[Elecraft] (no subject)

Wed Apr 9 16:05:02 2003

Hi

John is referring to me I think as I checked out his K2 a couple of weeks
ago. At that time it was working fine into a dummy load on all bands >12
watts. John I will be glad to recheck your K2 if you like. I agree with Don
the problem is most likely a poor match on the antenna unless there is an
intermittent in the 20 meter part of the K2, this is unlikely because nearly
all of the same circuitry is used on 30 meters.

Don Brown
KD5NDB

----- Original Message -----
From: "Don Wilhelm" <[email protected]>
To: "john cooper" <[email protected]>; <[email protected]>
Sent: Wednesday, April 09, 2003 1:39 PM
Subject: Re: [Elecraft] (no subject)

> John,
> I don't know which of the several "Don" on this reflector you were
referring
> to, but I will try a response.
>
> First - what is the behavior if you feed a 50 ohm dummy load?  The base K2
> (and most other transmitters too) need a 50 ohm resistive load to work
> properly.  If all is normal into a dummy load the K2 is working just fine.
>
> You can adjust your antenna to produce a 50 ohm feedpoint or use an
antenna
> tuner at the shack end (or both).
>
> The final transistors are quite robust and the K2 will likely not harm
> itself working into a high SWR - it just won't put out spec'ed power
unless
> the load is 50 ohms resistive.
>
> 73,
> Don W3FPR
>
> ----- Original Message -----
>
> my k2 works as advertised on all bands cept on 20m only when i try to
> transmit on cw(no options added) on the lower part of 20m from 14.0-14.200
i
> only get bout 3 bars on the smeter to light even when i  have power all
the
> way up to 15 watts. If i change the display to show voltage and current i
> get bout .28 on recieve to 3.45 on transmit and  occasionally it shows the
> Hi Current message also if i hold the tune  button and adjust the power
knob
> it maxes at 5watts.  if i move to the high end of 20 meters around 14.300
> lets say i can get bout 7-8 bars on the smeter to light when i transmit
and
> no hi current messages, and on  the display the current doesnt goe up so
> high on transmit.. this is bad right?  I have made contacts on 20 meters
> with good rst reports on the  low end where i have these problems.
usually
> i use the antennas at our club house or on the ship which have been
checked
> for good swr but i did make me a dipole antena for 20meters without
checking
> swr (dont have
>  one)im afraid i may have done what they call burn the finals.  Don if you
> read this please let me know what you think I may bring it by if you think
> this is a serious problem.
>
>
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