixed channel operation for Government, Amateur, or semi-commercial applications anywhere in the hf range. The TR-7 w/o DR-7 provides coverage of the Amateur Bands 160 thru 15 meters and the 28.5-29.0 MHz range of 10 meters. The Aux-7 Range Program Board is also useable in the standard TR-7 for extra range coverage as noted. |
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| Broadband, Solid State
Design -100% solid state throughout. All circuits are broadbanded SO there is no
need for preselection tuning or transmitter adjustments of any kind. Synthesized/PTO Frequency Control - A Drake exclusive: Special high performance synthesizer, combined with the famous Drake PTO, provides smooth, linear tuning with 1 kHz dial and 100 Hz digital readout. 500 kHz up/down range switching is pushbutton controlled.
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State of the Art Receiver
Design - The Drake TR-7 introduces another industry first for amateur
transceivers: "Up-Conversion," in combination with a special high level double
balanced mixer for superior strong signal handling, spurious and image response
performance. The first i-f of 48.05 MHz places images well outside the receiver passband,
and provides for true general coverage operation without i-f gaps. True Passband Tuning -The TR-7 employs the famous Drake Full Passband Tuning instead of the limited range "i-f shift" found in some a other units. The Drake System tunes from the top edge of one sideband, through center, to the bottom edge of the othersideband. In fact, the range is even wider to accommodate RTTY Full passband tuning greatly improves receiving performance in heavy QRM. |
Special High Power Solid State PA-A
Drake custom-designed diagonal heat sink provides for an internally mounted power
amplifier with nothing mounted outboard subject to physical damage The unique air ducting
effect of this amplifier allows an optional rear-mounted fan to provide continuous duty on
SSTV/RTTY Continuous ssb/cw operation is available without the fan, due to the excellent
heat sink design. The optional Drake PS-7 Ac Supply is rugged, rated for continuous duty, and Will easily handle power requirements. The System is rated 250 watts input-in any of its modes. Fully VSWR protected. |
Continuous, Wide Range Frequency Coverage - The TR-7/DR-7 provides reception from 1.5 thru 30 MHz-continuously, and zero thru 30 MHz continuously with the optional Aux-7 Range Program Board. No gaps or range crystals required. The highly advanced Drake Synthesizer makes this possible, and is an industry first. The TR-7/DR-7 provides transmit coverage for all Amateur Bands 160 thru 10 meters. With the optional Aux-7 Range Program Board, diode-programmable out-of-band transmit coverage is available for MARS, Embassy, Government, and future band expansions in the range 1.8 thru 30
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Unique Independent Receive Selectivity ique Independent Receive Selectivity - Optional receiving selectivity filters can be installed internally and pushbutton-selected from the front panel. These may be selected independently of transmit mode and provide optimum response for various conditions of ssb, cw, RTTY and a-m. You may also transmit cw while receiving ssb, or vice versa, or even transmit one sideband while receiving the other. The standard filter is 2.3 kHz for ssb. You may choose from optional 300 Hz, 500 Hz, a special 1.8 kHz for crowded ssb, or 6 kHz filter for a-m. Any three may be installed in addition to the ssb filter. |
TR-7 Internal Test Facilities-As wellas the standard "S" meter function, the TR-7 metering includes a built-in rf Wattmeter/VSWR Bridge. Also, the DR-7 digital counter reads frequencies to 150 MHz for test purposes. Access to the counter is from the rear panel. | |
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| Effective Noise Blanker-This accessory is custom engineered to provide true Impulse-type noise blanking performance. | Receiver Incremental Tuning (RIT)-Complete RIT Flexibility is provided for both the TR-7 and RV-7 remote VF0 for maximum convenience. The RV-7 also Includes a special "spot" function for easy zero beating |
Pictures : R.L. DRAKE
| Note: Out-of-band transmitter coverage for MARS, Government. etc is available only in ranges authorized by the FCC. Military. or other government agency for a specific service. Proof of Iicense for that service must be submitted at the discretion of the R L Drake Company, Including the 500 | kHz range to be covered.Upon approval and at the discretion of the R.L. Drake special range IC will be supplied for use with the Aux-7 Range Program Board. Prices quoted trom the factory see operator’s manual for details (Not available for company requirinq type acceptance). |