Re: Need Some Help/some more suggestions

[mwolk@awod.com (Michael Wolk)]

 MFulk wrote:
>
>I thought the mineral oil was fairly viscous too.  On the other hand, I never
>liked having the short tube filled to "factory specs".  No oil was a bit
>much, but I didn't put much in after that.
>On the other hand,,,,,,,,,,,,,,,,the pickup for the reverb unit was a
>"crystal pickup"; it used a susbstance called Rochelle Salt that can
>deteriorate, (usually absorbing moisture slowly through the years tho it was
>sealed),or fail.
>If it should be to your taste, the oil unit can be replaced with a Type IV
>dry unit, utilizing a small pre-amp that is simplicity itself to build, (uses
>one transistor), and runs on cathode voltage from the main amp.  This is a
>modification that was recommended by the factory after the Rochelle Salts
>were becoming either unobtainable or too expensive to supply.  They even
>supplied the pre-amp as a kit.
>If you want a schematic and instructions, i.e. a copy of the Hammond
>Technical Bulletin, let me know, and I'll send it to you by fax or snail
>amil.

Don't get me wrong, the reverb sounds good. For the time and money involved
I'm quite satisfied. I'll probably follow your suggestions and draw some
more oil from the short tube.

"Walkin' Wolk"