[R-390] Distribution Amplifier

[Bob Camp]

Hi

Well don't throw out all the glow in the dark stuff quite yet .....

The video amplifiers that form the heart of the ARRL project are pretty 
darn nice little chips. However they are not rated for IMD and their 
harmonic distortion numbers begin to climb as you go past about 10 or 
12 MHz. That isn't to say they fall apart. Far from it they probably 
work pretty darn well considering what they are.

What they are not is the tuned RF front end on an R-390. I would be 
very interested to see how they do when attached to a couple hundred 
feet of wire with the bands open ...

	Take Care!

		Bob Camp
		KB8TQ



On Apr 20, 2004, at 1:04 PM, Scott, Barry (Clyde B) wrote:

> Looks like a really well-designed project; however, I'm afraid if I 
> built
> it, I'd start looking for 6 more receivers...
>
> Barry(III) - N4BUQ
>
>
>> Hi, Pete, and ALL,
>>
>> The author and designer of the multicontroller has a neat web
>> site that
>> describes the project pretty well.  Go to:
>>
>> 	www.w8zr.net/multicontroller/
>>
>> In speed reading the QST article just now, I did not see a
>> noise floor
>> specification mentioned, but he is using new Maxim MAX497CPE
>> video amplifier ICs
>> each containing four 275 Mhz low-noise amplifier/buffers.
>>
>> I, too, am very interested in getting his kit and building it
>> for all my receivers.
>>
>> Marshall Dues  WB5MYO
>> Katy, TX
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