[Elecraft] K1 no output power

[Don Wilhelm]

  Lorenz,

Check the core that was used for T4,  There were a few kits which were 
shipped a few weeks ago that contained a T50-10 powdered iron core 
instead of the FT50-43 ferrite core - I happened to build one of those

The incorrect core has black paint while the correct ferrite core has a 
slightly dark gray appearance.  If you ordered the KAT1, look at the 
ferrite core shipped with it for visual comparison of the appearance 
(the size will be smaller).

There were only a few kits shipped with this error and when I discovered 
the problem, the kind people at Elecraft checked all the kits in stock 
and found them to be correct.  We concluded that this was a one-off 
error, but apparently there were a few more.

If the core was incorrect in your K1, contact parts at elecraft.com with a 
brief explanation and you should receive a new core and a new PA 
transistor under the terms of the parts warranty.

73,
Don W3FPR

On 10/17/2010 4:39 PM, Lorenz Koestler wrote:
> Hi
>
> I build a K1 (80m, 20m) during the last days and had a lot of fun! The
> manual is just awesome and I am looking forward to make my first qso
> with it.
>
> Now I have a problem with the tramitter. That is why I joined this list
> and I was very glad to see, that there is much activity.
>
> The rx alignment went well and the resistance and voltage checks of the
> tx part are all fine.
>
> When I first started the tune mode on 80m with 2 watts, it shows me
> somewhat like 1.7, Q7 became quite hot and something started smelling. I
> was not able to read the current consumption before I disconnected the
> source.
>
> After double-checking all resistor values, the orientation of all diodes
> and ICs and the transformers, I tried it again.
>