The Electronics Universe
Electronics Forum => Equipment Review => Topic started by: km4gig on March 29, 2017, 12:38:54 AM
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Hey, Buddy,
Jon here. Last weekend I became the proud owner of a Transel Transalyzer MarkIII. I just have to repair a couple tube CB amps in exchange for it. Pretty good trad if you ask me.
Anyway, I hooked it up to a couple different radios and all I get is the watt meter will swing, but the scope just remains a straight line trace. It doesn't seem to be sensing the carrier or modulation at all. I opened it up and had a peek, but without any kind of schematic or service manual, I'm a little bit lost. The only documentation I've found is the instruction manual for the MarkIIIa in the bama archive. Any ideas where to find a schematic or better documentation?
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Hey Jon. Can you post up some pictures. Don't think I have ever heard of this unit. Although there are several brands on the market that do this. Check the attenuation switch. Chances are someone put to high od power into it and took out the attenuator. The watt meter should be direct coupled while the scope will have an attenuation pad between the input and scope plates.
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Here's a YT video but it's pretty dark
https://www.youtube.com/watch?v=JEf3L2XsPWM
Strange thing, it seems to work now ... all I did was began tracing through the signal with my scope.
Anyway I'm still looking for more documentation if I can find it.
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More pics
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I bet Mike at Mikes Radio Repair may have something. I will check.
Nice looking unit BTW.
So it had an intermitted problem...
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Either an intermittent problem or operator error :o. I was at my brother's house at the time and didn't spend a lot of time troubleshooting at that time.
Now it's time to recap.
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Looking closer at the documentation it does outline calibration procedures and gives a block diagram. There's no schematic, but I should be able to manage.