Tube DIY Asylum

RE: Question about Marantz 7 circuit

76.90.100.230

Tre'

In Reply to: RE: Question about Marantz 7 circuit posted by Tube747 on February 03, 2025 at 03:37:48

They are the same except for the volume pot value and the second stage's coupling cap value.

Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"

Follow Ups:

RE: Question about Marantz 7 circuit - Paul Joppa 09:37:53 02/03/25 (3)
Look again - all four(!) of the coupling caps are much larger capacitance in the TTradio circuit.
I assume that the smaller caps are what the original M7 used, and the larger caps reflect a more modern design goal. Do you want it to sound like the original, or "improved"?

Edits: 02/03/25
- RE: Question about Marantz 7 circuit - Tube747 01:10:34 02/04/25 (0)
  Only the midrange that is closed to the original and the other area I tried to improve. I'll see.
  
  I have the unit here and it is a clone Marantz 7 and extremely well built, and it come with tube regulation with 6J1 and 6V6.
  
  What I'm going to do is adding 2 x Salas SSHV2 after the tube regulation for circuit, and my friend order for me, and now on the waiting list. I retain all small caps except the output I will use 0.47uf.
  
  Those 0.01uf I will try the Super Mica that mentioned in the positive feedback articles.
  
  I have some Sprague orange drop PS series 0.22uf that I bought to refurbish my vintage collections (Pilot, Heathkit, Fisher and few others) 2 decades ago.
  
  22AWG Jupiter cloth tinned wire will be used for signal.
  
  I don't know what would it sound like, and I might try to do some treat and see.
  
  Thanks for you guys helps!!
  
  PS. I try to keep all values small instead using large cap.
- RE: Question about Marantz 7 circuit - Tre' 19:58:55 02/03/25 (0)
  I guess I'm getting sloppy.
  
  Tre'
  Have Fun and Enjoy the Music
  "Still Working the Problem"
- Very good question! nt - Ralph 12:15:38 02/03/25 (0)
  -

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