>In response to Rich's guess reduced Q would hurt matching
>range.......for a the ETO Q of 5.3 into 50 ohms..... and pi- tank
>inductor fixed at 21.57 uH and L inductor fixed at 7.255 uH.....
>
>760 ohm load, Cp 600 pF, ...
...snip...
The output R (RL) of the pair of 8877s is approx. 3750V/(2A*2)=938 ohms.
Since Q is defined as RL/XC1, and Q is given as 5.3, the reactance of C1
(which Mr. Rauch refers to as 'Cp') would be 938 ohms/5.3 = 177 ohms. At
1.9MHz, C1 is 477pF.
- 600pF does not check out.
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
|