[HAM] CV - no sound -

[David Damroze]

  It's now working :-)

On Apr 7, 2007, at 6:25 PM, Dave Bishop wrote:

> A typical CV will have a six pin female connector in the same box as 
> the
> electrical cord.  Is this where you are connectiong the cable for the 
> PR-20?
> You can trace the wires from that socket to the organ power strip and
> pre-amp, and we can probably tell you if it is hooked up correctly.  
> The
> 27-1 is a wiring harness for a 147 style Leslie hookup kit. It has 
> only five
> pin holes.  The harness connector plugs into a Leslie 26-1 connector 
> box.
> That hookup will not match the stock wiring in a PR-20.  For the PR-20 
> pins
> 1 and 6 are signal, pin 5 is B+, pin 2 is ground, and pins 3 and 4 are
> 120VAC.  For a 147 pins 1 and 6 are signal, pin 5 is Leslie speed 
> switching,
> pin 2 is Leslie speed switching, and pins 3 and 4 are 120VAC.
  Thank you David . That's helped to clear things up for me.
  For some reason , I was expecting the tone cabinet to have an AC plug 
on it. ( I'm learning).
  I now see that the tone cabinet returns the B+ to the console after 
receiving
AC from it.
  Fortunately , Read had also given me schematic book and a description 
of
Leslie pin outs .
   A previous owner had disconnected the signal wires from the tone 
cabinet
connector box to hook up the Leslies. I've reconnected the two wires to 
the GG terminals.
and the third to the ground terminal .
  According to Read , who I got the organ from , there was a 147 and 122 
box on the organ when he
got it . He removed the 122 box for his B3 . I was unclear on what may 
have been disconnected when he did that.
  What's the toggle on the side of the tone cabinet connector for ?

>
> The PR-20 generates a 280 volt current called B+ that travels back up 
> the
> cable to supply the pre-amp tubes.  If this is not being supplied, the 
> tubes
> will light but you won't hear anything, even with headphones.
>
> Have you removed all the tubes (cold) on both units, sprayed the 
> sockets
> with De-Oxit, and re-inserted them a few times to remove the corrosion?
  That's my next step , along with a general cleaning.
The organ is playing , but with some general distortion.
  Also , the bass pedal notes seem kind of umm .. flatulent ( for lack 
of a better word)
rather then full .

  Thank you for your assistance.
  Now I just need to figure out how to get this big black monster to
  blend unobtrusively into the decor of our apartment living room ( 
domestic tranquility and all that ).

  David D.
>
> Regards,
>
> Dave Bishop
>
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