[R-390] Distribution Amplifier

[Roy Morgan]

At 11:34 AM 4/20/2004 -0700, Marshall M. Dues wrote:
>
>         www.w8zr.net/multicontroller/
>
>In speed reading the QST article just now, I did not see a noise floor 
>specification mentioned,

The web site says:
"...Each amplifier has an open loop voltage gain Av=2 (6dB), an input 
resistance of 1.2 Mohm and an output resistance of 0.1 ohm. The output 
noise is specified as less than 5.6nV/(Hz)^1/2, which corresponds to about 
0.16 uV measured in a 1 kHz bandwidth...."

It sounds like these amplifiers will deliver better performance than the 
old tube type or even later solly state multicouplers.  I would expect that 
in any but the most serious noise free locations (such as in the *middle* 
of the outback in Australia) this thing will not contribute any detectable 
noise to the signals you will receive.

(As if I *need* another project, I am considering building one of 
these..  Can anyone report the approximate cost of the Mouser order for 
parts???)

Roy

- Roy Morgan, K1LKY since 1959 - Keep 'em Glowing!
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Home: 301-330-8828 Work: Voice: 301-975-3254,  Fax: 301-948-6213
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