[Icom] IC-706 R511 What is it?

Thu, 06 Mar 2003 15:23:24 -0500

Do you have a schematic with the manual? What circuit is R511 in?

Lefczik, Larry D wrote:

> 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
> * ----
> * Your Moderator: Dick Flanagan W6OLD, [email protected]
> * Icom Users Net: Sundays, 1700Z, 14.315 MHz
> * Icom FAQ: http://www.qsl.net/icom/
> * 
> * 
> * ----
> * Your Moderator: Dick Flanagan W6OLD, [email protected]
> * Icom Users Net: Sundays, 1700Z, 14.315 MHz
> * Icom FAQ: http://www.qsl.net/icom/
> * 
> ----
> Your Moderator: Dick Flanagan W6OLD, [email protected]
> Icom Users Net: Sundays, 1700Z, 14.315 MHz
> Icom FAQ: http://www.qsl.net/icom/
> 
> 