Resistance Reading Problem

[astroimage2002]

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

 

[Grainger49]

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.

 

[astroimage2002]

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

 

[Grainger49]

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

 

[astroimage2002]

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

 

[shcaz]

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

 

[astroimage2002]

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