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Author Topic: Mirage KP-2/440 Control Unit - Hi SWR  (Read 2682 times)

AA2BN

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Mirage KP-2/440 Control Unit - Hi SWR
« on: December 07, 2007, 09:39:29 PM »

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
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