Howl and Squeal in a High Gain Tube Amp

[PwnEdgE1]

Interesting ,tube shields really work ,and keeps the dogs quiet too lol

[patricefrey]

That was useful. Thanks !



[SoylentGreen84]

Ear rape.

[mike6l6]

The preamp tubes are too close to the output tubes. When i build amplifiers ,I always put the 1st preamp furthest from the output stage

[CorvetteCoonass]

@mike6l6 Put some metal covers over the pre-amp tubes. It creates a ground shield and cancels out a lot of the noise.

[shellsj]

Great tip!

[ioginy]

i have been having problem like this with an amp i just built. I'll have to try this tomorrow morning.

[syberraith]

I have eliminated the problem now by readjusting gain levels in the FX loop circuitry and switching to a lower gain tube there too, and installing real tube shields over the preamp tubes.

[simpleheartedskater]

hey man thanks for this.