INSTRUCTION MANUAL. R. L. DRAKE. MODEL. R.4B. RECEIVER. PASSBAND. MODEL. RECEIVER. PRICE. Instruction Manual. $ GET THE BEST FROM YOUR DRAKE R4B. RECEIVER. Set the trimmer (NB threshold) as described in the R4 manual (turn until the NB attenuates the signal . View and Download R-4 B instruction manual online. R-4 B Receiver pdf manual download.

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I can pick up a signal from the r4b on my shortwave receiver at around 4.

Antique Radio Forums • View topic – drake r4b

This will confirm or not that the VFO is working. If working you can use the built in crystal calibrator as a signal generator.

If you can’t find a manual please do not contact us, draoe the manuals we have are online. If the crystal calibrator is working you will plainly hear it every KHz in the general coverage receiver.

Webmaster, add a Remote rating Drake R4B manual – related links Drak thought you might also be interested in these additional web sites, selected from the same category: You should plainly hear each band select crystal oscillating in the general coverage receiver.

Make sure that any jumpers are in place rear apron that might be required if the unit dra,e paired with a transmitter. TR-7 Manual de uso en espanol. Refine your search for drake receiver. If so go the the mannual step. Drake R4B manual – related links We thought you might also be interested in these additional web sites, selected from the same category: Drake R-4C Receiver instruction manual. The injection cable in the Drake Twins should be a low capacitance cable.


I have put rf into pin 7 and can hear it at and I do get some noise when I inject an audio signal as well. Feb Sun 15, 1: I’m not rb of the R4B, but those Drakes would run transceive with a companion transmitter. You will be very surprised when you see what a difference it will make to replace the old pointer knobs that have lost their shine and have yellowed lines rather than nice bright white lines they had when new.

This is a 62 ohm cable. If the sinewave is still there it either should vary as the VFO frequency is varied OR you are simply measuring AC line pickup, that will be readily apparent from a quick calculation of the frequency based upon your display and time base setting. In this page you find schematic, users and instructions manuals, service manuals, technical supplement, leaf leads and other good stuff.

You should hear each IF frequency in the general coverage receiver. Rr4b have measured the voltage on all the tubes and pin 1 v3 seemed to be the one that was out the most, it is supposed to be CS-7 Coax switch Instruction manual.


There seems to manial a problem serving the request at this time. Of course the switch should end up in the VFO position. With the scope connected to V8 pin 7 do you see the waveform width change as you tune from one end of the VFO to the other?

R.L.DRAKE R-4 B Instruction Manual

This will determine whether or not the band select crystals are oscillating. So to be clear are you not seeing anything at pins 1 mmanual 7 of V8?

PS-7 High resolution schematic diagram.

Greg, Does the signal you pick up at 4. Modified Item see all. Feb Sun 08, 4: Format see all Format. Yes Roger I do have output on those pins, not a pure sine wave about 6 volts on pin 7 and about 6mv on pin 1 greg.

With the probe on V8 pin 1 what do you see when changing to different manua