Critic's Corner

Futterman and NYAL

64.122.72.31

Ralph

In Reply to: RE: They might have made things better, but what about Futterman? posted by David S. on April 16, 2019 at 08:48:12

-Did a pretty good job of convincing the public that OTLs blow up. No debate, unlike solid state/tubes or analog/digital.

Atma-Sphere made the world's first reliable OTLs; impervious to oscillation on any load. Nowadays people are much more likely to accept that an OTL will work. But it took 25 years to get there.

Follow Ups:

My Futterman never blew up - garymuffley 10:13:24 04/19/19 (5)
Have had my H3A since 1987 and it has been utterly reliable. Several friends that have owned the original Futtermans also have had trouble free service over a mult-year period.
- Good! If you treat them right - Ralph 10:19:45 04/19/19 (4)
  -with an easy load, and don't overload them, they can be well behaved.
  
  But put them on an inappropriate load and especially if you clip the amp hard and bad things can happen.
  - RE: Good! If you treat them right - TRUFI 15:05:04 05/16/19 (3)
    The worst OTL amp was from a St. Louis company (can't remember the name, maybe you can Ralph). I owned the Triomphe model. The front-end voltage regulator was always burning up. LoL
    - I had one of those explode in my face - Ralph 08:55:20 05/17/19 (2)
      It wasn't the Triomphe model though. They used a filter capacitor in their power supply marked 'Bindu' which was a really suspect name to find on a filter capacitor; to make matters worse they ran it at about 30 volts over the rated voltage!
      
      Not surprisingly they had a way of blowing off the circuit board... I was lucky; the part missed me and embedded itself in the false ceiling above me and left a mess everywhere. My ears rang for 10 minutes.
      
      I don't blame this on Futterman though; Futterman knew enough to not do something stupid like that. It was just poor engineering. IMO Fourier products cannot be ethically repaired as there is no way to warrant that they will keep working.
      - RE: I had one of those explode in my face - TRUFI 17:16:33 05/24/19 (1)
        
        In Reply to: RE: I had one of those explode in my face posted by Ralph on May 17, 2019 at 08:55:20
        
        Thanks. I believe you were referring to their use of 'photo flash' caps. No pics included, LoL. :)
        
        To the best of my knowledge, it wasn't a photoflash - Ralph 12:54:26 05/28/19 (0)
        
        In Reply to: RE: I had one of those explode in my face posted by TRUFI on May 24, 2019 at 17:16:33
        
        Usually those are marked. I know New York Audio Labs used photoflash caps in their stuff. They were clearly marked 'photoflash' as every other photoflash cap I've seen. These were not- although its obvious they were sketchy; they could well have been since they had a lot of 'capacity' for their size.

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