acrosound at Yahoo! Groups

Re: Has anyone made replacement UL-II boards yet???

Heather Carr-Rowe — Wed, 23 Jan 2013 16:05:42 GMT

Very true that point to point is superior. Far easier to troubleshoot, upgrade, or repair as well. Implementing it in a properly laid out manner would be the

Re: Has anyone made replacement UL-II boards yet???

Jeffrey Medwin — Wed, 23 Jan 2013 15:26:46 GMT

I am not familiar with your Ult II amp, but my general opinion is its worth while to use a RadioShack perf board, and re-do these ACRO circuits in REAL WIRE

Re: Has anyone made replacement UL-II boards yet???

Heather Carr-Rowe — Wed, 23 Jan 2013 14:59:37 GMT

I've wondered the same thing Kent. With the Ult II a new design using 12BH7 or 6CG7 instead of 12AU7s would be the way to go. I actually queried the guy who

Has anyone made replacement UL-II boards yet???

Kent — Wed, 23 Jan 2013 05:59:09 GMT

Hi folks- With all this talk about 20/20 amps and re-made boards, I'm surprised no-one has done the same with the UL-II. I asked a while ago on this thread,

Re: Replacement of TP-530 Power Transformer?

Henry platt — Wed, 23 Jan 2013 04:14:56 GMT

That's real nice work Jeff! ... From: Jeffrey Medwin Subject: Re: [acrosound] Re: Replacement of TP-530 Power Transformer? To:

Re: Replacement of TP-530 Power Transformer?

Jeffrey Medwin — Tue, 22 Jan 2013 16:55:25 GMT

Bernard, For me personally, on efficient speakers, triode connection is ALL "I" would ever use. I will work out BOTH Pentode and Triode direct couples

Re: Replacement of TP-530 Power Transformer?

Bernard Chu — Tue, 22 Jan 2013 08:16:19 GMT

Hi Jeff, I just received Canadian PCBs, they are work of art, best components, best soldering technique, I encourage everyone here acquire some, because it's

Re: Replacement of TP-530 Power Transformer?

Heather Carr-Rowe — Tue, 15 Jan 2013 21:39:43 GMT

Once you get the measurements back Jeff be sure to put them in the files section for easy future refernce ;^) Lar

Re: Replacement of TP-530 Power Transformer?

Jeffrey Medwin — Tue, 15 Jan 2013 21:01:06 GMT

Hi Bernard, Its not a power supply situation as much as it is a gross over dissipation of the rated maximum power levels of the output tubes, which leads to

Re: Replacement of TP-530 Power Transformer?

Valhalla — Tue, 15 Jan 2013 20:53:55 GMT

Hi Jeff, Following your advise, I've ordered a pair of Canadian PCBs for future stereo 20-20 project. Are you implying it sounds better in triode mode or just

Re: Replacement of TP-530 Power Transformer?

Jeffrey Medwin — Wed, 09 Jan 2013 14:55:24 GMT

Bernard, No, that is cute, *low volume has nothing to do with the way the output tubes are run.* :-) The output tubes are rated at (IICR) about 12 Watts

Re: Replacement of TP-530 Power Transformer?

Bernard Chu — Wed, 09 Jan 2013 13:55:24 GMT

Hi Jeff,Thanks for the info, that's what I am looking for, 175VAC secondary running 440VDC into driving board.Many power transformers I have in stock should be

Re: Replacement of TP-530 Power Transformer?

Heather Carr-Rowe — Tue, 08 Jan 2013 17:43:53 GMT

Get ahold of these guys. They do quality rebuilds, they can even make it better than the original: http://www.heyboertransformers.com/ Cheers Larry ... From:

Re: Replacement of TP-530 Power Transformer?

jeffreymedwin — Tue, 08 Jan 2013 17:17:41 GMT

... Hi Bernard, A fellow named Henry Platt and I are doing measurements on the stock Power Transformer and supply, ( see Post #242 ) and in a few weeks, we may

Replacement of TP-530 Power Transformer?

Valhalla — Tue, 08 Jan 2013 16:20:33 GMT

Hi all, I bought an Acrosound 20 (mono) in flea market with $60. Compact and cosmetically nice, but not powered up. I tested all parts, power transformer was