[Hammarlund] SP 600 BANDSPREAD

[Joe Connor]

Rich:
 
    Here's a great webpage on the overhaul of an SP-600. It includes a section on IF and RF alignment.
 
http://www.radioblvd.com/sp600_rebuild.htm
 
     When you speak of lack of sensitivity, my first question is whether this set contains black beauties or other paper caps. Leaky paper caps can certainly kill sensitivity. An SP-600 contains more than 20 coupling and bypass caps in the RF deck alone.
 
     When you talk about the set being off-frequency, how far off is it and is it like this on all bands?
 
     These are great receivers and well worth the effort required to get them up and running.
 
 
                      Joe Connor
 
 
 


>________________________________
>From: Pat & Rich McKinney <pmcknney at bellsouth.net>
>To: hammarlund at mailman.qth.net 
>Sent: Sunday, September 23, 2012 3:13 PM
>Subject: [Hammarlund] SP 600 BANDSPREAD
>
>DE WB4VFN RICH
>    I'm working on a SP600 jx-1 for a friend.  I have a question about the tuning.  Is it right for the bandspread dial to not land on zero at each even mc on all bands.  I don't see how it can.  If that is the case where is it supposed to zero on an even mc?  The old thing is not very sensitive at all and way off frequency.  So I guess an alignment is in order.  Any help appreciated to get this old boat anchor back in service.  73  Rich
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