Sunrise buffer box

abbey road d enfer said:

Did you really experiment more gain with the original values?

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salomonander said:

Hey mate,
No i never used the original values. Just built what you suggested. What i mean is that when inserting the buffer between guitar and yamaha amp the volume actually drops quiet a bit. Cheers

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abbey road d enfer said:

That's quite strange. This booster is actually unity gain, so you should not expect more gain, but you should not experience loss either. Are you equipped to do basic voltage measurements?

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salomonander said:

Thanks, yes i do have my fluke here.... not sure what to measure for though

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abbey road d enfer said:

Check that the rail voltage is correct at 9V (actually new battery delivers about 9.6V), then test the source and the drain of the FET.

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salomonander said:

Thanks mate,
9v rail measures 9.21V
Source 4.75V
Drain 9.21V
Gate 4.17V

Cheers

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