[Elecraft] Elecraft] K3 K144XV spurious signal on 144,414.1

[Sverre Holm (LA3ZA)]

I have now checked with a local ham here who is very active on 2m DX-ing and
who uses the K3.

He says he can hear the internally generated 2m signals from the K3 if he
places a short antenna on top of the K3 connected to his IC-706 on 2m. He
hears a strong signal at 144.418 MHz as well as many weak and a few strong
signals between 144 and 144.5 MHz. 

Interestingly he also says that if he uses an external antenna on either his
IC-706 or his DB6NT 2m transverter which is in an enclosure and placed
directly on top of the K3 he will not hear any of them.

With undesired signals like these, one can either look for the source and
try to quiet it, or one can shield the receiver to prevent it from hearing
them. The latter actually seems to work in this case.

But can the K144XV either be better shielded in its internal mounting, or
perhaps be moved external to the K3 in a separate shielded enclosure?




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Sverre, LA3ZA

K2 #2198, K3 #3391,
LA3ZA Blog: http://la3za.blogspot.com,
LA3ZA Unofficial Guide to K2 modifications: http://la3za.blogspot.com/p/la3za-unofficial-guide-to-elecraft-k2.html
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