[Heathkit] SB-220 Problem

[Mike McCarthy, W1NR]

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
>
>