[Elecraft] Using Elecraft KPA-1500 for 2 radios

[Jim Brown]

Not a great choice. SWR gets increasing nasty above 15M because the 
construction uses chassis as signal return rather than carrying it on 
the circuit board. It's a two-sided board, but the "ground" layer is 
broken under the traces that carry the RF, so return current can't flow 
on that layer. I didn't have the heart to try to measure crosstalk.

5-6 years ago, I bought several of them for antenna switching, and 
learned that the hard way. I modified them by paralleling copper braid 
from the connectors to the board and following the RF paths through the 
relays across the board as best I could. That reduced the SWR by about 
half.

I've since replaced all of them, and they're for sale. :)

73, Jim K9YC

On 3/17/2019 6:15 PM, Bill Steffey wrote:
> i use topten a/b coax switches,,,,  to switch between the kpa500 & 
> acom  2000 ... one in front of the amps , one in back ....    also 
> have them switching between K3 & an Icom....
>
> https://toptendevices.com/products/ab-station-selector/