[Heathkit] SB-220 Problem

[lboekeloo at sbcglobal.net]

Hooked the amp up to the rig today and played with the relay.  The relay has
a little play in it and when the contacts didn't land exactly where they
should they didn't make a good connection.  I burnished the contacts and it
seems to be working fine.  I have a new and used relay for the SB-220 that
I'll replace some cold, snowy winter night.

Thanks for everyone who responded and gave me some tips.

Larry, KN8N

-----Original Message-----
From: Mike McCarthy, W1NR [mailto:lists at w1nr.net] 
Sent: Tuesday, December 18, 2007 12:03 PM
To: Larry Boekeloo
Cc: heathkit at mailman.qth.net
Subject: Re: [Heathkit] SB-220 Problem

The SB-200 and 220 have reversed polarity on the antenna relay 
connection.  I think the 200 is negative and the 220 is positive.  There 
could also be a bad connection on the RX side of the relay as well.  See 
what happens with the relay disconnected to determine if it is a 
polarity issue.  Then try burnishing the contacts of the relay to see if 
it receives any better.

Mike, W1NR


Larry Boekeloo wrote:
> I purchased an SB-220 a few months ago and just got around to hooking it
up last night.  I installed it in place of my SB-200 with the same cables,
etc.  When I power the transceiver up, I have no receive.  It acts as though
the antenna connection in the SB-220 is to ground.  Anyone else experience
this or know where I should look before I tear into this?
>    
>   Thanks.
>    
>   KN8N
>
>