Don,
thanks for that information.
Here's what I have. TX appears fine. With 12.3V supply I get the
following output: 80m 3.3W; 40m 2.9W, 30m 3.8W, 20m 3W. All measured
by an Oakhills Labs QRP meter and a 50 Ohm dummy load.
The RX seems to have a problem. I have done a careful check of all
craft-boun...@mailman.qth.net] On Behalf Of djmd
Sent: Wednesday, March 18, 2009 7:42 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] KX1 - very quiet on 30m and 20m
Although it's probably not relevant to your solution, I just wanted to echo
Don's comment on headphone sensitivit
Although it's probably not relevant to your solution, I just wanted to echo
Don's comment on headphone sensitivity. I've owned a lot of electronics over
the years, and the KX1 definitely wants more sensitive headphones than any
of them. For instance, I have a pair of Delta Airlines earbuds that
ba
Bob,
OK, I finished the KX1 up to the point where I am able to give you some
numbers.
With a 50 uV input at 7040 from my XG2 signal generator, I find 0.866
volts measured across the AF Gain control (control set to maximum) with
a high impedance load at the headphone jack. If I plug in headphon
Bob,
I can't give you a measurement number right away, I do not have a
working KX1 here at the moment, but that value may be possible tomorrow
or Friday.
If you do not hear quite a loud signal with the 50 uV output from the
XG2 (or XG1 with a 20 meter crystal) - with the RF Gain at full
clock
I've just completed a KX1 build with the 80/30m option and auto atu.
It works on all bands but 30m and 20m require the volume control to be fully
clockwise and even then it's quiet. I've carried out the recommended checks and
everything appears to be fine.
Having read the previous posts on 'low
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