Search found 34 matches
- Sat Dec 12, 2009 7:37 pm
- Forum: Transformers
- Topic: IT for 826
- Replies: 13
- Views: 21739
follow-up
I realize this is an old thread, but I wanted to post more recent experience with the 826: I'd like to amend what I said earlier, the 826 sounds every bit as good as the 3C24/25T ('tho I would not say it sounds better). The 826 does indeed need at least 500 vpk to begin to shine...and the lack of a ...
- Mon Dec 07, 2009 6:06 pm
- Forum: Current Cancellation
- Topic: a 1:1 nickel IT for a 10
- Replies: 20
- Views: 28629
- Sun Dec 06, 2009 11:22 pm
- Forum: Current Cancellation
- Topic: a 1:1 nickel IT for a 10
- Replies: 20
- Views: 28629
In my estimation, A2 is out of the question here. Heck, if you want A2, I'd say you're better off to start from scratch with a tube designed for A2. You know, the 826 would make a dandy A2 output device with no dangerous plate caps to worry about. Re: metal-plate 211s: yep, I've thought about it, bu...
- Sun Dec 06, 2009 8:48 pm
- Forum: Current Cancellation
- Topic: a 1:1 nickel IT for a 10
- Replies: 20
- Views: 28629
Buzz: Aside from asking that you not produce it commercially, you may feel free to use the 826. It's an excellent driver, but be forewarned that its filament draws a LOT of current! The 3C24 sounds virtually identical to the 826, and will save you about 20% on filament current. Of course, the mu is ...
- Sun Dec 06, 2009 3:48 pm
- Forum: Current Cancellation
- Topic: a 1:1 nickel IT for a 10
- Replies: 20
- Views: 28629
- Thu Nov 19, 2009 4:49 pm
- Forum: Transformers
- Topic: Inverting Interstage Transformers.
- Replies: 5
- Views: 8239
- Wed Feb 18, 2009 4:37 pm
- Forum: Phono
- Topic: 416C defined source Z phono
- Replies: 7
- Views: 9909
- Sun Dec 21, 2008 9:19 pm
- Forum: Current Cancellation
- Topic: new project, new challenges -> CC IT for 100TH driving GM
- Replies: 17
- Views: 23810
- Fri Dec 19, 2008 5:17 pm
- Forum: Phono
- Topic: Transformer phono correction
- Replies: 54
- Views: 52515
- Fri Nov 07, 2008 3:45 pm
- Forum: Phono
- Topic: Where to squeeze a 600ohm LCR riaa network
- Replies: 4
- Views: 5896
- Mon Aug 25, 2008 3:46 pm
- Forum: Inductors
- Topic: lowmu hihenry
- Replies: 3
- Views: 7949
I'm using the 826 as V1 in a 2-stage SE GM70 amp; it's pretty much my standard GM70 amp, just replacing the 3C24 with an 826. This is the amp that Jonathan Weiss will be demoing in his NYC loft, and I didn't want plate caps to scare anyone away ;-) P.S. I'm unaware of a rectifier shaped like the 826...
- Sun Aug 24, 2008 8:20 pm
- Forum: Inductors
- Topic: lowmu hihenry
- Replies: 3
- Views: 7949
- Tue Jan 29, 2008 5:30 pm
- Forum: Transformers
- Topic: Proposed interstage coupling transfo
- Replies: 4
- Views: 5985
- Mon Sep 24, 2007 1:14 pm
- Forum: Attenuators
- Topic: Sowter TVC mystery
- Replies: 3
- Views: 5194
- Mon Sep 17, 2007 7:52 pm
- Forum: Attenuators
- Topic: Sowter TVC mystery
- Replies: 3
- Views: 5194
Sowter TVC mystery
I am rebuilding a linestage for a customer utilizing a Sowter TVC at the input - someone else did all of the original wiring; I am simply replacing the original 6AH4 with a filamentary-bised 71A. In tracking down some minor hum, I discovered that the ground on the TVC secondaries is ungrounded...whi...
- Sat Sep 01, 2007 11:11 pm
- Forum: sbench 101
- Topic: 45 Watts per channel push pull 801As
- Replies: 15
- Views: 27538
- Fri Feb 02, 2007 11:29 pm
- Forum: Transformers
- Topic: SE amps to drive ES panels.
- Replies: 20
- Views: 30882
This is totally unrelated to tubes or transformers...it's purely nostalgic. I lived in Kansas City from 1978 through 1981 - during that time I recall a listening session at someone's house who had Stax ES speakers driven by a large pair of Stax SS amps [my young ears thought they sounded pretty good...
- Sun Jan 21, 2007 7:42 pm
- Forum: Transformers
- Topic: IT for 826
- Replies: 13
- Views: 21739
More re: 3C24/25T: > What do you think about more juice, like 750 v, 20 mA No opinion; but I certainly encourage experimentation - heck, the 826 might sound great with 750 vdc! > Why not use 200H? My general rule of thumb is not less than 30 Hy per 1k of R(p)...I also used the plate chokes that were...
- Thu Jan 18, 2007 6:58 pm
- Forum: Transformers
- Topic: IT for 826
- Replies: 13
- Views: 21739
I personally prefer the sonics of the 3C24/25T vs the 826; plus, in my experience, the 3C24/25Ts tend to have less problems with gassiness. Please note that I've never experimented with any of these tubes above 450 vdc - it's possible that the 826 would really shine with 500 to 600 volts on the plat...
- Wed Jan 17, 2007 3:08 pm
- Forum: Transformers
- Topic: IT for 826
- Replies: 13
- Views: 21739
- Wed Jul 12, 2006 4:51 am
- Forum: Your name here.
- Topic: dowdy LCL
- Replies: 2
- Views: 7092
- Thu Jul 06, 2006 8:41 pm
- Forum: Phono
- Topic: LCR riaa's
- Replies: 96
- Views: 134317
- Tue Jul 04, 2006 10:19 pm
- Forum: Phono
- Topic: LCR riaa's
- Replies: 96
- Views: 134317
- Tue Jul 04, 2006 5:06 am
- Forum: Phono
- Topic: LCR riaa's
- Replies: 96
- Views: 134317
- Fri Feb 24, 2006 10:22 pm
- Forum: Resistors
- Topic: What about different cores for better cooling?
- Replies: 4
- Views: 10751
> Are you still running these bypassed Jim? All of what I wrote involved cathode resistors that were bypassed - although one of the set-ups was only 90% bypassed [75TH drawing 24 mA]. > if they impart a clarity to the amp through the lack of noise There's definitely an increase in clarity - it's one...
- Wed Feb 22, 2006 5:34 pm
- Forum: Resistors
- Topic: What about different cores for better cooling?
- Replies: 4
- Views: 10751
quasi-scientific hypothesis
> When it comes down to it, these things do not heat that much. Dr. Dave is correct, but, FWIW: I'm beginning to suspect that his uber-cool cathode resistors perform best drawing smallish amounts of current. Again, I'm merely proposing a quasi-scientific hypothesis here. I've only compared in the ca...
- Wed Mar 23, 2005 6:05 pm
- Forum: Resistors
- Topic: R(k) listening report
- Replies: 13
- Views: 20296
more
The 260 ohm [nominal] resistors have been installed. Excellent sonic results once again, quite similar to previous experiments. The L-cancelling mode still sounded best, however the difference between L-cancelling and non-L-cancelling was much less than with the 910 ohm resistors. Dr. Dave assures m...
- Sun Mar 20, 2005 1:31 pm
- Forum: Inductors
- Topic: 75 TL chokes
- Replies: 2
- Views: 7451
thanks, Dave!
Tubes in question are actually 75THs, drawing about 21 mA in the current set-up.
- Fri Feb 04, 2005 5:09 pm
- Forum: Resistors
- Topic: R(k) listening report
- Replies: 13
- Views: 20296
- Thu Feb 03, 2005 1:56 pm
- Forum: Resistors
- Topic: R(k) listening report
- Replies: 13
- Views: 20296
260 ohm resistors
R(k) for a 75TH, current draw is about 25 mA...placed under the chassis.
I don't anticipate under-chassis temperature will ever exceed 90 degrees F.
I don't anticipate under-chassis temperature will ever exceed 90 degrees F.