[Boatanchors] are all 6550's created equal?

[Bill Abate]

  Eugene,

I have a 100V also.  I bought a pair of JAN 6550's.  I also have a pair 
of TungSols.  The JAN's do not have anywhere near the output of the 
TungSols.  The JAN's are not the coke bottle type.  Does that signify 
anything?  I don't know.  Could I adjust tune up to compensate?  Have 
not tried.

The construction and inter electrode capacitance is probably different. 
  If it meant the output circuit had to be retuned, I would give up. 
That 100V passband circuit seems to be more of a black art than a science.

Good luck,

Bill, K3PGB

Eugene Hertz wrote:
> Hi All, I *might* be in need of a pair of 6550's and I was looking around. Seems that these were very popular with audiophiles.  I was wondering if I bought a pair that were advertised from an audio-related company if they are the same and would work for me (ce 100v).  For example, here is a pair on the eplace that seem reasonably priced... thoughts? epay item# 7340864412
> 
> If they are not the same, how could I tell when a 6550 is usable for audio or RF?
> thanks
> Eugene
> 
> 
> 
> _______________________________________________
> Boatanchors mailing list
> Boatanchors at mailman.qth.net
> http://mailman.qth.net/mailman/listinfo/boatanchors
> ** List Administrator - Duane Fischer, W8DBF/W9WZE **   
> ** For Assistance: dfischer at usol.com **         
> $$ For vintage radio info, see the HCI web site $$      
> http://www.w9wze.org    
> 
>