Drake - R-4 - Receiver
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Drake R-4
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R-4
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Information
The DRAKE R-4 is an extremely versatile communication
receiver designed to bring you every feature desirable for
the ultimate in the reception of all modes of amateur
communications.
It provides a linear permeability tuned VFO with 1 KC
readability, and premixed injection with crystal controlled
high frequency oscillator for stability on all bands. A 100
KC crystal calibrator is built-in.
An improved passband tuner/filter with four selectivity
positions, and a built-in notch filter are incorporated to
provide the desired selectivity and interference rejection,
and a noise blanker is built-in for elimination of most
noise on CW, SSB and AM .
As supplied, the unit gives complete coverage of 80, 40, 20,
and 15 meter bands as well as the 28.5 MC to 29.0 MC portion
of 10 meters.
Ten accessory crystal sockets are provided for coverage of
other 500 KC frequency ranges between 1.5 and 30 MC such as
160 Meters, MARS frequencies, WWV, shortwave broadcast, etc.
These sockets can be programmed to give up to 5 MC of
continuous coverage for convenient use with V.H.F. converters.
The R-4 also includes time proven DRAKE AVC with fast attack
slow release for SSB or AM and fast attack fast release for
CW. If desired, the AVC can be disabled altogether for CW
reception.
Complete AVC action and accurate S-meter indication can be
obtained on all modes. A crystal lattice filter following
the first mixer provides excellent overload characteristics
by providing selectivity before gain producing stages.
When used with our T-4 Reciter, transceive operation may be
obtained and when used with the T-4X transmitter, either
transceive or independent receive and transmit functions are
possible.
1 Manual
Service and user manual
Manual type:
Service and user manual
Pages:
40
Size:
2.5 MB
Language:
english
Revision:
Manual-ID:
Date:
Quality:
Scanned document, reading partly badly, partly not readable.
Upload date:
Aug. 9, 2017
MD5:
01fa5e4d-98ba-c576-cacf-dc0de07e2b16
Downloads:
379