[Heathkit] sb200/220 fan

[Jim Shorney]

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On Sat, 30 Nov 2002 11:10:56 -0500, Carl Huether wrote:

>Rich and I have a serious disagreement with what causes some events.
>I, for one, do not believe in ghosts nor magic parasitics that manifest
>themselves particularly when the tubes are in full cut-off.


Not to get into a debate here, but much of what Rich says sounds
logical and reasoned.


>See your NCL-2000 schematic for the proper way to mitigate that effect.


Could you be a little more specific?  I'm not an engineer.


>C. You will find VHF resonances in any amp.


And this is a reason not to try to minimize thier effect?  Not really
trying to be argumentative here, I really would like to know.  Rich's
surpressors do seem to work as advertised, at least according to
anecdotal evidence.  Just because something is there doesn't mean it is
right or proper, IMHO.


>The internal tube structure is
>the biggest one and the parasitic suppressor is designed for that purpose.


Technology in almost every other area of radio electronics has improved
greatly over the last 50 years.  You're saying parasitic surpressor
technology hasn't, or can't improve?  Please explain.

>Funny looking magic parasitic cure-alls do nothing except generate revenue.;
>they address the symptom and not the cause.

Ah, much like the war on drugs.  I can see your point.  OTOH, I always
thought the 'standard' parasitic surpressor was funny looking too. 
IMO.  There is some merit to treating symptoms as well as causes; It
also seems to me that improved surpressors DO indeed treat the cause,
if you read Rich's theorys.


>Carl
>National Radio 1963-69
>Part of NCL2000 Design Team


Pleased to meet you.  The NCL2000 has always been my favorite amp. 
Works nice, and it's 'pretty'.


>I currently offer repair and modification services to any amp, HF thru
>Microwave


What sort of mods are kicking around for the NCL2000?  I've never seen
any (aside from Rich's), so I always assumed that it was 'done right'
from the start.  Perhaps we should take NCL discussions off-list, since
it is OT.

Again, I'm not trying to be argumentative.  I'm just reading everything
I can find and trying to suss this all out.  I've had the NCL for many
years, the L4B is a recent acquisition (and my first 3-500z amp).

73

Jim

- --
Jim Shorney      -->.<--Put complaints in this box
jshorney@inebraska.com
nu0c@amsat.org
Ham Radio NU0C
Lincoln, NE, USA
EN10PT
http://incolor.inetnebr.com/jshorney/
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