On Fri, 8 Oct 2004, Ernest L. Gunerius wrote:
> Hi All;
> Thanks Alan for bringing this subject to the list.
This has definately been an interesting diversion from SuperMacs and yet
somewhat fitting. I too have my amateur (ham) radio license though have
only had it for the past 4 years (did it at Dayton no less). To keep this
somewhat related to Supermacs, I purchased those $20 C500's from the
Harris guys at Dayton Hamvention. Whatever use they had for them they did
not use them very long. (Harris is a fairly old company that made mixing
consoles for radio stations amongst other things).
> amplifier using 6550's as the output tubes. As I remember, I used a
> Starved Pentode circuit for the front end input amplifier which then
> drove a dual Triode Long-Tailed Pair which drove the output 6550's
> which were biased AB1 for an output of 100 watts, flat and stable
> from 5 cps to 100 kcps (cps= old speak for Hertz).
Which begs the question, what were you doing that you needed that range?!
Better yet, did you have anything that would take advantage of that range?
I'm guessing something in the circuitry helped keep it that flat, but
given the inablity for most amplifier manufacturers to build something
flat across that range, why did it not take off? The only thing I can
think of that comes close to meeting those specs are my Magnaplanar
speakers. The specs state they're +-3db from 30Hz to 17kHz. They sound
great even if they're a bit ineffecient (IIRC, 87db 1w/1m). I happened
upon a good deal, otherwise I'd not own a pair. To paraphrase Ferris
Bueller, if you have the means and ways I'd highly recommend them, they're
so choice.
I'd love to have a McIntosh amp but I'll settle for my Yamaha (for now).
FWIW, in the lore of Apple Computer Steve Jobs was a McIntosh fan... which
has obvious implications to both the company name and the product.
I'm old enough to remember replacing tubes in the TV, but young enough
that the next TV was solid state (as Zenith pointed out on the front). We
were a Zenith house with a Zenith shop in a town of 5,000.
I recently aquired some amateur radio heathkit stuff. One is a more code
(CW) rig, the other is a RF linear amp for 2 meters. Fun stuff.
Sean...
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