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Author Topic: Heathkit HB-200 renovation  (Read 51382 times)
AG6K
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« Reply #90 on: October 24, 2011, 04:45:10 AM »

Quote
Drank the cool aid.   Huh

  chortle
Rich, ag6k

“The combination of both resistance and inductance is very effective in limiting parasitic oscillations to a negligible value of current.”

- -  F. E. Handy, W1BDI    1926 Ed.  The Radio Amateur's Handbook,  p. 72.
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W1QJ
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« Reply #91 on: October 24, 2011, 06:02:21 AM »

Quote
Drank the cool aid.   Huh

  chortle
Rich, ag6k

“The combination of both resistance and inductance is very effective in limiting parasitic oscillations to a negligible value of current.”

- -  F. E. Handy, W1BDI    1926 Ed.  The Radio Amateur's Handbook,  p. 72.

With the resistance being part of the inductor itself or a seperate of the inductor? 
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W8JI
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« Reply #92 on: October 24, 2011, 06:59:48 AM »


With the resistance being part of the inductor itself or a seperate of the inductor? 

Lou,

Why waste time arguing with someone who everyone, from tube manufacturers down through the entire technical system, can't reach? It's like arguing religion instead of science.


73 Tom
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AI4NS
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« Reply #93 on: October 26, 2011, 09:10:43 PM »

Quote
Drank the cool aid.   Huh

  chortle
Rich, ag6k

“The combination of both resistance and inductance is very effective in limiting parasitic oscillations to a negligible value of current.”

- -  F. E. Handy, W1BDI    1926 Ed.  The Radio Amateur's Handbook,  p. 72.

Why the constant reference to a book that is 90 years old? I  am sure that we have discovered some things since then...
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AG6K
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« Reply #94 on: October 31, 2011, 08:29:18 AM »

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W1QJ
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Posts: 585


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RE: Heathkit HB-200 renovation
« Reply #91 on: October 24, 2011, 06:02:21 AM »
   
Reply with quoteQuote
Quote from: AG6K on October 24, 2011, 04:45:10 AM
Quote
Drank the cool aid.   Huh

  chortle
Rich, ag6k

“The combination of both resistance and inductance is very effective in limiting parasitic oscillations to a negligible value of current.”

- -  F. E. Handy, W1BDI    1926 Ed.  The Radio Amateur's Handbook,  p. 72.

With the resistance being part of the inductor itself or a seperate of the inductor?

   R is built-in with resistance wire Lou.  Another way to improve the performance (decrease VHF-Q) of a VHF suppressor is to increase L-supp, and increase R-supp - but that increases the dissipation in R-supp and nobody makes c.10nH resistors in more than 3w rating -- so Ni-Cr wire is a workaround to avoid destroying the suppressor with 28MHz A0. . 

cheers
Rich, ag6k 
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AG6K
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« Reply #95 on: October 31, 2011, 08:42:54 AM »

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AI4NS
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RE: Heathkit HB-200 renovation
« Reply #93 on: October 26, 2011, 09:10:43 PM »
   
Reply with quoteQuote
Quote from: AG6K on October 24, 2011, 04:45:10 AM
Quote
Drank the cool aid.   Huh

  chortle
Rich, ag6k

“The combination of both resistance and inductance is very effective in limiting parasitic oscillations to a negligible value of current.”

- -  F. E. Handy, W1BDI    1926 Ed.  The Radio Amateur's Handbook,  p. 72.

Why the constant reference to a book that is 90 years old? I  am sure that we have discovered some things since then...

  Has Ohm's Law changed since 1926?
Rich, ag6k
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AG6K
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« Reply #96 on: October 31, 2011, 08:55:53 AM »

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W8JI
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RE: Heathkit HB-200 renovation
« Reply #92 on: October 24, 2011, 06:59:48 AM »
   
Reply with quoteQuote
Quote from: W1QJ on October 24, 2011, 06:02:21 AM
Quote from: AG6K on October 24, 2011, 04:45:10 AM

With the resistance being part of the inductor itself or a seperate of the inductor?

Lou,

Why waste time arguing with someone who everyone, from tube manufacturers down through the entire technical system, can't reach? It's like arguing religion instead of science.


73 Tom

   Amen Tom R.  Organized religion has it's gurus like Oral Roberts, David Koresh, Lafayette Ronald Hubbard  and Jim Jones with their  faithful groupies in tow, while amateur radio has its "recognized amplifier experts" with their faithful groupies.   
Rich, ag6k
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K4RVN
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Posts: 261




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« Reply #97 on: October 31, 2011, 01:10:11 PM »

Rich, you should have said had, not has for the religious contributors to our history that you mentioned.
Those guys are history I think. Christianity is not.
Remember what honest ABE said, I forgot already something like "You can fool  etc."


Frank
« Last Edit: October 31, 2011, 01:29:41 PM by K4RVN » Logged
AG6K
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Posts: 1




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« Reply #98 on: October 31, 2011, 01:35:30 PM »

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K4RVN

RE: Heathkit HB-200 renovation
« Reply #97 on: Today at 01:10:11 PM »
   
Reply with quoteQuote
Rich, you should have said had, not has for the religious contributors to our history that you mentioned.
Those guys are history I think.
Remember what honest ABE said, I forgot already something like "You can fool  etc."


Frank

  History indeed. Frank - but the salvation businesses they ran succeeded in fooling many.

"You can fool some of the people some of the time but you can't fool all of the people all of the time". -- Abraham Lincoln

"Lord, what fools these mortals be!" -- Puck.
--From A Midsummer Night's Dream (Act 3, scene 2 i, 115) by Wm. Shakespeare
cheers
Rich, ag6k
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K4RVN
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Posts: 261




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« Reply #99 on: November 02, 2011, 05:47:39 PM »

Rich,
I went over to where Willie used to meet Anne in her cottage in SOA. However that is much to do about nothing so I'm done now.

Frank
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AG6K
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« Reply #100 on: November 03, 2011, 03:07:11 AM »

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W1QJ
   
RE: Heathkit HB-200 renovation
« Reply #14 on: September 16, 2011, 08:51:00 AM »
   
Reply with quoteQuote
IMHO....The single most NEEDED mod to Heathkit amps is the soft key.  You NEED that (in one form or another).  The soft start can't hurt but after 40 some years that many of these amps have been running it makes you wonder?  After many years carbon comp resistors change value just with age as well as heat effects.  Going to voodoo magic is not the answer.  Stay with a new carbon comp or a MOF and keep same design....

  OTOH, you might want to go to a 572B supplier's Website and see what he says about parasitic suppression for 572Bs:
http://www.rfparts.com/572bprices.html
Rich, ag6k
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