[Elecraft] Disconnect FCTR probe after finished?

[Vic K2VCO]

Roland wrote:
> Last evening I read somewhat older artikel in this Elecraft Net.
> 
> Is it true that it is better to disconnect your FCTR probe after filter aligments are done?
> My probe is still connected to TP2, this way I can always check/realign filter settings.
> But the possibility is that you can get some spurs?? If so, what could happen?

Leaving the probe in place increases the amount of BFO 3rd harmonic in 
the output on 14 MHz.  There may also be other spurs.  I checked this 
and did notice that the spur became louder when the probe was plugged 
in.  I don't know if the level is high enough to be a problem; most 
likely not with a QRP K2.  But if you have a KPA100 or even a KPA100 and 
an external amplifier, it's probably a good idea to leave the probe 
disconnected.
-- 
73,
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco