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Re: [TenTec] Scout 555 MIC Gain Question...

To: Discussion of Ten-Tec Equipment <tentec@contesting.com>
Subject: Re: [TenTec] Scout 555 MIC Gain Question...
From: Bwana Bob <wb2vuf@verizon.net>
Reply-to: wb2vuf@arrl.net, Discussion of Ten-Tec Equipment <tentec@contesting.com>
Date: Sun, 28 Mar 2010 14:00:25 -0500
List-post: <mailto:tentec@contesting.com>
Ben:

No, that is not normal. I run my Scout mic gain between 9 and 10 o'clock. I get plenty of audio and good reports. The Scout seems to do best with low Z dynamic mics. If you are using an electret mic, make sure there is mic preamp voltage from the Scout on pin 4 of the mic jack.


                                73,

                                Bob WB2VUF

Ben Hall wrote:
Good evening all!

I inherited a Ten-Tec Scout 555 transceiver from my father-in-law. He regularly used it on 20 and 40 mobile before he passed away, so I believe it is in good working order.

Certainly, the receiver on it seems to work great!

The manual notes to turn up the MIC gain until the ALC light flashes on voice peaks. With the standard Ten-Tec hand-held microphone, I have to have the MIC gain all the way up and then speak extremely loudly (enough to irritate the XYL in the other room!) to get the ALC light to flicker on voice peaks.

Even though my father-in-law used this regularly, I wondered if perhaps the MIC was going bad. So, I connected up a Ten-Tec model 705 desk-style microphone. I get the same behavior - need to speak very loudly with the mic gain all the way up to get the ALC light to flicker on voice peaks.

So my question is this - is this normal behavior for a Scout, or do I need to open it up and see if something is goofy in the audio input circuitry around U6-B?

thanks much and 73,
ben, kd5byb

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