Hi, In the meantime, I have probably made some progress.
I set up the K2 in another room in the garden for operation, and then I dismantle it again in the evening. I looked at the steps involved in dismantling and putting it away, trying to do things differently to see if the problem would occur again after turning on the K2 the next day.
In particular, I carefully folded in the tilt stand without bumpingthebottomcovertoomuch. Since there might be a connection there, I removed the bottom cover before switching on and tried to activate the distorted audio signal by tapping some places a plastic rod.
I discovered that the problem could actually be triggered by tapping the two 1/4" standoffs (Figure 6-3). One of the standoffs was slightlyloose because the #4 lock washers were missing from both screws. I have now added these.
I have to check if the audio problem occurs again when the tilt stand is folded in tighter. I also need to try triggering the problem by tapping other components in this area.
Once the distorted audio signal has been triggered, this can be corrected by changing the band several times. However, a connection with switching to the 20m band in particular has not been confirmed.
Apparently the effect is triggered by a vibration. The connection between the bumping on the two standofs and the distorted audio signal is still not clear to me. It is also not clear why the signal returns to normal after changing the band several times.
IhopethatIhaveexplainedeverythingclearly. 73, Wolfgang DL2KI -- 73 de DL2KI http://www.dl2ki.de DOK K08 (DL-QRP-AG #3247) G-QRPC #13541 AGCW # 3944 HSC #1970 GnuPG: Öffentlicher Schlüssel erzeugt am: 2012-10-27 Key-ID: 0xFB3F3B7A Algorithmus: RSA(4096 Bit) Fingerprint: 4530 9FCB 9D48 9B50 967C F81C 0EDB 78D9 FB3F 3B7A Anleitung - E-Mails verschlüsseln - Free Software Foundation https://emailselfdefense.fsf.org/de/ ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
