Bob,
Somewhere in the transmit signal path, the signal is being lost - the trick
is to find out where.
If you have not yet done so, build the RF probe from the parts that came
with your K2 and then look at the K2 manual - Transmitter Signal Tracing on
page 12 of Appendix E. Follow those steps to discover where the problem
area is, and then we can help isolate the failed component for you.
Sorry, but all we can conclude at this point is simply that "It doesn't
work!", and the list of potential causes is very large - in fact it includes
everything in the transmit chain.
73,
Don W3FPR
> -----Original Message-----
>
> I posted,a few days ago an inquiry about a PA problem with my K2
> Till now no return!
> But I have a lot of changes since this post. The two PA Xstors
> finished with junction B/E open.
> After changing both of them with two new ones, the same reactions
> happend, that is very low output on 1.8, 3.5, 7.0, nothing on 10.1 and up.
> Whenever I try to key the Tx during some seconds, with power set
> at 2 watts, the curent start at 0.7 Amp for a few seconds, then
> go up to limit with High Cur indication.
> The power out goe down during this time !
> I still had another pair of 2SC1969 to change, but the
> resultswhere the same...!!!
> So I am lost. This K2 was working nicely and that incident happen
> suddunly just after turn on in the morning with a brutal howlin
> the speaker, and after turn of followed by turn on the apparition
> of this no fonctioning !
> Who can help me pse?
> F5UL/Bob
>
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