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Old 8th July 2006, 12:56 AM   #11
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Default Thanks Chris...

That makes sense, I'm glad I asked!

I'm going to get a better soldering iron (mine is a sledge-hammer) and give it a shot.

Thanks again. I don't mean to be so long before responding but I run a horse farm which keeps me a little occupied

Thanks again and I promise (sometime soon) to respond and tell you what happens...

Best Regards,
Tom
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Old 8th July 2006, 01:01 AM   #12
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No problem, and it is nice to have a little feedback on how things turn out

If you're not a skilled hand at soldering/desoldering, dont' be shy to use google to look up a few tutorials. They can take you a long way and certainly help prevent any mishaps.

Cheers,
Chris
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Old 9th July 2006, 01:14 AM   #13
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Default Not to worry mate...

Neither shy, nor too proud to seek help. I have (per your lookup advice) determined I need better tools.

Muhahaha, more skills lie ahead!

Almost killed myself on the tractor today! Coulda got my roll-it-over-and-die club membership card. Messing with amps is all good...

Bob's your uncle laddy, mine too...

Dang, another edit. I just wanted to say that I read all your posts, and despite the evidence - and between dropping trees and trying to stay alive I am learning something...

Thanks.

Humorous regards,
Tom
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Old 9th July 2006, 07:16 AM   #14
lucpes is offline lucpes  Europe
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Will this fit as a replacement for the small snubber caps?

http://uk.farnell.com/jsp/endecaSear...=9692606&N=401
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Old 11th July 2006, 08:07 PM   #15
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Hi,

Looks like it would fit but it may have too low an impedance for this job. Check what the stock cap had, could be something like five to ten ohms.
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Old 29th October 2006, 12:17 AM   #16
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Default Another cooked UcD180

Hi Everyone

Borrowed a friends UcD180 for a listen - liked what I heard overall - fantastic focus, imaging/depth and clarity. Perhaps a little steely and the bass a titch light in the low octaves but he was only using a single 300VA for both channels. He had a 50k pot in the circuit as a volume control which I removed. The whole thing was put together with 'blue tack' (yeah I know, dodgy!) and anyway the long and short of it is that when I removed the pot for listening direct from my pre and then replaced it before giving it back, the pot moved in the blue tack and it looks like one of the leads came off/and/or shorted to one of the others...pretty embarrassing all around - I've paid for his replacement and I'm the lucky owner of a fried UcD180...

From what I can see both D2 and T2 have fried. Not sure what specs D2 is, and T2 looks like it says 2907A.

Everything else looks oK.

Are these parts available readily, and does anyone know what I can use for D2?

Cheers, Kendrick
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Old 29th October 2006, 08:35 PM   #17
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Default I am completely amazed!

ClassD4Sure...

I know it's taken forever but...

I finally got around to soldering out the blown snubbers on my "cooked" UcD180's (as you suggested) and giving them the two-second test.

By God, both of them worked!!!

Worse than that, actually, I actually blew four of them up and all four work without the popped snubber!

(same mistake four times? absolutely tragic!)

Right on!

More than I could have imagined was possible.

Thank you endlessly.

Now the question is how do I get less than 1000 of the required replacement cap...

Just as a side note I was soooo careful with the replacement 400's and they work splendidly.

Learning is expensive but it looks like I've caught a break. Imagine that, idiot proof modules.

Thank you Bruno...

And thank you Chris.

[edit] Seriously tho...

I am having trouble locating replacements. It looks like I have two different versions of the UcD. The caps are different. Is this a problem or can I order the same sets of caps (from where I do not know) for all the blown modules?

Best regards,
Tom
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Old 29th October 2006, 10:26 PM   #18
lucpes is offline lucpes  Europe
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For the snubber capacitors use a general purpose version - no low esr types here - from a good brand (say BC components, Vishay, Panasonic, Nichicon, ELNA, Rubycon, SANYO). Value is 22uf/100V or something like that as far as I remember.
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Old 29th October 2006, 10:33 PM   #19
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Default Thank you lucepes...

Is someone like Mouser a good bet?

Regards,
Tom
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Old 30th October 2006, 12:20 AM   #20
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My UcD 180s are version 5, and all the 22uf 63V caps (including C35) are these - so nothing special apparently!
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