[sdiy] Oscillator caps - please help!

[Ingo Debus]

Am 14.08.2007 um 21:59 schrieb Antti PitkXmXki:

> I'm currently having a project of fixing a Vox Super Continental  
> (UK model) combo organ. I have decided to first order every part  
> that I could possibly need before starting the project. However, I  
> have a problem. The 12 master oscillators of the organ each has a  
> coil, and two caps.

Do you actually want to replace all the caps or do you only want to  
buy them just in case?
I would'nt replace these caps if not necessary. Replacing a cap means  
that the oscillator probably has to be re-tuned. This may or may not  
be difficult, I don't know this organ good enough.
I once fixed an old Philicorda organ where indeed one of the master  
oscillator caps had gone bad. I ended up selecting one from the many  
I had of that value so that the pitch was correct. Otherwise I'd have  
had to adjust the core of the coil, which was glued in place and  
looked very fragile.
It was amazig how good the tuning of that sixties organ still was.  
Since all the cores were glued in place, it obviously never had been  
re-tuned.

Ingo