Search found 8977 matches

by Paul Barker
Wed Apr 17, 2024 8:16 pm
Forum: Everyones Projects
Topic: OK…so I’m on wi’ summat
Replies: 193
Views: 43343

Re: OK…so I’m on wi’ summat

Well you have to find the biggest fook off choke you can find for choke input. This one is a cube showing the EL34 to show how enormous it is. Because this power transformer is 500mA dc capable. So every other part has to be that capable. Youre case isnt so extreme. But success with chokes isnt an a...
by Paul Barker
Wed Apr 17, 2024 7:59 pm
Forum: Assorted Stuff
Topic: General health matters.
Replies: 794
Views: 200077

Re: General health matters.

Anti emitic and very expensive when I was a nurse. Only given then to people on chemo.
by Paul Barker
Wed Apr 17, 2024 7:42 pm
Forum: Everyones Projects
Topic: Distortion 2 to 3 W DHT,IDHT,Multigrid idht.
Replies: 13
Views: 258

Re: Distortion 2 to 3 W DHT,IDHT,Multigrid idht.

Well the formula we have to accept right or wrong. But measuring errors could be mine. If the printer the artist the actual taking of measurements were right. It would be better to have a table of numbers and process those through the formula. But just as I have nothing to go on but a visual drawing...
by Paul Barker
Wed Apr 17, 2024 6:09 pm
Forum: Everyones Projects
Topic: Distortion 2 to 3 W DHT,IDHT,Multigrid idht.
Replies: 13
Views: 258

Re: Distortion 2 to 3 W DHT,IDHT,Multigrid idht.

Just what the maths came to. Its better now Ive made it fine lines so no judgement as to where the measurement within a thick line. Looks better result. Quite pleased with that valve.
Image

Image
by Paul Barker
Wed Apr 17, 2024 2:21 pm
Forum: Everyones Projects
Topic: Distortion 2 to 3 W DHT,IDHT,Multigrid idht.
Replies: 13
Views: 258

Re: Distortion 2 to 3 W DHT,IDHT,Multigrid idht.

The line is 3 I could minimise it to 1 for most accurate I could achieve when Im home again. The line at 3 is not an easy acurate target. It would be worth doing worst case scenario outer edge to outer edge, then opposite in to in. See what occurs.
by Paul Barker
Wed Apr 17, 2024 11:59 am
Forum: Everyones Projects
Topic: Distortion 2 to 3 W DHT,IDHT,Multigrid idht.
Replies: 13
Views: 258

Re: Distortion 2 to 3 W DHT,IDHT,Multigrid idht.

The tube above 801a was a bit of a good condenter. But thumbing the Vade Mecum for similar powered triode connected multigrids I found a sleeper. Found them available from the east https://i.postimg.cc/8zDwyQZh/IMG-1271.jpg https://i.postimg.cc/sxhKLVFJ/IMG-1272.jpg https://i.postimg.cc/pXj1GBRt/IMG...
by Paul Barker
Wed Apr 17, 2024 8:23 am
Forum: Everyones Projects
Topic: Mullard EL38 Triode connected.
Replies: 5
Views: 194

Re: Mullard EL38 Triode connected.

I’ve sent the email to order the uTracer 6 (1,000v) and the extra board for +100v grid bias and associated current measurement.
by Paul Barker
Wed Apr 17, 2024 2:34 am
Forum: Everyones Projects
Topic: Mullard EL38 Triode connected.
Replies: 5
Views: 194

Re: Mullard EL38 Triode connected.

Good spot Max. Thank you.
by Paul Barker
Tue Apr 16, 2024 5:15 pm
Forum: Everyones Projects
Topic: Mullard EL38 Triode connected.
Replies: 5
Views: 194

Re: Mullard EL38 Triode connected.

Ok, I had to get more b+ so I got the blue bariac. Tuned up anode and g2 voltage to 400v which is max for both. With both at 400v the bias is 25v 35mA so dissipation is 15 watts which is conservative as max combined is 25watts. Estimate power between 1/4 3.7 W to 1/3rd 4.9 watts. Cant hear distortio...
by Paul Barker
Tue Apr 16, 2024 9:32 am
Forum: Everyones Projects
Topic: Mullard EL38 Triode connected.
Replies: 5
Views: 194

Re: Mullard EL38 Triode connected.

Ive two more nos both sellers only had one. One is Langrex the other isnt a person known. Going rate it 35 plus carriage. Worth every penny. You can get used tested for 20 +.
by Paul Barker
Tue Apr 16, 2024 9:14 am
Forum: Everyones Projects
Topic: Mullard EL38 Triode connected.
Replies: 5
Views: 194

Mullard EL38 Triode connected.

Just had to try it same pinout as EL34. https://i.postimg.cc/k4zXVx8G/IMG-1267.jpg https://i.postimg.cc/Vkgf9yM3/IMG-1268.jpg I took a look at has a lovely bright cathode, beautiful to behold. Looked at the EL37 data. I dont think its the same. My b+ is 275v its dissipating 7 watts the 620 ohm rk is...
by Paul Barker
Tue Apr 16, 2024 5:57 am
Forum: Everyones Projects
Topic: 45 SET
Replies: 155
Views: 32493

Re: 45 SET

Thanks for the remider. Finding the EL36, it confirmed my view it is a dead duck. Disgracefull distortiin. Shame it doesnt have 10Y or 801a. Good that GM70 at full power is as good as it measured for me. But also the 211 holds its own, and considering there is more reasons not portrayed in any chara...
by Paul Barker
Mon Apr 15, 2024 12:06 pm
Forum: Everyones Projects
Topic: 45 SET
Replies: 155
Views: 32493

Re: 45 SET

Well its free hosting
by Paul Barker
Mon Apr 15, 2024 9:17 am
Forum: Everyones Projects
Topic: 45 SET
Replies: 155
Views: 32493

Re: 45 SET

I can suure you operating my EL34 SE where its second is better than any dht has prevented me leaving the room, its addictive. The biggest improvement fixing the 2nd harmonic elephant in the room. Thats why Im not wasting time on the EL36. Sorry to report. Its a dead loss not using the valves the be...