[TenTec] close talking was Scout,Omni,TS 850 transmit

[bstephens1@mindspring.com (robert k stephens)]

George's research into the frequency response of the Argo explains the
situation well. The Argo (Scout) has a peak at the lower frequencies with a
slowly declining curve in the communications range. Close talking (2
inches) or even moderately close talking (4 inches) into the hand mic
reinforces and exacerbates the Scout's tendency to be a little bassy. There
are 2 ways to fix this. I can buy a mic that either has a rising frequency
response or a mid frequency "bump" (D-104, Heil HC4 and HC5 or perhaps the
Shure 444. The other way would be to take your advice and change the
capacitors. Changing the capacitors would be cheaper and from an
engineering viewpoint probably more elegant, but there is one problem.
Although I know how to solder I dislike soldering. I'd rather wash dishes
than solder stuff<g>. So, I'll be making a mic purchase.

On the other hand I love tubes and presently have a DX 60 and Drake 2B
waiting for me to fix. Hopefully my love of tubes will overcome my aversion
to soldering and I'll be changing the caps in the tube rigs soon- but
that's a topic for another list.


73 Bob, KB1CIW

 At 11:58 AM 8/25/02 -0500, you wrote:
>So dig into microphone or radio and find an audio coupling capacitor in
>the transmitter. Take it out and put on in that is half its size. That
>will double the roll off frequency for the bass.
>
>Close talking in a noisy situation does improve the signal to ambient
>noise from the microphone.
>
>Or adjust the BFO setting to be further from the corner of the transmit
>(and probably the receive) filter. That will also improve the carrier
>suppression.
>
>73, Jerry, K0CQ
>-- 
>Entire content copyright Dr. Gerald N. Johnson, electrical engineer.
>Reproduction by permission only.
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