[Icom] IC-706 R511 What is it?

Thu, 06 Mar 2003 14:31:06 -0500

Noted this effect on both the Hand mic and D-104.  The D-104 is always
stornger with compressor off, but this adjustment made a definite difference
on both mics.  

I am trying to find out what R511 is controlling: modulation, ALC, RF
Pwr...?

* -----Original Message-----
* From: Kurt W. Zimmerman [mailto:[email protected]]
* Sent: Thursday, March 06, 2003 11:36 AM
* To: '[email protected]'
* Subject: RE: [Icom] IC-706 R511 What is it?
* 
* 
* Larry;
* 	Are you using a stock mic with the 706?  I've been 
* using the Heil HS-706 with real good audio reports.....
* Kurt - W2MW
* 
* -----Original Message-----
* From:	Lefczik, Larry D [SMTP:[email protected]]
* Sent:	Thursday, March 06, 2003 10:20 AM
* To:	'[email protected]'
* Subject:	[Icom] IC-706 R511 What is it?
* 
* I went to mods.dk and found the latest mod for the 706 (orig) was to
* increase SSB power by adjusting R511.  Well, as we know, SSB 
* audio has been
* a problem with the 706 since it hit the market, so I had to try it.  I
* applied a signal to the mic input with the compressor OFF and 
* watched a Watt
* meter as I adjusted the trimmer.  At full rotation, the meter 
* moved from
* about 40 Watts to 80 Watts, matching that of the maximum CW 
* signal I could
* achieve from this radio.  On the air reports indicate a clean 
* signal, no
* overdriving the audio.  
* 
* When I see an adjustment like this I wonder, why is it not 
* adjusted to this
* point at the factory?  Does anyone know what R511 does?
* 
* NJ2L
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* 
* ----
* Your Moderator: Dick Flanagan W6OLD, [email protected]
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* 