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#1
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I have a couple questions about this before I mess with with this set. Luckily I do have a variac and plenty of meters so this shouldn't be too bad. Anyways I am not sure how to put the meter in series with the AC line. Am I hooking the positive lead to one side of the AC line, and the Negative to the other? I am afraid of blowing the meter honestly. Also I am a bit confused what you mean by "95%". Do you mean that it's a 95% chance that is the issue? May be a stupid question but I am trying to not miss a single detail in the instructions to ensure the right results and to avoid damaging anything. Also not sure if this helps but this set is 19". |
#2
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I believe you're right about the 95% probability part, I can't imagine it meaning anything else. |
#3
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Yes 95% chance thats the area of problem.
The meter goes in series with the line. In other words you are cutting one of the wires & inserting the meter. Its a very common process so make up a little test jig. If you happen to have a Sencore "Power Right" everything is there for you, isolation, variac & metering. Great to have but still costs $$ used due to its many uses. 73 Zeno LFOD! |
#4
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Instead of cutting the wire I will unsolder the live side and connect everything there. Eventually a test rig will be made but I just have to find all the parts around here and something to mount them in/on. I am a bit afraid of frying my meter but first I will try this with a junk meter, then move to the better meter.
I looked on the internet at those Sencore units and saw one for over $400. It sure is a nice unit though. I will keep an eye out locally for a unit like that (I've got many C-list adds looking for this stuff). Locally not too much has shown up but what has shown up gets used almost every day. I'll update this once I get everything set up and tested. The owner would love to have this set back and I wouldn't mind the extra bench space. |
#5
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On my meter the jack for testing current draw is fused so nothing to worry about. I would rather avoid blowing the fuse though, those I need tend to be unavailable locally. Keep your eye on the listings, 4 bills sounds like a pretty common gouging for one of those units. Fortunately I found a nice one for a decent price when I had some extra scratch come in, around 3 bills shipped in early 2015, and even then the cross-border shipping prices were pretty bad. I'll probably still make a test jig for my meter though as that measures current draw up to 10A. |
Audiokarma |
#6
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So I just tested the tv and the amp draw is 1.5 amps roughly. When I saw that I smacked the emergency kill button on the variac to avoid damaging anything. I have had units cook in the past to hopefully this set is okay. Even if a fuse is blown on a meter sometimes you have to get another one. I blew a fuse in my craftsman meter and that caused it to become wildly inaccurate with resistance tests and now on some setting instead of reading "0.00" it always gets a reading. Maybe that's just the nature of this particular meter when it gets damaged, but I have been warned about fuses protecting a unit too late. I will certainly keep an eye out for one of those. I am trying to get a bunch of tv repair equipment Saturday from someone with bulk. Maybe a hidden gem will be in there. Dang I hope so. |
#7
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Quick update here, there are already some bad parts.
On the heatsink there are two transistors, a 2sd555 and a STR30125. The 2sd555 is obviousally bad, and the STR30125 seems to have taken damage since the collector reads as 711 ohms, and the emitter reads as 2850ish ohms. From what I can tell both of these parts are part of the HV section. So far I haven't found any other dead parts which is odd. It is also odd that the fuses did not blow. They are covered in heavy dust so it is obvious they have not been replaced. |
#8
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I think it's likely you'll get some good stuff out of that bulk deal, assuming you're in the US. I got my modest selection from US sellers, it's a lot harder to find that stuff North of the border, especially in my region. I wouldn't expect much from a Craftsman meter, especially a newer one. I use a Fluke 77. Last edited by Jon A.; 07-26-2018 at 06:43 PM. |
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