MagneQuest/Peerless Forum

Welcome! Need support, you got it. Or share your ideas and experiences.

Return to MagneQuest/Peerless Forum

MagneQuest Forum

Eye Candy 300B Style

216.68.190.129

[ Follow Ups ] [ Post Followup ] [ Thread: Display Email Next ] [ MagneQuest Forum ]

Gang,
I have over 600 hours in this project. It is by far the most complex (yea wait till next week) project I have undertaken.
300B Integrated Silver PF outputs 10W
INT section 1/2 6922 direct coupled to a 6J5GT cap cooupled to the grid choke, 300B self biased.
Battery Phono as follow MC only 62dB gain fixed:
Toshiba 2SK147 cascode MP to 1% (I have tons of these) to an LM394. All Silver leaded Shinko Tantulum resistors. Passive EQ, other 1/2 of 6922 used as a post amplifier.
Seperate power supply uses a GZ34 and houses a digital power transformer also (internal). Seperate choke supplies, WKZ's out the ying yang!
Only 50 or so Black Gates where harmed in this 2 piece unit.
5 Custom PCB, phono, 2 psw, digital processing unit, digital supply board.
Mikey can afford to go camping in style with what is in here :)
Specs
10W at 3% 5-40KHz -3, -1dB at 18-24KHz
Noise: 0.012mv of noise got to love that horn lovers
5 inputs (one line, one phono, Toslink, USB, BNC Spdif)
Well behind better get to work!
Thanks
Gordon

J. Gordon Rankin

Follow Ups:

Very Nice Gordon..........nt - JIMMY 20:08:59 08/05/05 (0)
.
Cheater - Mr. Lowther 14:35:53 06/29/05 (7)
Gordon:
You say over 600 hours, so we are all thinking about 600 hours. Of course over 600 hours can be 1,000 hours, which is somewhat closer to the mark. We already feel inferior about being unable to do this quality of work, don't make us feel bad about how long it takes us to make inferior stuff.
Great looking work, and we do not have to listen to know what your products sound like. Now you have some fun.
BTW picked up some Altec (Peerless) 15K:15K linestage trannies to solve my problem.

Jon Ver Halen
- peerless part number? - mqracing 21:28:44 06/29/05 (5)
  Hi Jon:
  Do you have the peerless part number for the 15K:15K trans? I cannot readily think of such a critter from the archives...
  curious...
  MSL
  - Joppa, as usual, is right - Mr. Lowther 06:35:10 06/30/05 (0)
    Hi Mike:
    Yup, they are Altec 15335A's.
    Sorry Steve, I picked up the last 2, no more from that source.
    
    Jon Ver Halen
  - 15335? (nt) - Paul Joppa 22:49:02 06/29/05 (2)
    nt
    - yep... 15K to 15K - mqracing 22:54:24 06/30/05 (1)
      found it finally... errenously housed in the 15355 folder.
      mol is +18 dbm
      neat little guy... built on a high nickel square stack of EI's...
      relatively low dcr's on both pri and sec windings
      flux density of 1884 gauss at 6.15 vrms at 30 hz
      
      curious how you were fimiliar with this part number paul?
      
      msl
      - Re: yep... 15K to 15K - Paul Joppa 11:11:29 07/01/05 (0)
        
        In Reply to: yep... 15K to 15K posted by mqracing on June 3, 2005 at 22:54:24:
        
        > > curious how you were familiar with this part number paul?
        I went on the 'Bay looking for 4722s, and got interested in the octal plug-in Altec/Peerless line. Some very practical units there, and if the 4722 is any indication, very good sounding.
        After our phone talk this morning, I though some more and I think the 15335 can be used balanced to SE after all, though I agree it will show best in SE to SE applications.
  - Re: peerless part number? - Steve Eddy 22:05:38 06/29/05 (0)
    Do you have the peerless part number for the 15K:15K trans? I cannot readily think of such a critter from the archives...
    curious...
    
    I'm wondering if, since it's from Altec, if it wasn't one designed by Ed Reichenbach who had some history with Altec before he started Reichenbach Engineering. Ed's son Tom, who now runs CineMag, has a 15k:15k input trannie in their lineup.
    From CineMag's corporate profile page:
    
    CineMag was founded in 1979 in North Hollywood, California. Its mission is to manufacture the very best audio magnetic components in the world. However, its history goes back to 1953 when its founder, Tom Reichenbach, was a youngster and was already making transformers with his father, Ed.
    Edward Reichenbach's experience in the audio transformer business goes back to Altec Lansing during World War II. Starting there, he designed many transformers which ended up in their equipment. There are some interesting pictures of Ed at Altec Lansing on the Cork Board. After Ed left Altec Lansing he manufactured audio and power transformers and inductors on his own. Eventually, Ed formed Reichenbach Engineering and developed a line of transformers which became ubiquitous standards in the pro audio industry.
    
    se
- Re: Cheater - Steve Eddy 21:10:44 06/29/05 (0)
  BTW picked up some Altec (Peerless) 15K:15K linestage trannies to solve my problem.
  
  Any more where those came from? I'd like to grab a couple to play with when I've some free time.
  By the way, if you intend to mount those in the amplifier chassis, be careful. Those high impedance input trannies can pick up quite a lot of noise from the power transformers. Even if they're in MuMetal cans.
  se
I better get to work... - pistoljoe 13:25:54 06/29/05 (0)
Man, Gordon, your stuff is just the coolest. Working on an 300b integrated for my niece's 12th birthday, then to finish up my phono stage for myself. OK, maybe just get the noise floor down some more.
where do you get your toshibas?
you're my hero, Joe

This post is made possible by the generous support of people like you and our sponsors:

You can not post to an archived thread.