--- In ham_amplifiers@..., "g0vdz" <g0vdz@...> wrote:
Dear All, I have a Yaesu FL 2100z. I have had it for about 6 months
and all though I do not use it very much it is nice for contests.
I went onto cqww and decided to enter a topband entry. When i
fired
up the liner, it would only put out a marginal signal. I.E. 25
watts
in 40 watts out.
I have lifted the lid and the RFC or anode choke looks a bit the
worst for wear. Could this be the cause of the problem. The other
bands seem reansonable. Has anyone had this problem and if so what
was
the problem
Many thanks to all Nigel G0VDZ
Nigel,
I also have a FL2100z, just got it going again after a mishap in
shipping some years back(wonderful posties, AMP a tad heavy I guess)
Anyway what sort of input Ia was the beast drawing on 160 M ? Was it
getting enuff drive, u say 25 Watts in, maybe the input Pi filter is
US or the switch contacts. If it was drawing the normal (or near
normal Ia , i.e. 300mA ish) then got to be in the Plate CCTS
somewhere. I did try to fire mine up on 160M and got some orrible
frying noises from inside. Found out that one of the sleeved heavy
wires from the plate side to the padded C's was arcing thru the
insulation to the body of the band change switch, were it was bent
around the switch body, pulled it away from that and no Frying noises
anymore. Just need a new pair of 572b's as the previous owner cooked
em ever so slightly on a qrg just a tad LF of 10 Meters Ha Ha....
Hope that the above gives your some ideas, perhaps you'll can run the
beast in a dummy load and try some more tests.
73 Derek G8ECI
