[TenTec] 9420 power supply

[Jim Brown K9YC]

On Fri, 4 Jun 2010 15:08:31 -0400, Harry Coates wrote:

>Would anyone happen to have a 9420 ps they're not using anymore?

I've never owned one, but my Hercules II runs quite well from any good 
solid power supply that puts out 14V at 80-90A. My first solution was a 
pair of Astron RS70s, each dedicated to half of the outputs. The power 
plug is wired so that is quite easy to do. The RS70s have a voltage 
sense terminal that allows them to be strapped together, and I use it. 

My second solution is a big switching power supply that a friend gave 
me after I loaned him the Herc II to take on a DXpedition. It's a LOT 
smaller and a LOT less weight, but with enough output to run the amp at 
full power. He used it on the DXpedition, and gave it to me when he 
returned the amp. 

A third solution I've seen folks use is to run the amp from a big 12V 
battery that is float-charged by a well regulated supply big enough to 
keep the battery charged with the TX duty cycle. I've done this with my 
transceivers for years. AA7JV, who, with HA7RY runs VERY good 2-man 
DXpeditions to remote islands, used six 12V car batteries and float 
charger to run his 500W amp for nearly a month. Because the power 
supply was relatively small, they were able to run their small 1.5kW 
Honda generator in economy mode, and got by with a ridiculously small 
amount of gas. That was critical, because they were on a very small 
boat. See http://www.tx3a.com/  I met George, AA7JV, in Dayton and 
heard his presentation about the trip. 

73, Jim K9YC