Deluxe Reverb problem?

57or62 · April 29th, 2004, 11:41 AM

My DR clone has developed a weird, but
hopefully not too complex, problem. Basically,
after it has warmed up and been played loud (past 6),
a weird whistling whirling sound comes out of nowhere.
It stops if I shut off the standbye and click it back
on after a couple seconds. Almost sounds like a teapot just before full boil. Any ideas? TIA

Sean

mkg · April 29th, 2004, 05:50 PM

Microphonic tube maybe?

57or62 · April 29th, 2004, 07:58 PM

Maybe, how do I check? Power or preamp?

Tremo · April 29th, 2004, 09:55 PM

I'd say it's likely a tube.

You'll have to replace them one by one with known good tubes until you find the culprit.

Lance · April 30th, 2004, 12:34 AM

Remove the tube covers and start up the amp. Then tap the tubes lightly with a chopstick or pencil. The noisey one should announce itself.

AtomicMassUnit · April 30th, 2004, 12:57 AM

Like Lance said, use the gentle tapping method with the covers off and the volume up. Also try taking the first one out if it's ok and start swapping it in other positions until you find the culprit. It's most likely not in the power section. While you're at it, you could get some nice tubes for it, and/or a different speaker.

Atomic

April 29th, 2004, 11:41 AM	#1 (permalink)
57or62 Tele-Meister Join Date: Feb 2004 Location: Philly Posts: 156	Deluxe Reverb problem? My DR clone has developed a weird, but hopefully not too complex, problem. Basically, after it has warmed up and been played loud (past 6), a weird whistling whirling sound comes out of nowhere. It stops if I shut off the standbye and click it back on after a couple seconds. Almost sounds like a teapot just before full boil. Any ideas? TIA Sean

April 30th, 2004, 12:34 AM	#5 (permalink)
Lance Friend of Leo's Join Date: Mar 2003 Posts: 2,197	Tap Tap Remove the tube covers and start up the amp. Then tap the tubes lightly with a chopstick or pencil. The noisey one should announce itself. __________________ Lance "not very good...but I make up for it by playing loud"

April 29th, 2004, 05:50 PM	#2 (permalink)
mkg Tele-Meister Join Date: Mar 2003 Location: Kentucky Posts: 165	Microphonic tube maybe?

April 29th, 2004, 07:58 PM	#3 (permalink)
57or62 Tele-Meister Join Date: Feb 2004 Location: Philly Posts: 156	Maybe, how do I check? Power or preamp?

April 29th, 2004, 09:55 PM	#4 (permalink)
Tremo Banned Friend of Leo's Join Date: Mar 2003 Location: Silicon Valley, CA, USA Posts: 3,803	I'd say it's likely a tube. You'll have to replace them one by one with known good tubes until you find the culprit.

April 30th, 2004, 12:57 AM	#6 (permalink)
AtomicMassUnit Tele-Meister Join Date: Apr 2003 Posts: 153	Like Lance said, use the gentle tapping method with the covers off and the volume up. Also try taking the first one out if it's ok and start swapping it in other positions until you find the culprit. It's most likely not in the power section. While you're at it, you could get some nice tubes for it, and/or a different speaker. Atomic