[HAM] CV - No Vibrato -PR20 -No Reverb

[David Damroze]

On Apr 24, 2007, at 11:11 AM, mtcasino wrote:

> On the CV preamp schematic, there are only 5 ground point connections 
> to the
> chassis. They (Hammond) have used tie points such as ground on the 
> filter
> caps, tube socket mounts and terminal strip mounting points. You would 
> need
> to look under the chassis.
>
> The ground is connected to the tone cabinet through the cable.
>
> Have you ever heard the reverb work on that PR-20?
  Not correctly . when I first hooked it up there was reverb feedback 
that
  went away when I turned the reverb selector switch off.
  Unlocking the reverb frame has made the feedback go away - must have 
been
transmitted through the cabinet. Also replaced a microphonic 6AU6.
  The tone cabinet seems to work fine , albeit without reverb , when I 
connect the L100.
  But , that's an amplified signal.  With the CV the sound is kind of 
anemic.
>
> <snip>
>   When they put the thing together, where was it connected?
>   Besides fixing the immediate problem , I'm curious if anything else
> may have been modified and what the larger picture is.
>
> DD
>
> No virus found in this outgoing message.
> Checked by AVG Free Edition.
> Version: 7.5.463 / Virus Database: 269.5.10/774 - Release Date: 
> 4/23/2007
> 5:26 PM
>
>
> --
> Subscription Options/Unsubscribe/Archives: http://www.zeni.net/hf/
> Hammond-Leslie FAQ: http://theatreorgans.com/hammond/faq/
> HammondWiki: http://www.dairiki.org/HammondWiki/
> hammond at zk3.dec.com archives: http://zk3.hammondforum.com/
>