HBE Squealing Feedback

Area for the Synergy line of amps and modules
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TubeMan5150
RM20
Posts: 47
Joined: Sat Sep 10, 2016 10:13 am
Location: Wisconsin

HBE Squealing Feedback

Post by TubeMan5150 » Sat Jan 13, 2018 1:37 pm

My new HBE module is unusable with the gain past noon. I get a ton of squealing feedback then. In comparison I also have the SLO and BE and both those modules are quiet even with gain at 3 o'clock.

I replaced the pre-amp tubes in the HBE...no change. Probably needs to be sent back to Synergy.

Anyone else experience this with a high gain module?
Randall Jaded Faith RM100, Synergy SYN-2, Synergy 50/50
Synergy: TDLX, BMAN, OS, DS, BE, HBE, SLO, VH4

gtr31
Lynch Box
Posts: 560
Joined: Mon May 22, 2006 12:48 pm
Location: ottawa

Post by gtr31 » Sun Jan 14, 2018 9:55 am

does it get worse turning any of the tone controls up

I know a few guys had an issue with DZL mod , and it was a ground on the mid pot

ricky
Lynch Box
Posts: 926
Joined: Tue Sep 20, 2011 4:44 pm
Location: Bozeman, MT

Post by ricky » Tue Jan 16, 2018 12:06 pm

I have a single mod form Salvation and like another mod from JF that doesn't just seat right and squeals when I turn up the gain or turn on the high gain switch. I press on the faceplate and it goes away. Try that and if that is the case I have a quick fix for you.

TubeMan5150
RM20
Posts: 47
Joined: Sat Sep 10, 2016 10:13 am
Location: Wisconsin

Post by TubeMan5150 » Wed Jan 17, 2018 4:38 pm

OK I take back blaming the HBE module. There is nothing wrong with it.

After more detailed troubleshooting and the problem getting more consistent (less intermittent), worse, and affecting all the modules in the amp now it's the FX loop. After unplugging the loop, problem gone. Probably the FX loop buffer tube. Swapping in a new tube is next on my list.

On another note I did get quick reply from Boutique Amps Distribution tech support. So that's a good thing.
Randall Jaded Faith RM100, Synergy SYN-2, Synergy 50/50
Synergy: TDLX, BMAN, OS, DS, BE, HBE, SLO, VH4

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