[Elecraft] K2 Iambic b Strange Effect

[Nigel]

Greetings from Down Under.

With the help and encouragement of the NZ K2 guru Ron, ZL1TW, I have finally
got on the air with K2 Nr 3029.   Getting back on air after 40 years I
decided to learn iambic keying so have used my K2 in test mode often for
practise.   I find that on some occasions when I have closed both paddles at
"exactly" the same time and held them squeezed I get a steady tone rather
than alternating dots and dashes. 

I can repeat this in operating mode and have confirmed that power is being
delivered into a dummy load like if a straight key was held down.   Needless
to say it does not happen very often and is an operator error which I
correct, but wondered if others had experienced this too?   I have found
that by pointing both index fingers at the paddles, one on either side then
aiming to push them together simultaneously is a way of effecting this and
even then it will take maybe 10 or so tries to make it happen. (BTW this is
not how I send ;-))

My K2 has firmware 2.03d   1.07.  has the Temp-compensation PLL mod fitted
but not the Keying bandwidth mod.  Installed are KNB2, KAF2 and KAT2.    InP
= PDLn, Iab = b and the keyer is set to 15wpm.

Regards

73s,  Nigel ZL2DF