Bottlehead Forum

Bottlehead Kits => BeePre => Topic started by: Raymond P. on November 09, 2018, 10:47:40 AM

Title: Bad 6𝜋14𝜋 tube? [resolved]
Post by: Raymond P. on November 09, 2018, 10:47:40 AM

Hi,

So I completed my BeePre build and passed resistance checks. Then I plugged it in and noticed that the two LEDs on the A-side of the right channel C4S board were not lit. I proceeded with the voltage checks and found these nodes to have incorrect values. (btw, all tubes glow.)

T6: 188V (should be 146V)
T10: 190.8V (should be 186V)
C3: 1.23V (should be 3.5-4.5V)
C7: 188V (should be 147V)
C9: 188V (should be 147V)

Suspecting the right channel 6𝜋14𝜋 tube wasn't conducting, I swapped it with the left channel to see if the bad readings followed. Sure enough, they did, as well as the two non-lit LEDs. I then pulled the problematic tube to clean the pins, but that didn't help.

Should I go ahead and ask for a replacement?

Thanks!

Title: Re: Bad 6𝜋14𝜋 tube?
Post by: Paul Birkeland on November 09, 2018, 05:18:37 PM

If the issue follows a tube, then that would indicate that a replacement is in order. 

-PB

Title: Re: Bad 6𝜋14𝜋 tube?
Post by: Raymond P. on November 09, 2018, 07:30:40 PM

Ok, thanks! Replacement request sent.

Title: Re: Bad 6𝜋14𝜋 tube?
Post by: Raymond P. on November 24, 2018, 03:17:18 PM

Quick update. Got a replacement tube (thanks @fullheadofnothing), plugged it in, and the BeePre passed the voltage tests.