?
I have worked on numerous 2100Z amps including some
converted to 6M and have had not needed any special mods other than to the bias
supply for Svetlana tubes.
?
I have looked at his mostly off the wall mods for
the SB-200 as real Hammy Hambone technology.
?
Carl
----- Original Message -----
Sent: Saturday, August 31, 2019 6:44
AM
Subject: Re: [ham_amplifiers] FL-2100Z
Mods
?
Alek, I¡¯d?check and see what Tom W8JI recommends at his web page for
those amps. ?I¡¯d also consider if any of the rest of the mods are a good
idea as well. ?I know some are ok but some are also questionable.
?Lou
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?
A local ham dropped in a Yaesu FL-2100Z amp tp me and said that he would
like all the PA0FRI mods done to it.
See http://www.pa0fri.com/
This is
no big problem, as most of the mods are common sense and they
are what one would normally do to an amp.
However, there is one mod that strikes me as odd.
He suggests cutting the grounding wires on VC1,
the plate tune
capacitor, and running a thick wire or coax
from the cold side of VC1 to
a ground point at the base of
one of the 572B sockets.
This seems very odd to
me. I don't see how this would enhance stability,
having that
grounding wire running all that way.
Every amp
I have seen or built, has the cold end of the capacitor bonded
to the nearest point on the chassis.
Should one be doing this mod? My feeling is that it should be
left alone.
Opinions appreciated.
Thanks, Alek.
VK6APK
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