Bottlehead Forum
Bottlehead Kits => Legacy Kit Products => Stereomour => Topic started by: astroimage2002 on October 22, 2010, 03:33:39 PM
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Hi All,
I am hoping that someone can help me out. I am trying to fire-up my fresh built Stereomour and have a problem. I am checking the resistance at the terminal strips using an auto ranging meter. I am concerned that the readings are not coming out as described in the manual and need some help figuring out what the reading mean. Here are the readings that I have:
1-373; 2-11.45; 2-0; 4-248.3; 5-1.506; 6-7.1; 7-8.3; 8-6; 9-7.5; 10-6; 11-136.8; 12-249; 13-0; 14-11.94; 15-368; 16-1.192; 17-360; 18-96; 19-343; 20-9.78; A1-132.3; A2-; A3-248.4; A4-1.212; C1-0.218; C2-; C3-249.5; C4-0.318
My concern (I think) is 16/17/18/19/20/C1/C3 . Can someone give me some guidance as to where I have miss-wired my Stereomour?
Brian
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Brian,
It is best, to get the widest assistance, to post the transformer terminal number terminal number or tube pin number, the reading you get and the expected reading. Otherwise only those with a Stereomour can help. There are only a few Stereomours out there.
Sadly it is difficult to produce columns in a post.
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Your right Grainger49. I will rewind and reform my question after I get a better grip on your comments so I can say something that means something to more readers. Please excuse a Noobie... I am trying :) and having a blast!
Brian
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Brian,
You only need to post the measurements that are more than 15% off the expected. That is 15% lower or higher than what is in the resistance checks.
The columns should be like this. You have to use the space bar, tabs don't work:
Measuring point Expected Measured
Terminal T1 100k ohm 50k ohm
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Hi Grainger49,
I definitely appreciate your input. It forced me to think about the issue and review all of my work. I think that I have found the problem after rewiring both of the secondaries... I did find a broken wire and a total screw up on my part. I mounted miss-matched resistors when I built the Power Supply PC Board AND when I put together the "other side". My bone head mistake.
I thank you for your suggestions on how to better convey my problem and will abide by them if I have any further problems like this.
Many thanks!
Brian
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Brian, I am also doing my first build with the Stereomour and also had trouble with the resistance readings. It sounds like you found your problem. My only other observation is that I completely ignored any terminal reading designated with the '*'. I couldn't get a consistent or meaningful reading for those terminals. Good luck and I'd be interested to hear how you are progressing.
Steve
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shcaz,
The kit was up and running last weekend. As I noted previously in this thread, the biggest issue me with the resistance readings was that I miss-matched the wire wound resistors on the power supply board and between terminal points 6/16 and 10/20. The two sets were miss-matched. Tracking down that issue I found a broken wire on one of the secondaries. After those two issues were fixed the readings fell where they should be.
The only other issue that I had was that I had the power tube sockets rotated 180 degrees. Paul does a much better job explaining the problem in another thread that I started about AC readings. I suggest that you find it and give it a read... It is titled "AC Voltage Reading Problem"; Paul explains how the socket should be rotated. A MUST read.
Brian