Re: Let me ask this

Posted by Jim McShane (D) on June 15, 2006 at 16:08:23

In Reply to: Let me ask this posted by Russ57 on June 15, 2006 at 14:56:19:

Hi Russ,

I would probably go for a Cit V type design first. That is somewhere between a "typical pentode class AB1 global feedback vintage amp" and the Cit II. Since I would never use a set of Cit II OPTS except on a Cit II, I have to look at the limits imposed by the OPT situation. Those aren't exactly off the shelf parts! And honestly, doing a Cit II from scratch would be tough unless I just copied it - I'm not sure I'm smart enough to use Stu Hegeman's approach on another amp if I have to start with a clean white sheet of paper!

Eli Duttman and I worked together to put together the "El-Cheapo" bargain basement amp that is written up over on the Decware site. Eli did much of the work, I chipped in some here and there - but I wouldn't change a thing Eli did (plus he's a smart cookie)! I did suggest the 12AT7 tube as the driver/PI tube. That will drive some folks crazy, because you don't have to search hard to find plenty of post saying the 'AT is a lousy audio tube. It has too much 2nd order distortion - which is exactly why I spec'd it out. The reason for me saying that is to point out that I don't like to do things the conventional way just because I can.

Also, I have (8) AVVT 300Bs sitting in my stash, just waiting for the day when I get time to build an SE amp. That's the same reasons I have about the same number of VT-4Cs...

I know, I'm all over the place. But with a few exceptions I prefer simple to complex, I have nothing against NFB PROPERLY used, I like voltage doublers (it allows low DCR secondary windings), I have nothing against tube rectifiers but for power stages I prefer SS - using good diodes.

I dunno, did I ever really answer your question? I tried, if I didn't maybe I can't!

Feel free to put me on the spot - I always enjoy hearing your views Russ.

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Follow Ups Full Thread

Topic - Rate the following, please ... - mikeyb 09:57:48 06/15/06 (26)

Thanks! - mikeyb 07:47:30 06/16/06 (0)

how bout eico hf-60? - zarniwoop 17:46:10 06/15/06 (4)

Re: how bout eico hf-60? - Sector-7G 02:16:46 06/16/06 (0)

The HF-60 is a fabulous amplifier but - MIchael Samra 20:58:08 06/15/06 (2)

why? - junkwaffel 03:48:49 06/16/06 (1)

Re: why? - MIchael Samra 22:02:33 06/16/06 (0)

Have had a number of these myself.... - doodlebug 16:27:39 06/15/06 (0)

Re: Rate the following, please ... - MJL 13:35:21 06/15/06 (5)

second the Deuce! - Sector-7G 15:03:50 06/15/06 (4)

Re: second the Deuce! - Jim McShane 15:58:11 06/15/06 (1)

mmmmhhhhh....Sweet! - Sector-7G 16:10:38 06/15/06 (0)

Do you like it better than your own amps? nt. - j rodney 15:36:41 06/15/06 (1)

Re: Do you like it better than your own amps? nt. - Sector-7G 10:26:04 06/18/06 (0)

Re: Rate the following, please ... By the way, misinterpreted your post - j rodney 13:17:12 06/15/06 (0)

none of the above - j rodney 12:19:29 06/15/06 (7)

Rodney..I cant believe what you just said - MIchael Samra 21:44:41 06/15/06 (0)

Re: none of the above - Jim McShane 14:25:55 06/15/06 (5)

Re: none of the above - MIchael Samra 23:24:30 06/15/06 (0)

My insults were not directed at you or any particular amp - j rodney 15:36:07 06/15/06 (1)

Re: My insults were not directed at you or any particular amp - Jim McShane 16:05:20 06/15/06 (0)

Let me ask this - Russ57 14:56:19 06/15/06 (1)

Re: Let me ask this - Jim McShane 16:08:23 06/15/06 (0)

Re: Rate the following, please ... - MIchael Samra 10:56:04 06/15/06 (1)

I forgot the cit 5 - MIchael Samra 10:59:33 06/15/06 (0)

Out-of Context Ratings are problematic IMO... - Steve O 10:46:09 06/15/06 (1)

Thanks .. points well taken - mikeyb 12:29:26 06/15/06 (0)

Follow Ups

Re: Let me ask this - Jim McShane 16:08:23 06/15/06 (0)

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