Search found 8385 matches

by Cressy Snr
Sat Jul 20, 2019 12:58 pm
Forum: Everyones Projects
Topic: Small Push-Pull Amp.
Replies: 17
Views: 290

Re: Small Push-Pull Amp.

Some working out (not mine, but why reinvent the wheel) http://i.imgur.com/5Q8ptes.jpg The blue line gives 26.1W plate dissipation per section, plus the 31.5W of heaters. This means having to shift 83.7W of heat from a bottle the size of a KT88 The green line at 23.5W per section is a little cooler ...
by Cressy Snr
Fri Jul 19, 2019 10:27 pm
Forum: Everyones Projects
Topic: Small Push-Pull Amp.
Replies: 17
Views: 290

Re: Small Push-Pull Amp.

6336A curves:
Image

260 ish on the anodes and 90mA idle current at 80 ish Vk looks decent to me.

2K5 loadline.
by Cressy Snr
Fri Jul 19, 2019 10:15 pm
Forum: Everyones Projects
Topic: Small Push-Pull Amp.
Replies: 17
Views: 290

Re: Small Push-Pull Amp.

Nowt wrong with triode strapped valves. Some prefer gk71 over gm70. I liked 813 triode connected as much as I loved 211 for their unique stand out extra not heard in most amplifiers. Entirely different to each other yet only mood or tastes depending on which way your preference lies. Just having a ...
by Cressy Snr
Thu Jul 18, 2019 4:53 pm
Forum: Everyones Projects
Topic: Small Push-Pull Amp.
Replies: 17
Views: 290

Re: Small Push-Pull Amp.

Trawling through my valve box upstairs, I find a NOS pair of Tung-Sol 6336A. Now that’s interesting :wink: A stereo, single ended amplifier in one tube, or a push pull with two of them. Now, I have actually built an SE amp with one of these before. It was only a two-stager with just about enough gai...
by Cressy Snr
Wed Jul 17, 2019 7:03 pm
Forum: Everyones Projects
Topic: Small Push-Pull Amp.
Replies: 17
Views: 290

Re: Small Push-Pull Amp.

That’s a good idea.
I’ve still got a few 6AS7s, including four coke bottle Russian ones courtesy of Mr I. :)

Should do a nice 10WPC.
by Cressy Snr
Wed Jul 17, 2019 5:35 pm
Forum: Everyones Projects
Topic: Small Push-Pull Amp.
Replies: 17
Views: 290

Re: Small Push-Pull Amp.

Having perused data sheets all afternoon, and given that I have 5K a-a OPTs with a single 8R speaker winding, the only configuration that works bang-on with the transformer characteristics, is Class AB, triode connected EL34s with cathode bias and a bypassed pair of cathode resistors- 400V on the an...
by Cressy Snr
Wed Jul 17, 2019 4:54 pm
Forum: Everyones Projects
Topic: Small Push-Pull Amp.
Replies: 17
Views: 290

Re: Small Push-Pull Amp.

You guys have much better memories than me, but..... didn't our man in Bedford make a little push pull el34 years ago? I seem to vaguely remember it being red and everybody liked it at the time...it may have been the time he played Stravinsky's 'firebird'....but then again it might not have... I th...
by Cressy Snr
Wed Jul 17, 2019 1:17 pm
Forum: Everyones Projects
Topic: Small Push-Pull Amp.
Replies: 17
Views: 290

Small Push-Pull Amp.

I like playing around with valves. Not that this is going to replace the SEOTL, but I do fancy a play around with the idea of another small, push-pull valve amp. Not decided yet what valves to use, but I have a drawer with quads of EL34, KT66 PCL86, PL36 and 6V6. The last push pull amps I built disa...
by Cressy Snr
Mon Jul 15, 2019 10:38 pm
Forum: New Users
Topic: Hello
Replies: 10
Views: 220

Re: Hello

moo-fi wrote:
Mon Jul 15, 2019 10:16 pm

I know quite a few people from the Wam around the area, as we held a bake off last year and another one in a few weeks time.
Is that the WAM “Doncaster bake off” you’re doing?
by Cressy Snr
Sat Jul 13, 2019 10:20 pm
Forum: Your Fave Artists
Topic: What Are You Listening To Right This Minute?
Replies: 3246
Views: 243985

Re: What Are You Listening To Right This Minute?

Casey Mac’Gill’s Blue 4 Trio.
Jump jive, swing, boogie-woogie and three part harmonies - Love it! :)
And a small band swing version of The Beatles’ “You Can’t Do That” ......crazy man.
by Cressy Snr
Thu Jul 11, 2019 10:52 pm
Forum: Your Fave Artists
Topic: What Are You Listening To Right This Minute?
Replies: 3246
Views: 243985

Re: What Are You Listening To Right This Minute?

Richard Hawley - Truelove’s Gutter.

Fab! :)
by Cressy Snr
Tue Jul 09, 2019 7:13 pm
Forum: Everyones Projects
Topic: Remember These?
Replies: 658
Views: 30137

Re: Remember These?

There's not much that can beat a good old-school carbon pot for volume control. I am very grateful for Steve S for providing me with one for the tweeter amp. Yep, those carbon pots are excellent. My TOCOS carbon pot has decent channel balance as it was one of the first batch that Nick Lucas importe...
by Cressy Snr
Sun Jul 07, 2019 11:09 pm
Forum: Everyones Projects
Topic: Remember These?
Replies: 658
Views: 30137

Re: Remember These?

Well I’ve not had too many sherbets today. :) I’d been using a pair of 10K TOCOS pots borrowed off our Ant as volume left and right controls. Nice pots, Anyway I found, while tidying up the hobby room, a 250K stereo TOCOS pot I bought years ago, when Nick Lucas first started stocking them; so this e...
by Cressy Snr
Sun Jul 07, 2019 10:46 am
Forum: Assorted Stuff
Topic: My Next Big Ride
Replies: 26
Views: 881

Re: My Next Big Ride

Aye,
Up and at ‘em Ray. :)
by Cressy Snr
Sat Jul 06, 2019 8:48 am
Forum: Everyones Projects
Topic: Remember These?
Replies: 658
Views: 30137

Re: Remember These?

Jesus, you get up in the morning and don’t half read some fooking drivel. “Sadly I now prefer my beloved 13E1 SEOTL”… FFS! Both amps are good in different ways. Sometimes I like one, sometimes I like the other. The SEOTL is the current fave. There…fixed that. Tip...Don’t post without reading through...