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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Drake R4B manual
RV-7 Manual de uso en espanol. Greg, 3 and 4 are the heater so you are seeing 60hz AC there. SP Manual inc Schematic. All cables are professionally built and assembled and fully tested. Greg, Use your mahual to see if there is output from the pre-mixer at the cathode of mixer tube V2, the premix frequency will depend upon the band in use and should be observed to change as you tune the PTO.
This is the manuals page for Drake. For more recent exchange rates, please use the Universal Currency Converter.
I just finished bringing a R4C to life. You can confirm the PTO and premix output frequencies by also listening using a general coverage receiver tuned to the appropriate frequencies with an antenna lead near the premix tube. Previous topic Next topic. Printed on hi-gloss 28lb high quality acid free paper for a professional finish that won’t turn yellow with age.
You should hear each Manuxl frequency in the general coverage receiver. Feb Mon manula, About Drake R4B manual The resource is currently listed in dxzone. The amplitude will change when the preselector is adjusted.
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Next change out the electrolytic capacitors. The only ones I remember from my R4C are If the crystal calibrator is working you will plainly hear it every KHz in the general coverage receiver. Unit has been tested and works well as it should.
If you hear some but not all of the above oscillators in the general coverage receiver, your problem at least mxnual of them is in the area where you hear nothing.
With the R-4B set for 80 meters you should see an output ranging from 9. Feb Sun 08, 5: Of course the switch should end up in the VFO position.
Clean up the radio, replace any light bulbs, check if g4b phono connectors on the back are still making contact with the the male phono plugs. This is all the manuals for Drake. The PTO covers from 4. TWO 2 Radio Shack 47 6. The injection cable in the Drake Twins should be a low capacitance cable.
Put your scope on pin 1 of V8 and you should see the output of the crystal high frequency oscillator.
R.L.DRAKE R-4 B Instruction Manual
I’m not sure of the R4B, but those Drakes would run transceive with a companion transmitter. He used g4b for many years and then it was parted out.
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? I will do my utmost to resolve any issues. R-4C Original low voltage power supply schematic. Number of bids and bid amounts may be slightly out of date. Item location see all Item location.
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