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Author Topic: FL2100B Plate Current Meter Shunt  (Read 1524 times)
WA3MJY
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Posts: 4




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« on: June 16, 2015, 03:53:33 AM »

Does anyone know the value of the meter shunt Yaesu used in the FL2100B Amplifier? Recently I had one of the 572B tubes in my amplifier flash over and it fried the shunt and literally blew the plastic cover off the plate current meter. I know that they used something similar in the FT101b, which I have. I had a spare which measured around 1 Ohm. The shunt in the FL2100b has fewer turns of wire. I was able to re-solder the wire which opened up and the shunt measured around .6 ohms, but since it was overheated, I am not certain the reading is accurate.

I understand this amplifier is very similar in design to the SB200. The shunt used there is 1 Ohm.

Since Yaesu is a very reputable manufacturer, it baffles me that they would fail to list the value of this shunt in the parts list. Oh, did I fail to mention that they do not give the value in the FT101b parts list either.

73’s
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