Update:
With one-quarter of one leg of the dipole still under ice, I got a
reception report from PSKReporter on FT8 with 2 watts to Italy. That
shouldn't work, should it? Maybe the ice doesn't matter?
KD5VXH recalled a discussion in QST on this very subject, where 400W AM
melted the ice on one leg of the dipole (fed by coax), but not the other.
'
You can follow the controversy in May and July 1960 letters in QST!
david
KC1DNY
On 12/13/2020 4:36 PM, Louandzip wrote:
I haven't given this a lot of thought but:
1. Virtually none. 100W most radiated, leaving very little heating
the ice/snow along your long cold wire. The wire itself won't heat up
as it has very low resistance.
2. IDK about the KXPA100, but Tune is often done at low power, so if
100W work, Tune certainly won't.
3. Need to check the SWR, but even if good initially, may vary a lot
as ice/snow situation changes. This might test the SWR capability of
the tuner and protection of the amp, which is best left untested.
If you do try it, keep it legal: Check the freq before transmitting,
and be sure to identify. Let us know how it goes. This might be the
excuse you've needed to get that legal limit amp you've been wanting.
Lou W7HV
On Sunday, December 13, 2020, 11:40:18 AM MST, David Haines
<dhai...@bates.edu> wrote:
Before I try something crazy, like climbing up on the roof ... .
We had an ice storm. The ice pulled my wire dipole down to the roof,
but didn't break it because one mask was Schedule 30, which leaned over
nicely. It then snowed on top of the ice.
I've been able to free the feedline (ladderline) and most of the dipole,
but part of the dipole is till under the snow under a layer of ice way
up on the roof.
I'm thinking of running 100W from my KXPA100 to melt it out of there,
but before I try:
1. Is there any chance of this working?
2. Should I just transmit a TUNE through it?
3. Can I damage the KXPA100 or tuner?
Right now the coax is not connected to the KX3 and I haven't tried to
receive.
david
KC1DNY
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