[Elecraft] KX1 low output modification candidate.

[Don Wilhelm]

Bart,

Yes, do the power mod, it improves the drive levels.
Also look carefully at the Low Pass Filter board if you still have low
output levels when you test it with a 14 volt supply.  With 14 volts, I find
4 watts or more on all bands except 20 is not unusual and 20 meters usually
develops 3.3 to 3.5 watts.

73,
Don W3FPR


> -----Original Message-----
>
> My KX1 'suffers' from low output. On internal batteries (8.5 V, current
> drain not measured yet), I get into a 50 Ohm dummyload:
> 1 W @ 80m
> 0.7 W @ 40 m
> 1 W @ 30 m
> 0.7 W @ 20 m
>
> I probably should measure this again at 14DC input and also note the
> current drain, but I'm sitting here wondering about the effects
> of the 'KX1
> Application note/Power output modification' that came with the kit. From
> the figures above I'd say my KX1 is a good candidate for the mod, but I'm
> curious what the effect on current drain will be.... Will current
> drain on
> transmit also double with installation of the mod? Wouldn't that
> constitute
> a considerable effect on battery life, even when one is not transmitting
> all the time...
> Seems like a high price to pay for what, half an S-point in
> signal strength.
>
> What do you guys think/already found out?
>
> Bart de PA3GYU
>
>