These transceivers had been originally equipped with 6JS i90006C tubes produced by NEC.This pipes properties are usually slightly different from the 6JS i90006C tubes available nowadays from United states tube producers.In purchase to use the American variety 6JS6s, a easy modification to the neutralization signal must be made to the last section of the transceiver.The changes is made up of changing the fixed value 100 pf 1000 VDC mica capacitor with a 10 pf 1000 VDC mica capacitor.
Yaesu Ft 847 Mods Series With TheThis capacitor, M125, is certainly in series with the 10 pf adjustable neutralizing capacitor óff of the plate circuit. Do not really replace a different type, because the high temperature in the final area will modify the value, and your pipes will fall short prematurely. Also, end up being very cautious to keep all network marketing leads short and in specifically the exact same alignment as the unique capacitor. While sinking the plate, keep in mind to adjust the neutralizing capacitor for identical value meter reading peaks (IC place) on both edges of the drop when tuning the Plate control. Luckily, there is certainly an aftermarket 6 kHz wide AM filter available for the Feet-101BEF series. Yaesu Ft 847 Mods Plus Shipping AndPrice as of Jan 1993 is certainly 75.00 plus shipping and delivery. The filter is set up in location of the CW filtration system, with some minimal circuit modifications therefore that the 6kHz filtration system is. The SSB filtration system continues to be in the FT-101 and will be used in the SSB and CW settings.
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