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-   -   "WHAMMY" Pass DIY headphone amp guide (https://www.diyaudio.com/forums/pass-labs/317803-whammy-pass-diy-headphone-amp-guide.html)

batty 29th August 2018 12:01 AM

Thanks

Oracle1 29th August 2018 09:27 PM

Please HELP. i test the psu and +rail ok (+16,86) but in minus i have -26,4v. I changed the 7915 and the cap 220uf but the same -26,35. What shal i do?

6L6 29th August 2018 10:47 PM

Seems the regulator isn’t working. Please post a couple well-lit, in-focus photos of the regulators and associated components.

batty 29th August 2018 11:07 PM

Could the -ve reg be in the wrong way around?

batty 29th August 2018 11:08 PM

Last parts for mine are expected today, less the case.

Oracle1 30th August 2018 07:15 PM

I have changed ALL items of the psu even the transformer. The same! So i give up. No more Whammy for me. Pitty

wayne 30th August 2018 07:40 PM

You need to get an Ohm meter out and find the short on the board.

Oracle1 30th August 2018 08:12 PM

Finally i put R9,10,13 and R14 and i have +21,21 and -21,23. I omitt leds. Hurray!!!! I dont anderstand , maybe the leds? I’ve chacked everything nothing was short on the board. I am very happy and i thing it is time to continue the assebly. The black pcb is very beautyfull!

HiGHFLYiN9s 30th August 2018 08:51 PM

Quote:

Originally Posted by Oracle1 (https://www.diyaudio.com/forums/pass-labs/317803-whammy-pass-diy-headphone-amp-guide-post5531631.html#post5531631)
Finally i put R9,10,13 and R14 and i have +21,21 and -21,23. I omitt leds. Hurray!!!! I dont anderstand , maybe the leds? Iíve chacked everything nothing was short on the board. I am very happy and i thing it is time to continue the assebly. The black pcb is very beautyfull!

Glad you were able to work things out!

batty 30th August 2018 09:22 PM

I used Green LEDs at 2.1v, supplies are sitting at approx +/- 18.
I will complete the PCB this weekend then wait for the case I ordered to turn up.


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