[Elecraft] Front end FET of transverter blown with CW configured K2

[W3FPR - Don Wilhelm]

Mark,

Either you did not correctly describe the situation, but that transverter
must work in CW mode too, and yes, it makes no difference whether the CW dot
paddle or the PTT switch is presses when in CW mode, a string of dots should
emerge.

The XV50 transverter should be able to follow the T/R switching of the K2
with no problem and no damage to the transverter, unless you have some
strange connection on the antenna side of the transverter.

73,
Don W3FPR

> -----Original Message-----

>
> OK, guess Murphy forced me to screw up twice this week :))
> So another mistake I would like to share with you all.
>
> Observation:
> 20dB lost in receiver performance at your transverter, no C1 adjustment
> possible (Elecraft XV50 kit)
>
> Cause:
> Q3 PHEMT ATF34143 defective
>
> How did I manage that:
> K2 configured in CW , with no RX delay and Iambic keyer set in the menu.
> The PTT line from your mic is also the 'dot' line for your internal keyer.
> When pressing the mic's PTT in CW mode, the K2 starts sending dots in full
> BK.
> Your transverter will try to follow the quick TX/RX switching , but since
> there is also little or no RX delay, the front end FET will go to heaven.
> Normally you would not press the mic while in CW mode, but trying
> to locate
> my other mistake (max ALC reading in SSB) I
> Both my A and B version K2's do this.
> Again human error here, but we're learning :))
>
> '73 Mark, PA5MW
>
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