Ok, so on 'shorted' board you'll have to replace LM317, possibly transistor,zener and LM318.
On C102/C202 what voltages do you measure?
The 'good' board measure like my pic? If so it's fine and you can try it.
LOVE the toothpick idea!
Ivan,
Stick with it. It may not feel like it, but you are getting there. All of us have been where you are a sometime. Everybody on the thread is behind you. I just wish I could offer more help on the diagnostics.
Jac
Sorry
102 value is 14.1
202 value is 3.6 and swinging (initially it is 7 or so, but keeps dropping till 3 or maybe lower- I did not wait that long)
Where? On C102/C202?
Ivan, please, be more precise
102 value is 14.1
202 value is 3.6 and swinging (initially it is 7 or so, but keeps dropping till 3 or maybe lower- I did not wait that long)
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Fine, so if that board has a low DC offset you can use it.
Ok, for sure LM317 have to replaced and probably also the BC640-16 and zener.
I would buy also a LM318 just to be sure you have it at hand.
Thank you !
I ll order parts . Probably it has to be ebay or something with low delivery costs .. does anybody know a good source apart mouser ?
uk.farnell.com
Geoff
Just fired up the amps. First try was through dim tester with 60 W bulb. The light became dim after a mild flash. When amps were plugged directly into the wall socket outputs showed 2.8 and 4 mV DC. Now keeping fingers crossed for Ivan to overcome the problems and succeed with the build! Hope to report sound impressions soon.
Attachments
Really good values
Good work.
Keep us informed (and twist secondarily wires... ;-) )
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