Need some help, fuse blows

[jflorek]

Tried it with the tubes installed.  Fuse (1A) does not blow.  Unfortunately, the tubes do not glow.

[Doc B.]

I'm seeing something here that happens fairly frequently on the forum. PB asked you to try just the 12AU7 and you responded that you tried something different, both tubes installed. I guess it happens because we are sometimes not precise about what we are suggesting (this long distance troubleshooting stuff is without a doubt tricky) or maybe suggestions get read in a hurry. If you can go back and try what he suggested - just the 12AU7 tube installed - it may offer some useful info.

[jflorek]

Thanks for the clarification.  You are correct.  I read more into the answer than was there.  I will try with just the 12AU7 tube istalled and let you know results tomorrow.  Thanks again for the support.   

[jflorek]

Ok.  I tried with just the 12AU7.  No glow.  No voltage on the 6,7 and 9,10 pins/spades on the transformer.

[Paul Birkeland]

Ok.  I tried with just the 12AU7.  No glow.  No voltage on the 6,7 and 9,10 pins/spades on the transformer.

Is the fuse still in-tact?

[jflorek]

yes

[Paul Birkeland]

Set your meter to AC voltage, then measure the AC voltage between power transformer terminals 1 and 2 with the amp plugged in and switched on.

-PB

[jflorek]

Meter set to AC, reading across pins 1 and 2 about 107

[Paul Birkeland]

Meter set to AC, reading across pins 1 and 2 about 107

Are you in Japan?

If you perform this same measurement and get no voltage between terminals 4 and 5 on the transformer, as well as terminals 9 and 10 on the transformer, then it's possible that you accidentally cut one of the wires that goes from terminals 1 or 2 on the transformer into the actual body of the transformer. 

This can be repaired with a scrap of wire and some solder if this is the case.