On Jan 8, 2005, at 10:24 AM, Ed Palmer wrote:
I still can't get this silly K2 to work on 20 and 30 meters. It
appears to work well on all the other bands however.
Hi Ed,
Having built (and designed) many kits, I can empathize with your
frustration at not being able to get part of it to work correctly.
Please don't take a hammer to it quite yet -- it's really a great rig
;) The fact that it's working on the other bands means you're 99%
there, and you really have successfully completed the kit.
It sounds like you've tried all of the things I would try, initially,
but here are some more recommendations:
- The transmit mode signal-tracing procedure in Appendix E of the
manual is very easy, and very effective
at locating where the signal is disappearing. An easy to build RF
probe is supplied with the kit.
Chances are you can find out exactly where the signal is getting
lost -- probably the band-pass or
low-pass filters, but without tracing, you can't be sure.
- If you build a simple test oscillator like that shown in Appendix
E, you can inject a signal at the antenna
jack, and trace it using the RF probe. To do this, switch to 20 or
30 meters, shut off the rig, then
trace backwards with the RF probe starting at the antenna jack.
My guess is that you have a short on the RF board in the 20/30-meter
lowpass filter. Sometimes these shorts can be hard to find.
If all else fails, please send the rig to Gary, our customer support
engineer. He's seen just about everything, and I'm sure he can quickly
fix it for you. If it turns out that the RF board was defective, the
repair will be entirely on us.
73,
Wayne, N6KR
(principle designer of the K2)
---
http://www.elecraft.com
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