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#31 Re: 45 SE

Posted: Mon May 03, 2021 10:26 am
by Cressy Snr
IslandPink wrote: Sun May 02, 2021 11:09 pm Impressive work in such a short space of time. Glad you are enjoying it.
I love my 45's for the treble.
Yep, I’m certainly enjoying it. I’m not going to go all flowery prose about the sound as most of you, having used 45s at some point already know about that.
Paul Barker wrote: Mon May 03, 2021 7:18 am
I’m dumbstruck how quick.
It’s just me Paul. Part of my mental health profile I’m afraid.
I get the bit between my teeth and that’s it; there’s no stopping me. I’ve probably spent 30 out of the 48 hours that made up the weekend, hunched over a soldering iron and testing and rejecting different scenarios, so much so that I ran out of solder yesterday and had to call on our Ant for some more.
The result was (for once) well worth the effort. And the missus got complete control of the telly for the whole weekend, so everybody’s happy.

#32 Re: 45 SE

Posted: Mon May 03, 2021 10:36 am
by Nick
Sounds perfectly fine to me. You wanted to do something, you had the parts on hand to do it, you did it. What would have been improved by taking longer?

#33 Re: 45 SE

Posted: Mon May 03, 2021 10:41 am
by Cressy Snr
Nick wrote: Mon May 03, 2021 10:36 am Sounds perfectly fine to me. You wanted to do something, you had the parts on hand to do it, you did it. What would have been improved by taking longer?
Not a lot. It would just have taken a bit longer for my hands to get shot to pieces. :lol:

#34 Re: 45 SE

Posted: Mon May 03, 2021 2:10 pm
by Cressy Snr
Diagrams:
45amp.png
45amp.png (94.5 KiB) Viewed 3231 times
45psu.png
45psu.png (97.96 KiB) Viewed 3218 times
EDIT.
Resistor removed from PSU.
See post below.

#35 Re: 45 SE

Posted: Mon May 03, 2021 2:27 pm
by Nick
For me I would loose the 18r resistor. That will be putting a corner at 400hz that can't be doing any good.

#36 Re: 45 SE

Posted: Mon May 03, 2021 2:29 pm
by Cressy Snr
Nick wrote: Mon May 03, 2021 2:27 pm For me I would loose the 18r resistor. That will be putting a corner at 400hz that can't be doing any good.
OK, I'll sort that out.

#37 Re: 45 SE

Posted: Mon May 03, 2021 3:54 pm
by Ray P
Cressy Snr wrote: Mon May 03, 2021 2:10 pm EDIT.
Resistor removed from PSU.
See post below.
Had me for a while there Steve, I was sat staring thinking I can't see an 18R resistor! :roll: :-?

#38 Re: 45 SE

Posted: Mon May 03, 2021 4:36 pm
by IslandPink
It's like a 'spot the ball' competition now :)

#39 Re: 45 SE

Posted: Mon May 03, 2021 4:37 pm
by JamesD
I am in awe of your speed to complete this!!! Really impressive and I'm sure it sounds delightful :D :D :D

#40 Re: 45 SE

Posted: Mon May 03, 2021 6:22 pm
by Paul Barker
The Teflon cap is probably just right. The minor earlier LF roll off would probably not be missed, a grid choke would restore the lower base more importantly phase shift lowered. So trying that might sound better. I could bring two for us to try (when we’re permitted) but I have to take them home for my project.

Glad you’re respecting the 45’s.

Bet it’s toned and delicate.

#41 Re: 45 SE

Posted: Mon May 03, 2021 7:24 pm
by Cressy Snr
JamesD wrote: Mon May 03, 2021 4:37 pm I am in awe of your speed to complete this!!! Really impressive and I'm sure it sounds delightful :D :D :D
Aye, it does sound lovely. It's the best sounding amp I've had on the Fane speakers. It really does make them sing.
Can't wait to bring it to the next Owston and play a boatload of "plinky plonk bollocks" (© Richard Dunn.) through it. :mrgreen:

#42 Re: 45 SE

Posted: Mon May 03, 2021 7:27 pm
by Cressy Snr
Paul Barker wrote: Mon May 03, 2021 6:22 pm ...a grid choke would restore the lower base more importantly phase shift lowered. So trying that might sound better. I could bring two for us to try (when we’re permitted) but I have to take them home for my project.

Glad you’re respecting the 45’s.

Bet it’s toned and delicate.
Sounds like a good plan Paul.
You've got to respect these old valves.
Aye, it's the tone that does it for me.

#43 Re: 45 SE

Posted: Tue May 04, 2021 9:52 pm
by Cressy Snr
Well I'm so entranced with 45s, I just had to make a couple of plinky plonk playlists from my iTunes library to show 'em off.
Here's a few tracks from one of the lists: I'm impressed by the sheer unadulterated plinkyplonkyness of some of this stuff I'd forgotten I had :lol:
Plinky Plonk.jpg
Plinky Plonk.jpg (208.36 KiB) Viewed 3109 times

#44 Re: 45 SE

Posted: Wed May 05, 2021 8:06 am
by Cressy Snr
Seriously though, I feel privileged to be using these lovely old devices.
I’m back in the DHT club after a 10 year hiatus.
It’s down to the single driver speakers and their 100dB efficiency as much as it is to the 45s, as these speakers enable the best use of very low power amplification.
I should get the Black Gate cap today and Paul has posted the second pair of valves.
All I can say is thanks to Paul, my mystery benefactor :wink: and Nick. So I should have 45 sound for the rest of my natural. Excellent! AT is a great place to be part of.

#45 Re: 45 SE

Posted: Wed May 05, 2021 11:32 am
by steve s
Cressy Snr wrote: Wed May 05, 2021 8:06 am Seriously though, I feel privileged to be using these lovely old devices.
I’m back in the DHT club after a 10 year hiatus.
It’s down to the single driver speakers and their 100dB efficiency as much as it is to the 45s, as these speakers enable the best use of very low power amplification.
I should get the Black Gate cap today and Paul has posted the second pair of valves.
All I can say is thanks to Paul, my mystery benefactor :wink: and Nick. So I should have 45 sound for the rest if my natural. Excellent! AT is a great place to be part of.
Thats great Steve, I find a couple of watts more than adequate too, i hope you still have it in one piece when we can have a session.. I would love to hear it.