[Amps] Ham Radio Magazine article six 572Bs on 160 meters

[Jim Thomson]

Date: Thu, 10 Jan 2019 11:12:17 +0000 (UTC)
From: Lane Zeitler <lanenavyrn at aol.com>
To: amps at contesting.com
Subject: [Amps] Ham Radio Magazine article six 572Bs on 160 meters

<There was an article in Ham Radio Magazine from the late 1970s, early 80s. The builder had six 572Bs in parallel on 160 meters. An extensive internet search has not found this article. I had a copy for the longest time but 14 moves while in the Navy <contributed to me losing the only copy I had. Trying to find this article. Thank you. Lane Ku7i

##  You can buy matched sets  of 572Bs  in   two-three or four, thats it.     How are you going to match 6 of em ?   Not a practical layout.    Plate load Z would be really low.  Then you require  6 tubes, sockets, anode connectors, suppressors.
And a fil supply to run 6 of em,  plus a bifilar.   Eats up a lot of room on any chassis.   You dont put  6 engs in a truck,   you get a bigger eng.   A single  chinese  8877  or  a GS35B  would make more sense. 

Jim  VE7RF