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Solid State Guitar Amp Forum | DIY Guitar Amplifiers

Solid State Amplifiers => Amplifier Discussion => Topic started by: markorock37 on June 06, 2023, 02:29:18 PM

Title: Hartke HA5000 biasing
Post by: markorock37 on June 06, 2023, 02:29:18 PM
I have a HA5000 on the bench. After checking the bias at TP1 on both modules, I have one at 36mv and the other at 91mv. Anyone know what the recommended setting is for this amp?
Title: Re: Hartke HA5000 biasing
Post by: g1 on June 08, 2023, 12:33:58 PM
Can you post the correct schematic for your unit?
Otherwise there is no way to tell what TP1 is.

Off the top of my head I would say to go with the lower reading for both channels, unless you see crossover distortion.
Title: Re: Hartke HA5000 biasing
Post by: Tassieviking on June 09, 2023, 12:16:08 AM
I can't see TP1, but I think I have the correct schematic.
Title: Re: Hartke HA5000 biasing
Post by: markorock37 on June 09, 2023, 04:25:33 PM
That's the schem I have also.
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