SR45 amplifier

[debk]

John

The Grid choke is hidden by the large parafeed capacitor, it is mounted with the holes that the cathode resistors in the Paramount would have used.
Yes, I remember your amps, they sounded wonderful!

Deb

[Grainger49]

Deb,

I wasn't going to harass you about burn in.

But I was wondering when we would see the purple pictures.

Nice build, good looking amps.

I take it that the 47uF is the cathode bypass?

[debk]

The 47uf's are the power supply capacitiors

Deb

[xcortes]

After a looong and scary delay at customs my SR45 are right now being set up at room 845 at RMAF. So don't take Deb's words for granted and go and listen to them

[debk]

Iv'e been listening to the SR45's quite at bit.
they are sounding better and better every day.  I am amazed how much more I can hear.  I can decern individual instruments in the music, amazing detail and clarity.
Very impressed I really like the sound of the 45 tubes

Deb

[Jim R.]

Hi Deb,

Great to hear! How's the solo piano material sounding?

BTW, my wife was curious to see what I sent to you, a woman, the other day :-).

-- Jim

[denti alligator]

I haven't been following this thread very closely. So are these superior to the Paramounts? How much work goes into them? Parts easily available?

[debk]

The solo piano material is amazing.  the closest to live I have ever heard.  I continue to marvel at the detail and clarity these amps have.

That's funny, hope your wife didn't give you a hard time :-).

Deb

[debk]

I haven't been following this thread very closely. So are these superior to the Paramounts? How much work goes into them? Parts easily available?

I personally like the sound of the SR45 better than my 2a3 Paramount.  The SR45 is a modified Paramour 2.  As for parts I was lucky enough to have someone sell me an unbuilt SR45 upgrade kit.

Deb

[denti alligator]

Does it sound better than a 45 modded Paramount?

[caffeinator]

What Power Transformer did you use?  I can't quite make it out from the picture.

thanks,

David

[debk]

Never heard a Paramount modded for 45's so I can't compare the two.

The transformer is the Bottlehead PT-2

Deb

[Jim R.]

And the s.e.x. 2.1 iron upgrade kit would do nicely for the iron, plus a  triad c7x for a psu choke, however... the real issue is that the shunt reg design has been pulled from the BH web ssite as it is BH intellectual property and PJ is not totally happy with the design. So, it really comes down to paramour II and this shunt reg board with minimal changes and you have and SR-45.

We did a group buy of the PT2 power transformers a bit over a year ago and I have no idea if BH has these or will let you copy the design of the shunt reg board, which you'd have to make from scratch as it was based on an old version of a C4S board -- at least I am not sure if one of the new boards could be made to work.

More than likely you'll have to wait for the new version of the SR-45, which may or may not become a product -- that's all between Doc and PJ.

I think there were only something like 10 or 12 of the sr-45 upgrade kits ever sold, so they're pretty rare out there.

HTH,

Jim

[denti alligator]

Well, if it makes a difference, I'm still in the market for Paramounts, and if the SR45 is really a step up (with proper speakers), then you could put me on the list for those instead. I'm sure there would be more interest, too.

[Jim R.]

Maybe in the Spring I can do the comparison, or maybe Sail Doctor can take his 45 paramounts over to Clark's place and compare to the sr-45s over there.