[R-390] To un-mod or not

[Bob Camp]

Hi

Odd but true - most receivers do not present a 50 ohm load to the=20
antenna. When you pop a radio on to the 455 KHz output of the R-390 you=20=

put a "strange" load on the 455 KHz output of the radio. Like=20
everything else on the 390 it will do better if you align it with that=20=

load in place *if* that's the way you are going to run the radio.

A second thing to play with is the good old IF gain adjustment. You may=20=

find that a lower gain setting will still drive the outboard radio and=20=

give you better overload performance.

Since both of these adjustments are reversible there's not much risk in=20=

trying them to see if they help or not.

	Enjoy!

		Bob Camp
		KB8TQ



On Apr 22, 2004, at 9:35 PM, Tom Norris wrote:

>> On Thu, 22 Apr 2004, D. ball wrote:
>>
>>>  I don=92t plan on selling this radio, the best city radio ever!! =
With=20
>>> the
>>>  kenwood 930 dialed up on 455kc +/- some, and the 390 as the front=20=

>>> end, I
>>>  hear things neither radio can hear by itself. It is a scary=20
>>> combination.
>>
>> You answered your own question...
>>
>
> Even scarier is me using my 756Pro as an IF for my 390A! Talk about
> an "oh boy" combination. It's nice to be able to narrow things down to
> 50 Hz bandwidth to help dig out nearly inaudible CW, and all the other
> whizbang DSP gizmos on the Icom are nice too, like the FFT panoramic
> display. (though at 16 KC wide on the 390A, you only get a teeny slice
> to look at) Now if I could make myself move the room around so both
> radios would be on the SAME SIDE of the room, it would be a lot
> easier to use this setup.
>
> Tom
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