[Elecraft] KTCXO3 obsolete?

[Edward R Cole]

If the new KSYN3A makes the TCXO-3 obsolete then the EXREF is also 
obsolete and all of us that invested into that either cannot upgrade 
to KSYN3A or we lose the use of these improvements.  That is not 
backwards compatible. I seriously doubt that the TCXO-1 or TXCO-3 is 
not used by the new synth.

I use my K3 as IF rig for 1296-eme and "slopping" around 50 to 500 Hz 
is not acceptable!  OK, I exaggerate a little.

But not only is the TCXO-3 more stable it is also more 
accurate.  With addition of EXREF I get 28-MHz +/- 2-Hz accuracy 
which a big help when looking for super-weak signals on 1296-eme (my 
1296-28 transverter is PLL with < 1-Hz*).  Running JT-65 (not HF) on 
eme requires less than 20-Hz drift when operating key-down for 50 
seconds out a 2-minutes.  I get that using the K3 w/TCXO-3+EXREF.

*PS: frequency drift = K3 drift + transverter drift (its additive)

73, Ed - KL7UW
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