Welcome! Need support, you got it. Or share you ideas and experiences.
24.22.227.62
In Reply to: RE: shunt regulated upgraded ParamourII 45 project starts today posted by Doc B. on May 22, 2007 at 10:04:17
I got the first SR45 running last night. Tubes were brand new so it needed some break in before I could really judge it. By late last night it was getting into a groove. The 45 type sonics we hoped for are there - the black background and very natural voices. And the cool part is the sucker has bass! I've usually considered the 45 a tweeter amp tube because it always sounds lean to me. But this shunt regulated setup has a bass balance more like our 300B amps, ample (within it's 1.9 watt output capability), extended and quick. Top end is very sweet and extended as we hoped also. Overall the impression is of a very natural, tonally balanced and relaxed sound, low on fatigue and very quick.
This is a conversion of a Paramour II with the MQ iron upgrade kit, so I had one of those playing in the other channel for comparison. There are some differences beyond sonics, like the fact that the SR45 amp is quite a bit less sensitive and has roughly half the power output. But once the levels are matched you can hear a distinct refinement to the sound from the fully regulated amp.
I'll be building and photographing the second amp today. If there is enough interest among upgraded Paramour II owners (like ten of you) I could invest the time to make up a kit. So let me know here if you are interested, and talk a few of your bottlehead buds into trying it too...
Follow Ups:
Doc....I have the paramour II with iron upgrade and would be very interested in the SR45 conversion....please let me know the details....thanks -Al
Second amp is assembled and ready to check out. After doing inventory this morning it looks like you guys have been buying Paramounts fast enough that there isn't enough iron left from the current production run for my multi-amp experiment. All I can say is - thanks!
I'm pretty sure there's about three kits left. If you guys don't buy them in the next few days I'll build one kit into a pair of shunt regulated Paramount 2A3s.
nos or new?
I ran a Cunningham globe 245 to verify operation and now there is an EML 45 in there. I have had TJs in the past and liked them. Don't seem to have any on hand to try. I suspect they ended up at the studio. Since I'm not seeing a lot of folks opting in for these I will go ahead and put the second one together without spending a lot of time to document for a manual. If folks want to try this I can always supply just a schematic and parts, and say "it's for advanced users".
Too many BH amps and upgrades waiting for the solder iron preclude me from buying a Paramour. I would love, however, to buy the kit if you think it can be retrofited to hombrew Excite amps. Also, if you supply an schematic and parts list I would love to try it.
I assume that in order to do this mod the Excites would need to be RC coupled, right? There's, as always, a compromise between DC coupling vs RC coupling with shunt regulation, I guess.
Well hopefully you will post more details and I'm willing to try it.
BTW Doc, my five Paramounts project just took a turn when I decided to upgrade the iron with TFA-2004 nickels and EXO-003 chokes. We'll see how they stand vs my Parabees with DC heaters and JT Parabee 2 mod! Almost identical amps except for the driver tube?
Doc,
My Paramour II with Iron and Cap Upgrade is and always has been a 45 (Sophias) amp. I would appreciate the schematic and parts plus any tips you want to pass on.
Gary
Vinyl and Film Forever
BTW the PARAMounts are very very nice strong and musical for my midbass before the sub takes over...great synergy with my 2A3.
I am watching you on this 45 trip....... :)
Count me in.
Gary
Vinyl and Film Forever
FAQ |
Post a Message! |
Forgot Password? |
|
||||||||||||||
|
This post is made possible by the generous support of people like you and our sponsors: