[Drake] R4-C question

[Garey Barrell]

Larry -

Well that certainly could be the problem.  It's  _possible_  that 
someone "hard-wired" the two jumpers necessary, since the 7 pin tube 
"header" plugs are a little hard to find these days.

Most likely the seller pulled the NB to sell it separately (it's just a 
matter of time before the tubes are pulled and offered in "another one 
of my auctions", along with the calibrator, filters and anything else 
that just "unplugs".

But to answer your question, yeah, that would pretty well kill the 
receiver!!  The jumper is a little ambiguous in the schematic.  You need 
to tie Pin 3 to Pin 6, and Pin 4 to Pin 7.   You can just stick wire 
into the socket until you can find a plug.  The wires DO cross however, 
so one has to be insulated.

Easy fix for a great receiver!

-- 
73, Garey - K4OAH
Atlanta

Drake B & C-Line Service Data
<http://www.k4oah.com>



 

telegrapher at att.net wrote:
> This must be the stupid question of the year.  I've been complaining 
> that my R-4C which was supposedly really a hot radio has low 
> sensitivity, audio and other things related.  Just happened to be 
> looking on Ebay at some Drake items and i see that one fellow is 
> selling the 7 pin plugins for the noise blanker socket for when the NB 
> is not there.  A light bulb came on and i asked myself, since the NB 
> is not in this receiver, what is plugged into that socket, if 
> anything?  Grabbing a flashlight so i could see inside the radio, it's 
> tucked away on a shelf in a spare bedroom where light is sparse (keeps 
> the heat level down and uses less electricity of course) and took a 
> peak into the top of the receiver.  guess what?  No plug in that 
> socket.  Now the question is, will that kill the receiver, well not 
> really but deaden it considerably?  Little or no "S" meter readings, 
> peaking of the preselector works but not significantly and audio 
> output is way down. I'm suspecting that i've found the cause of all my 
> problems with it.
>
> Experts?  Now why would the seller of this beautiful radio do such a 
> thing and, if that is the trouble with it, then turn around and say 
> it's a really great receiver, i use it all the time and it works 
> flawlessly?
>
> Lying S*#
>
> larry
> W0OGH
>
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