[Amps] [rfamplifiers] which cathode choke?

[jeremy-ge]

Id lean to the B&W, it gives you almost 500 Ohms Xl at 160 which is OK. 
Bypass the filament transformer end with .05 to .1 uF discaps. Ive no 
idea what the MFJ's intended use is.

The homebrew will work also but you will have to keep an eye on the 
voltage drop.

Carl
KM1H

----- Original Message ----- 
From: "Steve Flood" <kk7uv at bresnan.net>
To: <rfamplifiers at yahoogroups.com>; <amps at contesting.com>
Sent: Sunday, December 21, 2008 8:19 AM
Subject: [rfamplifiers] which cathode choke?


I have three different bifilar wound ferrite rod chokes.

A homebrew choke measuring 127uH
A B&W FC-25A measuring 44uH.
An Ameritron/MFJ #10-15115-1 measuring 19uH.
The measurements were taken on one winding with an Elenco LCR meter.

Which one would best for grounded-grid 813's operating 160m thru 20m?

Thanks, Steve KK7UV