Happy new year to all
I have the X-66 in a warehouse where there is no climate control. it was working fine while it was hot here in Florida, but now since it got cold, I think it blew one of the transistors that create the g notes. None are playing on the naturals (16', 8', 4' etc..)
only on the other ones.
Can any body tell me which transistor is it ?

Thanks in advance

Jaime

Hello Jaime,

I hope that you have been able to fix your X-66, but if not here is my experience and it was
not a transistor issue.

I had the F# note going out after playing for about 10 min. or so and it affected the other footages also. As you know, the tone generator only generates the top octave of notes and all of the rest are derived by splitters. If you set all of drawbars to 0 except the 1' one and then test the highest octave on the organ you can be sure about the note causing the problem. I assume that you have done that.

Does the note play and first and then go out? I noticed that when I had removed the top rear panel of the base of the organ, the F# note would work longer (about 20-30 minutes of playing.) Then I payed more attention to the heat generated by the generator motor and it ran very, very hot (despite being well-oiled.) I am the third owner of the organ, so I don't know the history well. After talking with another owner that had a similar problem years ago, I decided to go ahead and replace the tonewheel generator with the TrekII Transposer. When I did, no more problem, just like the other owner said. It was a heat issue. The sound from the Transposer Board works great!

You are saying that it is a cold issue, but also check the motor. If it plays at first and then goes out, maybe the cold causes more strain on the motor and it heats up. Anyway, it could be this type of issue and not necessarily a transistor or maybe the cold causes a poor connection to lose contact. It is fun isn't it?

I hope that this will help. If not, maybe it will help someone else. You play so well and I always
enjoy watching your YouTube videos and I hope we will see each other again at the next Convention.

Best wishes from Texas,

Jim

Hello Again Jaime,

The part that I left out before in my blurb about the missing note and the tonewheel generator
is:

My repair tech here in Texas initially thought that the missing F# note was caused by a problem
(probable bad transistor) on the F# board. A transistor tested rather poorly and he replaced that
transistor and another one while he had that circuit board exposed. Bottom-line: That did not
solve the missing note issue. It was only solved when I replaced (myself) the tonewheel generator
with the TrekII Transposer Board. The symptoms putting the tonewheel generator under suspicion
were the apparent relationship of heat and time to the disappearance of the note and the fact that the generator motor got extremely hot and the power supply did not. With the obvious motor
problem, I just changed to the Transposer Board and the missing note problem was solved.

Another owner we know had the same problem and it was solved in the same way. Maybe it is
just a transistor, but for us it was not. Good luck!

Jim

Hello Jaime,

Is the problem of missing note resolved on your X-66 ?
If not, I can try to help you 'remotely'.
You need three major things:
- a good technician
- one oscilloscope
- the X-66 service manual (can be loaded on the X-66 website)
Repairs of dividers boards is not complicated.
If you have the above elements, I will forward you the whole procedure to fix it.
All the best,

Dan Vigin / Belgium