News:
October 05, 2022, 04:26:31 AM

Author Topic: Crackatwoa  (Read 2032 times)

0 Members and 1 Guest are viewing this topic.

Offline mwhouston

  • Newbie
  • *
  • Posts: 4
  • retro-thermionic - all things DIY
    • retro-thermionic
Crackatwoa
« on: July 02, 2016, 04:46:16 PM »
I have assembled two basic kits for others and now this Crackatwoa for one other. I have finished but two LEDs  on one high current brd. don't light. Also it appears the voltages on the low current brd. are not correct.

I did the resistance check and all is good. I have buzzed out the wiring and again all is good.

Here are the voltages;

Low current brd.

1A 150V
OA 68V
KregA 5V
BRegA 209V

1B 211V
0B 70V
KregB 1.2V
bRegB 148V

High current brd (two LEDs not lighting);
1A 190V
0A 212V
bA 0V

1B 0V
0B 114V
bB 211V

I need help. Thanks
retro-thermionic - "Simply a cool design"

Offline mwhouston

  • Newbie
  • *
  • Posts: 4
  • retro-thermionic - all things DIY
    • retro-thermionic
Re: Crackatwoa
« Reply #1 on: July 03, 2016, 02:37:49 PM »
Have I posted this in the right place for assistance?
retro-thermionic - "Simply a cool design"

Offline mwhouston

  • Newbie
  • *
  • Posts: 4
  • retro-thermionic - all things DIY
    • retro-thermionic
Re: Crackatwoa
« Reply #2 on: July 03, 2016, 07:42:54 PM »
The problem was a broken pin on one of the 6AB5s. The pin was slightly bent out of the box but must gave fractured on insertion. In six boxes of tubes, three of them with very old tubes, I have three. Two are NOS and one well used. The amp is up and going with all voltages spot on.

I guess this proves my build was fault free, just a dodgy tube let me down. Amp sounds good. 
retro-thermionic - "Simply a cool design"

Online Doc B.

  • Administrator
  • Hero Member
  • *****
  • Posts: 9146
    • Bottlehead
Re: Crackatwoa
« Reply #3 on: July 05, 2016, 08:35:31 AM »
Quote
The problem was a broken pin on one of the 6AB5s.

You mean 6AQ5, maybe?
Dan "Doc B." Schmalle
President For Life
Bottlehead Corp.

Offline mwhouston

  • Newbie
  • *
  • Posts: 4
  • retro-thermionic - all things DIY
    • retro-thermionic
Re: Crackatwoa
« Reply #4 on: July 06, 2016, 07:30:27 PM »
Correct a broken pin on the 6AQ5. Replaced the tube and amp works perfectly. I'm hoping BH will send me a new tube.
retro-thermionic - "Simply a cool design"