May be the end of the channel owner. Utter failure might be a hard thing to recover from. Seeing as though on the world stage .
Perhaps people will finally see there is no true knowledge , all smoke and mirrors.
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On 2025-03-12 15:50, Jim VE7RF via groups.io wrote:
Correct. They use trial and error. They have no clue how much RF
current is flowing through any component. They just.....'pile
drive' the crap out of anything and everything...then wonder why the
tube doesn't last. Ditto with parts. They overheat and blow up, or
peak V arcs something. The last goofy one I saw on De luna's fb
page.... was where a fellow used magnet wire for the coil on the tuned
input, fine..... but he had a mile long magnet wire...going to the
cathode of the gg triode.
Mike, good detailed description. Problem is..... typ 11m op
wouldn't have a clue how to plate modulate anything.
Why mess with AM is beyond me....esp when using a linear amp in AM
mode. As I have shown before, SSB has a 12.04 db advantage over
AM.
EG: CXR is 6 kw........swings to 9 kw. Pep out is 24 kw. When
it swings from 6 - 9 kw, that's 3 kw of total sideband power...with
just 1.5 kw into each sideband. You could get 1.5 kw into one
sideband with a 8877.
Same tube, with 24 kw pep out on ssb. 24 kw / 1.5 kw = 12.04 db.
This is why linear AM is such a wasted effort.
IF I was a hardcore 11 m op....... I would put up 2-3-4 stacked
yagi's....and clean house. Then worry abt the amp.....and also deep
six AM mode.
Links:
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[1] /g/ham-amplifiers/message/41074
[2] /mt/111589618/8135091
[3] /g/ham-amplifiers/post
[4] /g/ham-amplifiers/editsub/8135091
[5] /g/ham-amplifiers/leave/12941173/8135091/773995006/xyzzy
