[AMPS] Splatter

[Rich Measures]

>In message <PKUw4HABVmmzEwFZ@ifwtech.demon.co.uk>, "Ian White, G3SEK"
><G3SEK@ifwtech.demon.co.uk> writes
>>...snip......... Also
>>the 91b has a low-impedance grid bias supply, so small amounts of grid
>>current do not spell IMD "nutsville".
>
>I'm learning a lot here, ...snip,,,

Yes, but does it wash?  When a tube with a high output-R (100k ohm) bias  
supply is temporarily overdriven by a voice peak, the negative grid bias 
voltage temporarily increases due to grid-rectification and the resulting 
E=I*R drop across the 100k resistance, so the grid becomes more negative, 
so grid current tends to decrease, which limits IMD-genenrating grid 
current.  OTOH, with a stiff grid bias supply, overdrive produces high 
grid current.  ....... Does increasing grid current in Class AB1 increase 
or decrease IMD?  
Rich---

R. L. Measures, 805-386-3734, AG6K   


--
FAQ on WWW:               http://www.contesting.com/ampfaq.html
Submissions:              amps@contesting.com
Administrative requests:  amps-REQUEST@contesting.com
Problems:                 owner-amps@contesting.com
Search:                   http://www.contesting.com/km9p/search.htm