[R-390] Signal Amplifier Needed

[Roy Morgan]

At 12:58 PM 3/22/2004 -0600, you wrote:
>  ... use the "high-power" output on the signal to drive
>the counter while using the attenuated output for the radio.

Barry,

The X200K one.. oh yes. You didn't say you had a URM-25 (I assume you 
do.)  It appears to me from the schematic that both the X200K output jack 
and the attenuator have signal when the output switch is in either of the 
X200Kpositions (10 kc to 300 kc or 300 kc to 50 mc.)

Note, however, that the connection from the high level output to the 
counter, and then inside the counter can/will leak a lot of signal... so if 
you are doing low level sensitivity measurements, do not use the high level 
output and cap it off.  With even moderate leakage, it's possible to 
"measure" receiver sensitivities that are unbelievably low!  (Leaked signal 
travels from the high level output and wire and counter to the receiver 
input and adds to the very low signal from the generator attenuator.

Roy



- Roy Morgan, K1LKY since 1959 - Keep 'em Glowing!
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