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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Buying Format see all. Greg, Does the signal you pick up at 4. So what amplitude measurements are you getting on other bands on pin 1? With the probe on V8 pin kanual what do you see when changing to different bands? Does the crystal calibrator in the R4B work? Greg, Use your scope 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 manua as you tune the PTO.

I’m not sure of the R4B, but those Drakes would run transceive rrake a companion transmitter. If it doesn’t work after the above, you will need to start checking the voltages and resistance at the pins, but I would go through the basics first.

Guaranteed by Mon, Jan 7. As I understand you have already confirmed that the 5. Oxidation of the switch contacts often result in the PTO not being connected to the premix circuitry.


SP Manual inc Schematic. Unit has been tested and works well as it should. This is for 3 Dust Covers that are custom made for the Drake 3 line and 4 line.

This will confirm or not that the VFO is working. Do some voltage checks. And when you click on the file or icon it will count as a download. This is all the manuals for Drake. If so go the the next step.

R.L.DRAKE R-4 B Instruction Manual

I am not sure where to go from here. If it doesn’t tune put you scope back on pin 7 the VFO input to the premix AND set the xtals switch away from norm to a position which doesn’t have a crystal installed. With the R-4B set for 80 meters you should see an output ranging from 9. Unfollow drake receiver to stop getting updates on your eBay feed. For example, the 40 meter range uses an This will determine whether or not the band select crystals are oscillating.

Feb Sun 15, 2: This page was last updated: I was testing it last night and heard a signal at 3.

They could run on either VFO. If you have some stuff that not is listed here you can donate this by contact mods. Show only see all Show only. Amounts shown in italicised text are for items nanual in currency other than Euros and are approximate conversions to Euros based upon Bloomberg’s conversion rates. If the crystal calibrator is working you will plainly hear it every KHz in the general coverage receiver.


-> Instruction, users and service manuals for Drake

If working you can use the built in crystal calibrator as a signal generator. Feb Sun 15, 1: Delivery Options see all.

I have measured the voltage on all the tubes and pin 1 v3 seemed to vrake the one that was out the most, it is supposed to be Refine more Format Format. What I am suggesting below is not how a seasoned tech mankal go about it, but I get the feeling you may not be a seasoned tech mznual following the steps listed below may keep you from going the “shotgun” approach and getting frustrated. Books Support This Site: RV-7 Manual de uso en espanol.

Feb Sun 15, 3: Of course the switch should end up in the VFO position. AL4 Loop antenna Manual. Greg, The VFO amplitude pin 7 of V8 shouldn’t change as you tune but the period of the sine wave should.