Bottlehead Forum
Bottlehead Kits => Legacy Kit Products => Stereomour => Topic started by: dingwersen on October 07, 2014, 08:35:58 PM
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I Built my Stereomour about 3 years ago, no problems with the build, followed the directions step by step and with a little beginners luck (and some great direction) had a functioning amp. The only "problem" that I could see was a dead spot in the volume pot. This was a bit hi of my normal listening range so I chose to ignore it. I have been driving a pair of old Klipch Heresy's and my rather pedestrian ears have been quite happy.
One day I went for a listen and there was no sound from the left channel. An examination led me to find that the left tube had a foggy discoloration on the inside bottom, near the Bak-o-lite base of the tube. I figured the tube had "worn out" so I bought a new pair of the same brand and plugged them in and still no sound from the left channel.
I am a bit stumped, I'm not an "electronics guy" per-see, but I'm pretty handy and am fine with doing my own research, if someone could just point me in the right direction.
Thanks in advance,
Dan
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The first step is to take the resistance measurements. Take the tubes out. Post any that are greater than +/- 15% from the manual.
If the resistance is good move on to the voltage measurements. Tubes in. Again post those outside the 15% range.
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An examination led me to find that the left tube had a foggy discoloration on the inside bottom, near the Bak-o-lite base of the tube.
If there was a white fog at the bottom, the tube lost its vacuum and is indeed dead.
If you're still missing a channel, I would start with a voltage check.
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Thanks to both of you.
I am going to try the voltage test as suggested.
I recently moved and have yet to come across my manual. I may have to get another. I'll post back in a week or two once I have done a bit more reading and testing.
Thanks again,
Dan