[HAM] 2 Questions

[Dave Bishop]

The first thing is to determine whether the static is caused by the organ or 
the Leslie.  You can do that by making a headphone connector.  You buy a 1/4 
inch female socket and solder a wire to each of the ring and tip tabs.  Then 
you connect the ring tab wire to a screw on the pre-amp chassis and the tip 
tab wire to one of the two "G" terminals on the pre-amp.  Plug in a 
headphones and you should be able to hear from one side whether the static 
persists with the Leslie unplugged.

The next cheap thing to try is spraying all of the tube sockets with Caig 
Industries' De-Oxit and scrape off  any pin corrosion.  Same with the 
sockets connecting the organ to the Leslie.  Also open up the rheostat box 
and lightly spray the copper switches.

A TrekII pre-amp is pretty expensive in relation to the value of the organ 
and does not have the CV tone.  If it was my organ I would rebuild the 
pre-amp, which costs about an afternoon's labor and $70 for parts, if you 
can handle a soldering iron.  I can send you instructions if you decide to 
go that route.

In my experience a frying eggs sound is caused by a resistor going high or a 
failing Mica cap.  I am using the original tubes in a pair of BVs-- they 
aren't stressed much so they don't often go bad.  Be aware that there are 
five tubes, and the 6J7 under the dome shield is the most likely to go foul. 
In this application there is no advantage to metal jacketed tubes.  Its 
always a good idea to keep a set of spares.

Regards,

Dave Bishop