Tube DIY Asylum

RE: To transformer or not to transformer

89.253.73.146

In Reply to: RE: To transformer or not to transformer posted by danlaudionut on May 11, 2008 at 12:00:11

I agree with danlaudionut.

I do not know what a Marantz CD-7 is, or care. But by fluke I learned that it has two 220uF, 16V electrolytics per channel on the output.

Transformer-coupling went out of favor when they invented NFB. Transformers mess up things when you use global NFB. But that's not the reason. Much more important is gain. 10db of NFB means you throw away 80% of the gain. So in the 1950s and 60s we got junk like the Leak TL25A, Marantz Model 9 and McIntosh MC275. At least they measure great.

Follow Ups:

RE: To transformer or not to transformer - Peter H-son 09:52:04 05/12/08 (0)
Good Transformers R Hard To Beat !!!!!!!!!!!!!!!!!!! - Interstage Tranny 16:35:27 05/11/08 (8)
- well now !!!!!!!!!!!!!!!!!!! - PakProtector 13:00:18 05/13/08 (0)
- Where to find "hard to beat" vintage irons? - cheap-Jack 10:44:34 05/12/08 (1)
  - RE: Where to find "hard to beat" vintage irons? - PakProtector 13:02:15 05/13/08 (0)
- RE: Good Transformers R Hard To Beat !!!!!!!!!!!!!!!!!!! - DaWoofer 20:16:36 05/11/08 (4)
  - Before you drop a bundle to buy irons, - cheap-Jack 11:18:39 05/12/08 (0)
  - RE: Good Transformers R Hard To Beat !!!!!!!!!!!!!!!!!!! - Ray Moth 03:50:06 05/12/08 (0)
  - RE: Good Transformers R Hard To Beat !!!!!!!!!!!!!!!!!!! - somejoe 02:57:03 05/12/08 (1)
    - Cap v Trannie - andy evans 03:22:14 05/12/08 (0)

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