Bottlehead Forum

Bottlehead Kits => Legacy Kit Products => Quickie => Topic started by: denti alligator on June 28, 2017, 12:03:45 PM

Title: Quickie on the fritz-- help needed
Post by: denti alligator on June 28, 2017, 12:03:45 PM

Quickie 1.0 with PJCCS has been running fine for many months. Today it stopped. Voltages  for left channel are off. I'm not getting anything at A7, for instance. Shouldn't I be getting some voltage from the D battery? Could it be that the battery holder is not working? (It looks fine.)

1  0
2  0
3  0
4  1.864
5  0

6  18.93
7  28.42
9  9.48

A1  0
A2  37.8
A3  0
A4  37.7
A5  0
A6  37.8
A7  0

B1  3.34
B2  26.08
B3  0
B4  26.25
B5  1.865
B6  26.20
B7  3.34

PC board
A1  37.9
OA  29.19

B1  37.9
OB  37.6

I've reflowed most of the joints, swapped out tubes, and changed batteries.

Title: Re: Quickie on the fritz-- help needed
Post by: Paul Birkeland on July 02, 2017, 09:30:31 AM

Measure the DC voltage on the offending channel between pins 1 and 7 on the tube socket itself.  That will tell you if the 1.5V D cells are heating that tube.

Title: Re: Quickie on the fritz-- help needed
Post by: denti alligator on July 02, 2017, 04:15:05 PM

I went to do these measurements and everything seems to be working fine. Very, very strange.

Title: Re: Quickie on the fritz-- help needed
Post by: Paul Birkeland on July 07, 2017, 09:30:38 AM

You likely moved an intermittent connection that needs a little more heat from the old soldering iron.

-PB