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Post by Mr Whippy on Mar 13, 2015 21:46:47 GMT
The regulator contacts in the socket. I was going to suggest taking them out and putting them back in - you could do this just to renew contacts on both. You can prise them up a little with a screwdriver and push back in again. But if it's ok now…
Anyway - it's working!!
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Post by MartinT on Mar 13, 2015 22:11:56 GMT
Did the regulator board have a contact to earth through the chassis or a mounting post?
EDIT: snap! |
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Post by Deleted on Mar 13, 2015 22:35:41 GMT
Seems plausible. The funny thing is I had to give the regulator a good going overt to get the sticker off and was scared of damaging it! Looks like I have managed to get the contacts working again  |
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Post by istari_knight on Mar 14, 2015 8:36:00 GMT
Bonus !
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Post by Mr Whippy on Mar 14, 2015 11:50:42 GMT
Team work! With major credit going to James, I think.
Can't beat that glow of self-satisfaction, can you! Not to mention the savings in repair costs.
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Post by Deleted on Mar 14, 2015 12:00:58 GMT
Too right! Ive really enjoyed the process and really appreciate the friendly and genuinely helpful Posts from everyone. I now have a spare set of regulators on their way, which I will keep in case the problem returns. I have an amp I love that is re-capped and sorted with new rectifiers too.
If anyone out there reading this is similarly clueless with Electronics, I hope they are encouraged to join, learn and contribute.
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Post by istari_knight on Mar 14, 2015 16:09:55 GMT
Team work! With major credit going to James, I think. I don't know about that... Nothing I suggested worked  Still, happy days you don't have to take it down the repair shop. |
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Post by Deleted on Mar 14, 2015 17:31:38 GMT
I have picked up loads of knowledge (compared to what i knew before:zilch!) thanks to your contributions and those of others. I have also started dabbling and enjoyed it a lot |
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Post by MartinT on Mar 15, 2015 15:59:24 GMT
Now that it's up and running, how does it sound?
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Post by Deleted on Mar 15, 2015 17:30:48 GMT
Ii am relying on memory to an extent but it's the best Exposure amp I have owned. I have a 6/7/Dual 4 which should be better, but it isn't even close. Would it be better than a 3/9/Dual 4? I've had a couple of those combos and I think it is. The Frame transformer in this earlier model is the main physical difference but the amp seems to be more organic and also more agile.
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Post by istari_knight on Mar 15, 2015 18:13:12 GMT
The Frame transformer in this earlier model is the main physical difference but the amp seems to be more organic and also more agile. Many of us bodgers *ahem* DIY'ers sorry have discovered the average toroid is not the best choice for amplifier power supplies. EI or R core is where its at unless the toroid is pretty special... I cannot explain it but thats what my ears tell me, many others have found the same. |
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Post by MartinT on Mar 15, 2015 19:59:44 GMT
It seems that the Japs agree. Many of their statement amps use huge E or R core transformers.
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Post by Deleted on Mar 15, 2015 20:46:14 GMT
That's really interesting and it's something I didn't realise. I have enjoyed a lot of amps with the Holden and Fisher transformers, Exposure amongst them. The fact this old timer sees them off is an eye opener, I have also had Bedini and McIntosh amps that also used frame transformers. Both were also excellent.
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Post by southall1998 on Mar 15, 2015 20:48:42 GMT
Very interesting!
S.
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Post by Mr Whippy on Mar 15, 2015 20:58:58 GMT
It seems that the Japs agree. Many of their statement amps use huge E or R core transformers. I was going to say that, but I've been too busy doing the washing. Decades ago Hi-Fi Answers did an item on the subject and it was mentioned the Japanese had a preference for frame types. As to why, I can't recall if a reason was arrived at. Tora Tora Tora torroids have a lower radiation field and are more efficient at power transfer and so couple crap more effectively, probably, but I imagine there's more to it than that. Me old Amstrad has one. So maybe Alan S knew more than he was letting on. There could also be changes in the circuit design that account for some of what you're hearing. Old McDonald used them too: EI. EI. O… |
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Post by istari_knight on Mar 16, 2015 21:13:03 GMT
Its certainly an interesting subject... To me at least ! Pretty much the only Japanese company to use lots of toroids is Sony who've used them in nearly every proper amplifier since the late 80's / early 90's. Is it a coincidence they are [or at least were] arguably the most popular Jap amp manufacturer in the west ? One thing I am certain of though, Alan.S knew bugger all Whippy  |
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