[HAM] 2 Questions

[Dave Bishop]

Swapping tubes is a cheap way to fault check the pre-amp, but the resistors 
and capacitors that feed into the tubes can also be the source of hiss or 
roar.  Perhaps you are talking about a "microphonic" tube, that is picking 
up vibrations from the organ and amplifying them directly.

The TrekII pre-amp for this organ lists for $648, plus $187 for the 
percussion switches, plus labor.  For $1,000 you could probably snag an 
A100.  You might want to clarify what you are being offered for a couple 
hundred dollars.  Once the solid state pre-amp is installed it should work 
very well--  though to my taste it is not the "CV" sound.  If you can get it 
installed for $300, its a very reasonable investment.

De-Oxit D5 is available at Guitar Center, some Radio Shack stores, on line 
at places like Musiciansfriend.com, and from many of the Hammond techs on 
this list.  Here is an example:

http://www.partsexpress.com/pe/showdetl.cfm?Partnumber=341-200

You can get replacement tubes from www.tubesandmore.com or 
www.vacuumtube.com.

Regards,

Dave Bishop