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by Cressy Snr
Sun Apr 14, 2024 2:08 pm
Forum: Everyones Projects
Topic: OK…so I’m on wi’ summat
Replies: 188
Views: 42684

Re: OK…so I’m on wi’ summat

The idea came from the fact that the 6SL7s are drawing around 1mA each and I wanted to use a series VR105 tube to knock around 100V off the HT. I wanted that tube simply because unlike the 7pin VR tubes, it looks great when lit and I only have the one. I had to think of some way to make the tube pas...
by Cressy Snr
Sat Apr 13, 2024 9:08 pm
Forum: Everyones Projects
Topic: OK…so I’m on wi’ summat
Replies: 188
Views: 42684

Re: OK…so I’m on wi’ summat

A little more experimentation with the power supply today. I've seen series VR tubes used to feed the input stages of commercial amps such as those from Decware and Icon Audio, so I thought I'd give one a try in my own amp: EL34SEULSimplifiedPSU.png 22K shunt resistor makes sure around 15mA is flowi...
by Cressy Snr
Thu Apr 11, 2024 3:17 pm
Forum: Everyones Projects
Topic: EL34 SE
Replies: 6
Views: 271

Re: EL34 SE

Glad they got to you in one piece. :D
by Cressy Snr
Tue Apr 09, 2024 10:32 pm
Forum: Everyones Projects
Topic: OK…so I’m on wi’ summat
Replies: 188
Views: 42684

Re: OK…so I’m on wi’ summat

I don’t think they pose any danger Simon. My hairy-arsed soldering is probably to blame for the problems with mine.
by Cressy Snr
Tue Apr 09, 2024 9:16 pm
Forum: Everyones Projects
Topic: OK…so I’m on wi’ summat
Replies: 188
Views: 42684

Re: OK…so I’m on wi’ summat

I’m glad I got it going again with the JJ and the Sprague caps. It’s a great little amp and the ultimate quality of the sound doesn’t seem to depend on whether or not electrolytic caps or foil in oil caps are used. Yes, of course it is slightly better in the treble, with foil in oil caps but the dif...
by Cressy Snr
Tue Apr 09, 2024 3:25 pm
Forum: Everyones Projects
Topic: PSE EL84 Amplifier
Replies: 43
Views: 1235

Re: PSE EL84 Amplifier

Nope,
Still the same as it was.
by Cressy Snr
Tue Apr 09, 2024 1:11 pm
Forum: Everyones Projects
Topic: PSE EL84 Amplifier
Replies: 43
Views: 1235

Re: PSE EL84 Amplifier

Not got the text Paul.
by Cressy Snr
Tue Apr 09, 2024 8:21 am
Forum: Everyones Projects
Topic: PSE EL84 Amplifier
Replies: 43
Views: 1235

Re: PSE EL84 Amplifier

Hi Paul,
PM your address and I’ll get them off to you.
by Cressy Snr
Mon Apr 08, 2024 9:16 pm
Forum: Everyones Projects
Topic: PSE EL84 Amplifier
Replies: 43
Views: 1235

Re: PSE EL84 Amplifier

I have 4 x NOS, PL36 if you want them Paul. They are Thorn or Mazda (can't be sure until I dig them out) never been used. They have 25V heaters. Might be useful?
by Cressy Snr
Mon Apr 08, 2024 5:22 pm
Forum: Everyones Projects
Topic: OK…so I’m on wi’ summat
Replies: 188
Views: 42684

Re: OK…so I’m on wi’ summat

Enjoy the music, Steve, that sounds like a good plan for staying off the slippery slope. Yeah that would have been nice; in fact it was very nice indeed...that is until last Thursday afternoon. The telly was on, Melanie was watching "Impossible," I was upstairs, not having turned the amp ...
by Cressy Snr
Wed Apr 03, 2024 4:23 pm
Forum: Everyones Projects
Topic: OK…so I’m on wi’ summat
Replies: 188
Views: 42684

Re: OK…so I’m on wi’ summat

Enjoy the music, Steve, that sounds like a good plan for staying off the slippery slope. The combination of this amplifier, the Mac Mini and the RTZ DAC (with the higher quality op-amps) is producing the best sound I’ve had in this room…ever! I think, trying to wring anything extra out of the amp m...
by Cressy Snr
Wed Apr 03, 2024 2:41 pm
Forum: Everyones Projects
Topic: OK…so I’m on wi’ summat
Replies: 188
Views: 42684

Re: OK…so I’m on wi’ summat

There is nothing simple, that can’t be made more complex. I needed to take a step back and ask myself if what I wanted to do was actually necessary? I seemed to be planning to up my solder connections, up the parts count, double my chances to make a mistake. Double my chances for failure, so I thoug...
by Cressy Snr
Wed Apr 03, 2024 1:16 pm
Forum: Everyones Projects
Topic: OK…so I’m on wi’ summat
Replies: 188
Views: 42684

Re: OK…so I’m on wi’ summat

Was going to go fixed bias (Gawd knows why.) Got all the way to building a pair of bias supplies. Tested them, they worked faultlessly then I wondered what I was playing at and thought, sod it!

Just enjoying the music instead.
by Cressy Snr
Sat Mar 30, 2024 9:12 pm
Forum: Everyones Projects
Topic: OK…so I’m on wi’ summat
Replies: 188
Views: 42684

Re: OK…so I’m on wi’ summat

I tried the silver mica caps from Simon, years ago. Didn’t like them I’m afraid: to call them screechy is being kind. :(
by Cressy Snr
Sat Mar 30, 2024 5:26 pm
Forum: Everyones Projects
Topic: OK…so I’m on wi’ summat
Replies: 188
Views: 42684

Re: OK…so I’m on wi’ summat

In the meantime, here is the newest version of the audio circuit:
EL34SEULNobypass.png
EL34SEULNobypass.png (52.58 KiB) Viewed 697 times