[AMRadio] SP-600

Larry Will lhwill at verizon.net
Fri Dec 29 17:56:56 EST 2006


Be sure the HF oscillator tube V4 the 6C4 is fresh.  These tubes have 
a history of aging so that high end alignment can be off.

Beyond that some caps may have changed values.  Is it the higher 
bands that are giving trouble?  If so my 6C4 idea may be important.


At 05:26 PM 12/29/2006, you wrote:
>Thanks Larry.  I have just run into yet another problem that may be 
>even more involved.  It seems while adjusting the oscillator during 
>the alignment procedure it will not reach the upper limits of the 
>band as needed.  If it were the R-388 or similar I'd say she needed 
>the PTO end point adjusted, but this is a horse of a different 
>color.  I wonder if this is a common problem with the SP-600?  Any ideas?
>Larry Will wrote:
>>That may be within 1 gear tooth,  I am not sure.
>>Mine is maybe 1/4 division off.
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