Re: Sunrise buffer box
« Reply #20 on: March 08, 2020, 06:32:24 AM »
Did you really experiment more gain with the original values?

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


abbey road d enfer

Re: Sunrise buffer box
« Reply #21 on: March 08, 2020, 08:05:48 AM »
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
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?
Who's right or wrong is irrelevant. What matters is what's right or wrong.
Star ground is for electricians.

Re: Sunrise buffer box
« Reply #22 on: March 10, 2020, 08:57:44 AM »
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?

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

abbey road d enfer

Re: Sunrise buffer box
« Reply #23 on: March 10, 2020, 09:58:25 AM »
Thanks, yes i do have my fluke here.... not sure what to measure for though 🤷‍♂️
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.
Who's right or wrong is irrelevant. What matters is what's right or wrong.
Star ground is for electricians.

Re: Sunrise buffer box
« Reply #24 on: March 13, 2020, 07:41:18 AM »
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.

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

Cheers

abbey road d enfer

Re: Sunrise buffer box
« Reply #25 on: March 13, 2020, 09:32:54 AM »
Thanks mate,
9v rail measures 9.21V
Source 4.75V
Drain 9.21V
Gate 4.17V

Cheers
It looks as though the voltages are correct. You're probably expecting something else than unity-gain. Then it would not strictly be a buffer, but rather a booster.
Who's right or wrong is irrelevant. What matters is what's right or wrong.
Star ground is for electricians.


 

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