Bottlehead Forum

Bottlehead Kits => Kaiju Stereo 300B amp => Topic started by: blackharp on May 06, 2023, 06:43:04 AM

Title: Driver Testing Error [resolved]
Post by: blackharp on May 06, 2023, 06:43:04 AM

On page 65, IA & IO measure correctly, but at 32U I get 136VDC and the potentiometer on the board does not affect the reading. I turn and it remains. On 46U, I was able to adjust the pot to 175VDC. Any ideas?

Title: Re: Driver Testing Error
Post by: blackharp on May 06, 2023, 07:41:03 AM

Photo

Title: Re: Driver Testing Error
Post by: Lowercase on May 06, 2023, 08:25:50 AM

Looks like you are missing the 4.99KΩ 1⁄8W resistor in the R3 position on the A side of the board. Last step on page 56. That should resolve it.

Also noticed some of the joints might need a bit more solder too.

Title: Re: Driver Testing Error
Post by: blackharp on May 06, 2023, 09:48:17 AM

Thank you!! That worked.