[HAM] Very soft volume.

[Organfreak]

At 11:59 PM 7/31/2006, karl sokol wrote:
>O.K.  I am new to the world of Hammond, being the proud new owner of an 
>A-102, which is in perfect cosmetic condition.  Thanks to the internet, I 
>was able to get the tonewheel degunked and moving in good condition.  The 
>problem is, the sound coming out of the speakers is barely audible.
>I adjusted the screw on the pre-amp, which gave a little more gain, but 
>still just barely above audible.
>The speakers themselves are fine as I plugged in a record player into the 
>phono input and it sounded great (and loud).

The fact that the phono input works fine is a hint that the problem is not 
in the later stages of the AO-28 preamp. Everything before that point in 
the signal path is suspect. There could be problems in the preamp itself 
that could be hard to find unless you are a competent Hammond tech. There 
are two inputs to the preamp for the organ, one for vibrato signal and one 
for non-vibrato, so it seems somewhat unlikely that both of those 
connections would be bad at the same time. Does the organ play with the 
vibrato turned on? Off? The connections on the preamp inputs are labeled 
'A' and 'B' (yellow and green wires). Another possibility, which I doubt, 
is a bad matching transformer or a bad connection inside of it. (I have had 
the second problem which resulted in no sound). This is the round can on 
the upper right. The over removes with two screws. Sometimes the tone pot 
on the back of the preamp (slotted screw) will have gotten dusty inside and 
cause total signal failure. Wiggle that back and forth and see if she comes 
to life. That's all I got.


-- 
No virus found in this outgoing message.
Checked by AVG Anti-Virus.
Version: 7.1.394 / Virus Database: 268.10.7/409 - Release Date: 8/4/2006