[Heath] SB 300 help needed

[RAY FRIESS]

Recently picked up a very nice sb-300.  It's the one I asked for help with the bandswitch shaft.  I got it realignedand tonight I plugged in the receiver and connected an antenna.  I am receiving signals just fine, but am having troublewith the AGC circuit I think.  The S-meter is not working on any position the AGC switch is on.  When I turn the switch tooff, or no AGC, I do notice a change in signal strength and the meter pegs to the left.  On fast or slow, there is no metermovement at all, it just sits at zero. Any suggestions?  I only have a partial manual, so I'm somewhat limited because of that.
 Date: Mon, 11 Mar 2013 18:10:40 -0700
From: gzook at yahoo.com
To: pettit at ti.com; heath at puck.nether.net
Subject: Re: [Heath] SB 300 help needed

The band switch in the SB-300 has 8-positions.  1 each for 80-meters, 40-meters, 20-meters, 15-meters, and 4-positions for 500 kHz segments on the 10-meter band.  The SB-301 has an additional band switch position for WWV at 15 MHz. Glen, K9STH

Website:  http://k9sth.com
        From: Dick Pettit <pettit at ti.com>
 To: heath at puck.nether.net 
 Sent: Monday, March 11, 2013 12:00 PM
 Subject: Re: [Heath] SB 300 help needed
   

I believe the bandswitch had 5 positions (80, 40, 20, 15 and 10) and doesn't
rotate any further than that. Set the shaft to far counter clockwise and put
the knob on it pointing to the 80 mater position.


    
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