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Title: OTS 1st power up squeals Post by: GuitarHack on May 19, 2011, 08:41:06 PM Powered up using the Variac to slowly turn up the voltage.
Nothing went poof!! But, when Voltage gets into operating range, I get a high squeal - seems to be connected to the PI tube. Tried different tubes. With or without tubes in V1 and V2, when a tube is in V3 it squeals. With no tube in V3 (with or without tubes in V1 and V2) - no squeal. When I cut power, squeal fades out (doesn't end abruptly) Any ideas? Thanks Jon Title: Re: OTS 1st power up squeals Post by: SoundPerf on May 19, 2011, 09:22:42 PM Sounds like the OT primaries are reversed. Try switching them around.
Title: Re: OTS 1st power up squeals Post by: GuitarHack on May 20, 2011, 04:00:09 AM Thanks a billion, Chris. That solved it.
I'm actually hearing a guitar now! AWESOME!!! So now I just have to set the PI and bias and burn 'er in. Thanks again - you made me a very happy camper. Jon Title: Re: OTS 1st power up squeals Post by: SoundPerf on May 20, 2011, 07:18:15 PM You're totally welcome. Glad to hear it.
Enjoy your new amp! |