[Elecraft] KPA500 Hum
Don Wilhelm
w3fpr at embarqmail.com
Tue Sep 27 21:59:14 EDT 2011
Dave,
Yes, you are correct, the foam may take some time to recover, but if
loosening the bolt makes a change, then that is the problem.
I am doing well, and in fact this weekend, my antenna farm will get
higher. I have a crew coming over to put the VHF/UHF antenna on the 48
foot tower - that project has been 3 years in the making, but it will
finally happen. My first time on VHF/UHF too, so this is a new
adventure for me.
We should have a good party on Saturday. 3 guys willing to climb the
tower (myself included), and at least 4 more for the ground crew. Most
everything is now ready to go up. Finally, my Yaesu FT-847 will find
some use, and I can check in with the locals on 2 meter FM.
73,
Don W3FPR
On 9/27/2011 8:51 PM, G3TJP wrote:
>
> Don, if they have crushed the foam washers, then loosening off may not
> help if the washers cannot recover. If they can recover, it might
> take 24 hours or so. If they are beneath the transformer and the
> cells have been creased, then they will never recover. It amazes me
> how folks can be surprised that transformers hum and that that it
> takes good practise to eliminate that which is caused by the stray
> magnetic field
>
> Hope you are keeping well, buddy? No floods, famine or limitations to
> the height of your antenna farm HI!
>
> 73 and stay well. Dave G3TJP
>
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