[Heathkit] SB-220 tuning cap arcing

[Gudguyham at aol.com]

I've never seen an SB-220 with a wider spaced tune cap unless it was  
retrofitted over the years by someone.  Even some of the earlier SB-221  amps did 
not have a plug in transformer and wide spaced tune cap.  It seems  that 
somewhere along the run of SB-221 amps they went to the wide spaced cap and  
the plug in transformer.  You have to be careful when looking for an SB-221  
since you may not get one with a wide spaced tune cap or plug in  
transformer.  You can always upgrade the tune cap on an SB-220 with one  from an 
SB-221 or HL-2200.  I have the wider spaced caps in stock at the  present time.  
Also pin #1 and pin #7 on there input bandswitch were  reversed on the 
SB-221.  There were 2 versions of the CB/10 meter trap on  the SB-221 also.
 
 
In a message dated 3/27/2012 4:14:07 P.M. Eastern Daylight Time,  
wa1rkt at arrl.net writes:


Is  arcing at the tuning cap really a common problem with the SB-220?

Would  I be better off to forget about the 220 and try to find a good 
221?   I don't really care about 10 meters all that much.

Some tell me that  all of the 221's and the latest 220's had the 
wider-spacing tuning  cap.  Others tell me that none of the 220's and 
only the later 221's  had it.

It appears that there are many more 220's available than 221's  so if 
I can find a 220 with the wide spaced tuning cap that seems best,  but 
the chances of finding a seller who even knows if he has the wide cap  
seem slim at best, these days...

Thanks...

Rick  WA1RKT

______________________________________________________________
Heathkit  mailing list
Home:  http://mailman.qth.net/mailman/listinfo/heathkit
Help:  http://mailman.qth.net/mmfaq.htm
Post:  mailto:Heathkit at mailman.qth.net

List Administrator: Duane Fischer,  W8DBF
** For Assistance: dfischer at usol.com ** 


This list  hosted by: http://www.qsl.net
Please help support this email list:  http://www.qsl.net/donate.html