Resistance check failure [resolved]

[Jburrows]

Just finished my Stereomour II build. Tried to do a resistance check, but I am getting no readings at all anywhere. Where do I go from here?
Obviously, I’m a new customer.

 

[Jburrows]

After rechecking I am getting some results.
Terminal 4 : 144
6 : 1.19
15 : 0
17 : 0
21 : 1.36
22 : 1.98
24 : 1.64
25 : 1.55

That’s as for as I’ve gotten so far

 

[Paul Birkeland]

What are the units on those numbers?

 

[Jburrows]

What are the units on those numbers?

The setting on my Klein was 2M ohms

 

[Paul Birkeland]

The Klein is a pretty annoying meter to use for this kind of work. It's really made for residential electrical work. This works a bit better and costs less.

If terminal 6 is 1.19M Ohm, that's a problem. If it's 1.19 Ohms, that's not a problem.

15 shouldn't be zero, definitely don't turn this amp on and post some build photos ASAP.

 

[Jburrows]

Spent today going over every solder. Did a lot of re soldering. At the end of the day the resistance numbers I got are all well within your 10-15% acceptable range. I also agree the Klein is not the best for this.
Thanks for your help.
FYI, terminal 6 is 1.1 Ohm today

 

[Jburrows]

All resistance and voltage checks came out perfect. Put in the tubes and tried it out. Sounded fantastic, but none of the tubes glow. Re soldered the connection on the EIC, but still no glowing. Although it seems to be working well, I don’t want to damage anything, so I shut it down. I’ve attached some pics of the build. Hopefully you can give me some direction.

 

[Paul Birkeland]

All resistance and voltage checks came out perfect. Put in the tubes and tried it out. Sounded fantastic, but none of the tubes glow.

If the voltages are good and the sound is good, the tubes have to be glowing. They don't glow super brightly, so you may need a dark room to be able to see that they are glowing properly.

-PB

 

[Jburrows]

If the voltages are good and the sound is good, the tubes have to be glowing. They don't glow super brightly, so you may need a dark room to be able to see that they are glowing properly.

-PB

Excellent! Thanks for the quick reply. The sound is far better than I imagined it would be!

 

[Jburrows]

Excellent! Thanks for the quick reply. The sound is far better than I imagined it would be!

Excellent! Thanks for the quick reply. The sound is far better than I imagined it would be!

All resistance and voltage checks came out perfect. Put in the tubes and tried it out. Sounded fantastic, but none of the tubes glow. Re soldered the connection on the EIC, but still no glowing. Although it seems to be working well, I don’t want to damage anything, so I shut it down. I’ve attached some pics of the build. Hopefully you can give me some direction.View attachment 35282View attachment 35283View attachment 35284View attachment 35285View attachment 35286View attachment 35287View attachment 35288View attachment 35289

Now a new issue, no output on the left channel! Was working fine yesterday, and this morning. Flipped it over to see about the tubes not glowing, but when I put it back this afternoon to enjoy it, NO LEFT CHANNEL. Can you give me some direction? Thanks_

 

[Jameson]

Start at the top with some resistance and voltage checks. It’s almost definitely a cold solder joint if it was working and now it’s not after you moved it.

 

[Jburrows]

If the voltages are good and the sound is good, the tubes have to be glowing. They don't glow super brightly, so you may need a dark room to be able to see that they are glowing properly.

-PB

Start at the top with some resistance and voltage checks. It’s almost definitely a cold solder joint if it was working and now it’s not after you moved it.

I’m afraid you’ll have to be more specific with me. My first build, and I’m really sort of helpless with this stuff. I did recheck all the voltages described in the final check, and they were all good. If you’re referring to different places, I need specific locations. Thanks for your help.

 

[Paul Birkeland]

You can get some cheap speakers and play music into the amp with it flipped over (use a couple of stacks of books to support the sides of the chassis plate while it's flipped over), then poke around with a wooden chopstick. When you find the problematic solder joint, you should be able to restore the lost channel by poking at it. Definitely don't forget that output transformer wiring can cause a channel to drop like this, so be sure to poke at those terminals too.