Author Topic: Newly calibrated LC102 or LC103 owner, need help for calibration parts  (Read 932 times)

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Offline liysTopic starter

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  • Country: id
Hi new member here from Indonesia, just bought a LC102 from ebay, price was ok, in working condition but unknown calibration state.  Short test fail at the beginning, but the short relay was easily opened, but the cleaning wasn't an easy one.  Tried contact cleaner, alcohol, nail polish, nothing works, at the end I had to sand the relay contact with #1000 sanding paper which is only then it pass the test.  Tested lots of caps, no problem, only I don't know if it's accurate or not.  I think really need to calibrate it and so here I am needing the calibration parts, as those parts that comes  with 0.25%, 5% and others are not available at mouser, time or even aliexpres.  Any of you guys here who has a newly calibrated LC102 or 103 from a known professional calibration company or probably parts measured from a known good calibrated meters, want to sell a set of calibration parts for LC102 owners? I'm sure others will find them useful too. Please let me know, thank you so much.
 

Offline coromonadalix

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Re: Newly calibrated LC102 or LC103 owner, need help for calibration parts
« Reply #1 on: October 31, 2021, 12:57:57 pm »
have you began some checks with this sheet --- attached document

some documents here : https://bama.edebris.com/manuals/sencore/lc102/

or i have uploaded them there : KO4BB  website

and a thread there : https://antiqueradios.com/forums/viewtopic.php?f=8&t=368687&start=20

There's some thread here too, a simple search  would provide you the same posted links  i've made


phrase taken from  antique radio

The LC102 is easier to calibrate on capacitance compared to the older units like LC53, LC75, and LC101. You only need two capacitors for calibration (1500pF and 1.2uF). With the LC103, you need a special rig setup...
« Last Edit: October 31, 2021, 01:03:32 pm by coromonadalix »
 

Offline liysTopic starter

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  • Country: id
Re: Newly calibrated LC102 or LC103 owner, need help for calibration parts
« Reply #2 on: October 31, 2021, 04:27:55 pm »
Thank you for the reply, yes I've seen those docs at bama and download and read some even before I get my LC102 and that calibration procedure from sencoretech as well. 

No problem with my unit, the error on short test has been fixed.  My only need right now is the precision caps needed to calibrate it. The procedures call for some super low tolerance parts, here is where the problem is, I couldn't find them.  I figure, if I can get those parts from anyone who has a professionally calibrated lc102/LC103, as long as I can dial the value matches the value shown on the calibrated unit, mine would probably be as accurate as his, ok maybe a bit less :D
 


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