[Johnson] Courier amplifier
Robert Sauvan
rsauvan at beyondbb.com
Sat Sep 17 12:40:37 EDT 2016
Hi all,
I just got done refurbishing a Courier amplifier but I am having some
loading issues with it. Im hoping someone has had a similar issue or
some experience with these amps that can possibly give me some advice. I
put a new transformer in it, along with all new electrolytics. It has
572B finals and 3B28 rectifier tubes. I am driving it with a Ranger II.
What happens is this: I can load it up fine on 80 meters. Grid current
is correct and adjustable. Power output is nearly 400 watts. On all
other bands 40-10 meters I am only able to get 100 watts out if Im
lucky. Grid current is very low. Supposed to be 60-80 ma but I only get
maybe 20ma. I cant seem to get any more than that. I was also told to
put my swr/power meter between the Ranger II and the Courier to see what
I get there. On 80 meters, swr is fine at 1.5-1 or less. On 40-10 meters
it is off the scale. Dont know what that means. Any suggestions/help in
this would be greatly appreciated. The amplifier can be seen on my
website- W0YBS.com
Thanks-Bob-W0YBS
--
Thanks
Bob Sauvan-W0YBS
rsauvan at beyondbb.com
http://w0ybs.com
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