[AMPS] Henry 3KA mod for 160m

[Phil Clements]

>
> >Hello amp experts! Wonder if anyone know how to modify Henry 3KA to cover
> >160m band. If this problem is already covered by any past posting, please
> >let me know.
>
> The 3K-A has two bandswitch positions for the 3.5MHz band, so converting
> it to 160m operation is a bit easier than say converting a SB-220.
> However, a dpdt vacuum relay will still be needed for doubling the
> existing C and L.
> >
You will also need another plate choke. I use the Henry 8-K chokes here.
You get 2 chokes and a relay to switch  them with the Henry assy. Another
good choke is the Ameritron plate choke for the AL-1500. Not as much L
on 160, but if you use enough bypass C at the base, it is passable.

GL!
Phil, K5PC




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