Search found 4351 matches

by simon
Sat Dec 22, 2007 1:17 pm
Forum: Assorted Stuff
Topic: Nipper's Nose!!
Replies: 74
Views: 19939

It's the personal touch you get with only the best Boards. :)
by simon
Sat Dec 22, 2007 1:12 pm
Forum: Beginners
Topic: 6CD6
Replies: 1
Views: 1370

Where do you find the time and energy to build so many amps Andrew? I doff my cap in admiration.
by simon
Sat Dec 22, 2007 1:09 pm
Forum: Everyones Projects
Topic: 6AS7 Push Pull
Replies: 261
Views: 94285

Hadn't thought about it like that Paul, makes perfect sense now you say it. I've managed to bodge it with various resistors I have - paralleling some, series others - and I've got 5.04V and 5.07V which will do me for now. What's interesting is that laid back sound that the amps had developed which I...
by simon
Fri Dec 21, 2007 11:36 pm
Forum: Everyones Projects
Topic: 6AS7 Push Pull
Replies: 261
Views: 94285

I think this is going to be trial and error. The additional two nominally 0.1R resistors dropped the voltage from 5.48V to 5.22V. Paralleling a pair of nominally 0.47Rs instead gave 5.07V. I guess the values of the resistors are so small the tolerances of the resistors will be important. A little jo...
by simon
Fri Dec 21, 2007 3:05 pm
Forum: Speakers
Topic: DTB vs DIY MLTL
Replies: 451
Views: 87474

The very same pair Dave!

I don't know what their heritage is Colin, it doesn't say on them. I think they originated from Andrew I - perhaps he knows? It's t'other Simon that is hosting in February though.
by simon
Fri Dec 21, 2007 2:18 pm
Forum: Speakers
Topic: DTB vs DIY MLTL
Replies: 451
Views: 87474

Colin, Excellent result! For you to be able to compare them with your ESLs speaks volumes for them. The drivers will continue to improve for a long time... It doesn't look like I'm going to be able to make next Saturday at yours so if you PM me your address I'll put the 6EM7 "loaners" in the post to...
by simon
Fri Dec 21, 2007 2:10 pm
Forum: Everyones Projects
Topic: C3g->2A3
Replies: 183
Views: 42252

I think (though its only a guess) that James didn't show that circuit as a complete set of instructions as to how to build an amp, I think it was more of a shape, that then got some values added, and little things like grid resistors were left as "An excercise for the reader" Yes, I think that's co...
by simon
Fri Dec 21, 2007 9:58 am
Forum: Everyones Projects
Topic: 6AS7 Push Pull
Replies: 261
Views: 94285

What rectifier? We are using AC aren't we? :? Simple CRC. 5V Hammond filament tx into bridge into 4700uF - 0.1R - 4700uF. My gut instinct is also to put one in each wire, though I can't see why it would make any difference either. Of the few amps I've built the AC filament voltages have been spot o...
by simon
Thu Dec 20, 2007 11:42 pm
Forum: Everyones Projects
Topic: 6AS7 Push Pull
Replies: 261
Views: 94285

Sorry, I wasn't very clear, I meant put 1 No. 0.1R in each wire. Thanks Lee.

Have to say the amps sounds wonderful now. :D
by simon
Thu Dec 20, 2007 11:10 pm
Forum: Everyones Projects
Topic: 6AS7 Push Pull
Replies: 261
Views: 94285

Okay, if I want to drop 0.5V, and according to the KR website the 300BXLS draw 1.9A I need a resistor of 0.26R of 3W or so. Am I right in thinking I need to put 0.26R in one wire or 0.13R in both wires from the tx? As I happen to have 4 No. 0.1R resistors this would be a good start perhaps?
by simon
Thu Dec 20, 2007 10:07 pm
Forum: Everyones Projects
Topic: 6AS7 Push Pull
Replies: 261
Views: 94285

Simple CRC. 5V Hammond filament tx into bridge into 4700uF - 0.1R - 4700uF. When I checked the DC voltage it was down at 4.4V, bit of a shock but I guess the KRs must draw more current than standard 300Bs. I'm a bit surprised it's so much over now though. I can tweak the bridge with schottkys to giv...
by simon
Thu Dec 20, 2007 9:46 pm
Forum: CD
Topic: Computer Audio
Replies: 363
Views: 92175

I'm going to Maplins tomorrow to buy a power supply. It's the wrong time of the year or I'd get a DAC too.
by simon
Thu Dec 20, 2007 9:43 pm
Forum: Everyones Projects
Topic: 6AS7 Push Pull
Replies: 261
Views: 94285

Thanks for coming over and bringing the amp Steve, I had a really good day. The amp sounds very good, this is the least PP-sounding PP amp I've heard. My horns were able to show the control it has in the bass, which we didn't really hear that at Steve's, for obvious reasons. Bigger metronomes should...
by simon
Mon Dec 17, 2007 10:31 pm
Forum: Beginners
Topic: What is SPICE
Replies: 204
Views: 49439

Hoping to catch up this weekend...
by simon
Mon Dec 17, 2007 4:45 pm
Forum: Everyones Projects
Topic: 6AS7 Push Pull
Replies: 261
Views: 94285

SteveTheShadow wrote:On Simon's Fostexes I'll probably realise what I've been missing by using small speakers.
Or not, as the case may be...