SFDR Reverb

wmthor · Post by **wmthor** » Tue Oct 10, 2006 6:28 am

I got my SFDR back from the shop yesterday and now I'm a little bummed. I started getting a high pitched hum whenever the reverb is turned up past 4 or 5. Any idea of what I can do short of returning it to the shop?

ric480 · Post by **ric480** » Wed Oct 11, 2006 5:48 am

If you have a spare 12AT7 tube, swap it with the reverb driver tube in V3. If still humming, swap a spare with the 12AX7 in V4. If still humming, at least you know the reverb tubes aren't the problem.

wmthor · Post by **wmthor** » Thu Oct 12, 2006 3:38 am

Thanks John.

admin · Post by **admin** » Thu Oct 26, 2006 6:23 am

Richard: Charlie's back, perhaps he can give you some pointers.