Hoffman Amplifiers Tube Amplifier Forum
Amp Stuff => EZ Board postings => Topic started by: Geezer on June 18, 2005, 05:17:11 am
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Hoffman Amplifiers
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> Premier Reverb
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Dmichel1984
Junior tube assistant
Posts: 2
(3/9/04 4:59 am)
Premier Reverb
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I'm building a premier reverb 90, I'm not sure what kinda secondary VAC I need on my PT, I was thinking ~120-140, now I'm thinking ~170???? I need 150VDC after first Filter cap(half wave)hammondmfg.com/pdf/5c007.pdf
this may help, i'm confused!!!
Wanabejimi
Junior tube assistant
Posts: 57
(3/9/04 8:11 am)
Re: Premier Reverb
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Hammond PT's are rated for VDC (after the rectifier) so if you need a B+ of 170, you can buy the hammond rated at 170. A rectifier will be the AC voltage x 1.41 (minus the voltage drop in a tube rectifier) So, if you want a B+ of 170, divide that by 1.41 and you'll get 120 vac. That would apply to a non-hammond PT, of course.
Tiny Daddy
I will work on all amps
Posts: 541
(3/9/04 8:15 am)
Re: Premier Reverb
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If you want 150V use a transformer that puts out 110V loaded. But why half wave? Bridge rectifiers are cheap. Also I think most circuits would want 250V.
Dmichel1984
Junior tube assistant
Posts: 7
(3/9/04 5:50 pm)
RE
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The Premier only needs ~150VDC after the first electrolytic... only about 100V on the tubes
I have a schematic w/ all the voltages marked, but this isn't it
www.jt30.com/jt30page/pre...ematic.pdf
stan buczko
Junior tube assistant
Posts: 72
(3/9/04 9:48 pm)
Re: Premier Reverb
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Just curious, why a Premier 90 reverb?? Stan
Dmichel1984
Junior tube assistant
Posts: 10
(3/10/04 1:43 pm)
why?
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have you heard one?????
stan buczko
Junior tube assistant
Posts: 73
(3/10/04 7:10 pm)
Re: why?
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I have owned one since 1967. It was a high school graduation gift from my mother. (so im old big deal) IMO it is not the best sounding reverb. I used it for a year or two, had it in the attic until a year ago (30+yrs) i replaced all the capacitors, resistors, and reverb tank. Its sounds alittle better now than it did back then but no way can it compare to the quality of a Fender or Ampeg unit. Have you heard any of those???
Dmichel1984
Junior tube assistant
Posts: 13
(3/11/04 6:48 am)
too late
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I've heard the Fender reverb several times, I was not aware that Ampeg made a unit(heard all about the onboard verb)....
Am I crazy to like the Premier above the Fender?? I really like the verb(way too much most of the time), but I *love* the dry signal boost it gives....
Dmichel1984
Junior tube assistant
Posts: 15
(3/11/04 9:42 am)
PT question
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I ordered three PT's (all between 125-140VAC secondary) from OldRadioParts.com but one of them only has 3 wires on the secondary, he labeled them as Red(HV), Red/Yellow(CT for both?), Green(6.3V) how would I use this tranny in a normal tube circuit? is something wrong here????
stan buczko
Junior tube assistant
Posts: 74
(3/11/04 10:42 am)
Re: too late
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No your not crazy for liking the Premier, thats what makes the world go around. Its your ears that really count. I kinda like the way the dry boost crunches with my Matchless Clubman 35 also. Good Luck. Stan
vinman753
Junior tube assistant
Posts: 100
(3/14/04 5:29 pm)
Re: too late
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