Hi Folks,
Has anyone using a KP-2/440 pre-amp seen an SWR problem relating to the control box?
When I transmit between 432 and 437 with the pre-amp in line on the mast, but no control box, I get a very acceptable 1.5:1 SWR. With the control unit in line the SWR deteriorates to 4:1 across the same frequency domain.
When I e-mailed MFJ to request a schematic, the document I received bears little resemblance to the actual control unit. Hopefully someone here on the site has a few insights for me before this unit goes to the great recycling bin in the sky.
I purchased this RF switched pre-amp so I could use both U/V and V/U transponders, but if I physically have to disconnect the control unit to switch over it kind of defeats the purpose in having an RF switched pre-amp.
73,
John AA2BN