The best way to determine if a problem is or is not produced by RF
Feedback is to operate with the transmitter working into a dummy load.
If the problem goes away, there is a 99% chance it is RFI.
This comment is not confined to the K3 or any other Elecraft gear, it
can be any transmitter.
IMHO, the proper place to cure RFI is in the antenna system. Try common
mode chokes on the feedline(s) - in addition to the antenna feedpoint,
they are often needed at the point of shack entry.
73,
Don W3FPR
On 9/20/2014 9:29 AM, Mike Goldstein wrote:
I've had a few responses to my earlier query re using the Heil Proset
iC with the K3, others who have had similar problems - you are not alone!
Here is my original post:
"Using the K3, has anyone else had problems with the Heil Proset
supplied by Elecraft (model iC) as to audio feedback on VOX, very
sensitive controls of VOX gain and Mic gain, etc. etc?
These problems can be masked as RFI, but adding toroids on the cable
has little effect. No other microphones seem to have these problems"
Note that the Elecraft mobile mic. also has an electret cartridge, but
I usually use PTT with it, and would not notice VOX problems.
I've wrestled with this for 6 years, and finally decided to beat it. I
had the same problems on my Kenwood TS590, with this headset.
My solution was to buy a Heil Proset 6, with the HC6 cartridge, a
cartridge with much, much lower output. In the past couple of days,
I've tested it on the K3 and my Kenwood TS590 ... works a treat, and
nooooooooo problems!
______________________________________________________________
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]
