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Re: 6V6 Parafeed with "Robin Hood" iron.

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eelind

(A)

In Reply to: Re: 6V6 Parafeed with "Robin Hood" iron. posted by G on June 08, 2004 at 09:04:08:

wow,makes sense to me now.
Why has C2 disappeared on the 5687 cathode?
If you change your schematics faster than I understand it,
how could I ever build this amp? ;-)

Follow Ups:

Re: 6V6 Parafeed with "Robin Hood" iron. - G 14:03:27 06/08/04 (6)
With the high plate load on the 5687 because of the plate loading choke there is no need to bypass the cathode resistor to lower the plate impedance. So I was able to eliminate the distortion causing cap. In my initial iteration of this design I was going to use a standard plate resistor which made the capacitor necessary. Cheers.
G
- OK - eelind 22:08:52 06/08/04 (5)
  right !
  Clear, simple, easy...should sing like a nightingale (with big chests)
  Any advice before I order the RobinHood and MQ chokes? ? I have almost all the other parts in my dash.And should get rid off of wife and kids in a few days...so I'll have a little time to continue my love affair with my soldering iron...
  Do you or Mike think that 3,3uF instead of3uF could work ? I have a pair of auricaps from paramours, since I replaced them with Jensen copper .
  Eric
  - Re: OK - G 04:07:15 06/09/04 (0)
    Also notice that all of the caps I was/am going to use in the amp are metallized film caps (motor run caps). THey are quite large. I was/am going to stick them to the underside of the chassis (a la Zen amp) with high temp silicone. That means the chassis needs to be about 15 inches across for my layout. You might want to just use electrolytics. Up to you of course. I'm fond of the Zen layout so I will leave you with this link. It may help.
    G
    - Zen amp tutorial. (Open in New Window)
  - Re: OK - G 03:41:14 06/09/04 (3)
    What type of chassis do you plan on using? The schematic of the PSU is obviously not for monoblocks. I was going to use a Zen amp layout like this one kind of. I was going to mout all of the chokes underneath the chassis. Whatever yo do make sure to keep the laminations perpidicular to one another and you should be fine. Michael Perrcy has a nice selection of Mill's WWs and Kiwame carbon films. Keep us up to date. Cheers.
    G
    - Re: OK - eelind 06:25:25 06/09/04 (2)
      lots of informations...
      I understood the PSU caps were motor caps, and, alas, I've had little surprise with them when I tried to replace electolytics in some amp ...not the same size, as you say...So this time,I'll take my time and a large sheet of aluminium. And mount the caps verticaly.As I did not do for my End Of Zen, but like I did for the VTV pre I'm building. If only I knew how to stick pictures in this message, I could show you (proud poppa syndrom ;-)
      By the way, It's funny you are talking about building this 6V6ParaFeed in monoblocks. Kept me awaken this night,as I was thinking of redesigning the PSU for MBlocks. With 5U4GT instead of GZ34. Not that I prefer the 5U4GT, but I have a dozen of them and I don't know where to put them.
      Do you think It's possible to go Mblocks 5U4GT ? Want to try to redesign PSU ?
      Eric
      - Re: OK - G 15:28:32 06/09/04 (1)
        
        In Reply to: Re: OK posted by eelind on June 09, 2004 at 06:25:25:
        
        Hi Eric,
        For monoblocks you would need to change the 75 ohm resistor to 150 ohms and change the 4.7K resistors(or resistor in this case) to 2.5k. If you decide to only use one choke then substitute one with a 270 ohm power resistor and all of the values should stay very close ie +/- 2%. Changing from a 5AR4 to a 5U4G will not make a whit of difference practically speaking. Please post pictures of the build. May your solder flow smoothly :).
        G
        
        Re: OK - eelind 00:26:07 06/10/04 (0)
        
        In Reply to: Re: OK posted by G on June 09, 2004 at 15:28:32:
        
        I already have the Power transformer, and the chokes and the caps It will be stereo block...As soon as I have the answer from Mikey about trx shipment, and as soon as they arrive.
        
        I'll let you know.
        Thanks for this design.
        Eric

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