Help, voltage problem!

[smallmany]

resistance of 600k ohm on terminal 13 , it is above the 270k but it varies with ohmmeters right?

[Doc B.]

The difference may be due to the fact that the tubes haven't burned in yet. Just enjoy some music for a while and see if the imbalance gets better as the tubes break in.

[Paul Birkeland]

resistance of 600k ohm on terminal 13 , it is above the 270k but it varies with ohmmeters right?

Yes indeed.

[smallmany]

Since tubes degrade faster the hotter it gets, is it possible to add a heat sink to deviate the heat away?

[Paul Birkeland]

Since tubes degrade faster the hotter it gets, is it possible to add a heat sink to deviate the heat away?

There is a range where a given tube will operate well.  If you go too high, you will indeed shorten the life of the tube, if you go too low, you get poor performance out of the tube.  We are running the 6080 at about 25% of its maximum dissipation rating, so there is nothing to be concerned about here.

[smallmany]

What areas of the crack controls the sound quality of the left audio? Im still not hearing any changes to the recessed/less prominant left side of the headphone. I know that it is not my source/headphone because without the amp it is perfectly balanced, and switching the rca connector reverses the sound quality so it must be the amp itself

[Paul Birkeland]

and switching the rca connector reverses the sound quality so it must be the amp itself

So switching the cables that come into the amp moves the recessed quality to the other channel?

[smallmany]

Yes    the lesser stellar sound stays on to same channel.

[Paul Birkeland]

Yes    the lesser stellar sound stays on to same channel.

That would be a "no", the stellar sound does not switch channels. 

How are your voltages?

If this doesn't clear up in 50-100 hours of operation, I would look at rewetting any solder joints that don't look shiny. 

[xiawei]

Have you solved the problem yet? I have similar problems.

[smallmany]

Not yet, but i'll be taking PB's advice and rewet some joints. Will post an update if it improves performance.

[Doc B.]

If you can please post any  voltages that are out of spec we might be able to offer some more ideas about what to look for.

[smallmany]

ironically, I blew my fuse doing a voltage test. Once I replace those, i'll get on it Doc.

[smallmany]

will this fuse work

1A 250VAC
Type number:MFG
5.2mm x 20mm

interrupting current : 35 A 250VAC
miniature fuse


1   80
2   175
3   0
4   175
5   80
6   0
7   103
8   0
9   104
10   0
11   0
12   0
13   175
14   0
15   196
20   0
21   219

A1   80
A2   0
A4   0
A5   0
A6   80
A7   0
A9   0

B1   80
B2   175
B3   103
B4   80
B5   175
B6   103
B7   0
B8   0

[smallmany]

will it harm my headphone/amp in anyway, if i maximize the volume on the crack amp and control the volume via computer?