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In Reply to: Re: I seem to recall the late Harvey Rosenberg... posted by terryc23m03y45 on January 11, 2006 at 17:09:22:
Harvey was very much in the thrall of SETs. In a typical SET amp, you will find a lot of transformers and inductors. He decided that the low voltage (LV) supply for the output circuit in the M60 (i.e., the power supply for the circlotron) needed some added inductance for additional smoothing. Ralph likes to use a bank of capacitors only (no resistors or inductors) for this purpose (see below). So Harvey installed inductors in his M60s, to create a CLC type of filter in the LV power supply. He then wrote in PF that this mod effected a huge improvement in the sound of the amplifier and moreover that he no longer cared for the sound of the unmodified M60, before he moved on to his next obsession. Ralph did not appreciate this very much, because he felt that his own experiments revealed that the introduction of any device into the filter (R or L) that increased the impedance of the LV supply had a negative effect on the sound quality of the M60. Then when Ralph continued to quote Harvey's original ecstatic review of the M60, this in turn upset Harvey who by then no longer had the M60 at the top of his list. Sic semper audiophilius.
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Follow Ups
- What Harvey did... - Lew 08:28:40 01/12/06 (2)
- Re: What Harvey did... - Legendre 17:27:06 01/12/06 (1)
- Re: What Harvey did... - Lew 07:49:38 01/13/06 (0)
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