In article , Adrian
wrote:

Question here for Richard and his wealth of experience, with all welcome
to comment of course;

Does the capacitor bypass techniques described in:

http://www.bunkerofdoom.com/lit/zener/index.html

,have a useful improvement in rf amplifier imd, or have any merit in
your opinion?

• I've never done an A/B test to see if a substantial bypass C helps
Adrian but since a g-g 3-500Z is quite linear as long as its ZSAC is 75mA
to 100mA, there can be a fairly wide variation in bias potential before
distortion enters the picture.



I took your advice on 10 ohm cathode resistors (unbypassed) in a cathode
driven sweep tube amp here, and 40m imd performance was substantially
improved.

• good news.

Thanks for the sb220 improvements also, very beneficial on a HL2200 I
had in the past.

ur welcome Adrian

cheers

vk4tux

--
Richard L. Measures. AG6K, 805-386-3734, www.somis.org