[Amps] RF Chokes

[Phil Clements]

> -----Original Message-----
> From: amps-bounces at contesting.com [mailto:amps-bounces at contesting.com] On
> Behalf Of Bill Turner
> Sent: Monday, July 17, 2006 8:45 AM
> To: amps at contesting.com
> Subject: Re: [Amps] RF Chokes
> 
> FWIW, RF Parts sells a choke guaranteed to have no resonances in any
> HF band including WARC for $24.95.
> 
> http://www.rfparts.com/choke.html#highrf
> 
> Scroll down to RFC-3.
> 
> Annoyingly, their minimum order is five cents higher than the price of
> this item. :-)
> 
> Bill, W6WRT

I have used these chokes for years on many projects. These are also used in
all the Ameritron amps. The first resonance is c. 11.5-11.9 mhz, depending
on your mounting environment. The second resonance is well above 30 mhz. I
use a .01 @ 10 kv disk ceramic capacitor at the base of the choke for
bypass.....(.001 is not enough for 160 meters.) 

(((73)))
Phil Clements, K5PC