[Elecraft] swr

[Jack Brindle]

Did you remember to retighten the screws on the PA transistors as 
required by the documentation?

On Nov 22, 2003, at 7:31 AM, syd smith wrote:

> I have had K2/100 #3324 on the air for about 6 months when the swr 
> went out of sight and of course it would trip out of transmit.  After 
> running around in tight circles looking into the antenna, I hooked the 
> K2 up to the dummy load and read an swr of greater than 2.  So I went 
> back to the SWR Bridge Null adjustment procedure with the following 
> resuts:
> 1.  C1 has little if any effect.  Measuring voltage at U5 pin 1 its 
> about 17 mv and varies about a mv with C1 tweaks.
> 2. I can achieve 1:1 if I tweak R27 to about the end of its range 
> rather than the mid range where it belongs.
> 3.  But at any power  greater than 1 watt the K2 trips out of TUNE 
> after about 3 seconds, displays ELECRAFT for a second, and then the 
> normal freq. display.
> 4.  The swr varies with power i.e. if adjusted for 1:1 at less than a 
> watt, it rises to 2:0 at 5 watts.

-Jack Brindle, WA4FIB
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