yaesu mods page 73s
W7AGR
proceed at your own risk
my yaesu ft101 modified the cool blue and purple ligth cool blue is much better than purple yea
baby......
This page has Modifications for Yaesu radio's
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yaesu ft 101 mods
Date: 11 Feb 90
From: w7agr.andres@gmail.com
Subject: FT101E mods so you can use USA final tubes
copied from packet:
Final Mods - Yaesu FT 101E
Here's an old modification that's been around for a few years. I had
occasion to use it recently myself, so it may be of value to someone
else Anyway, it works.
73s andres de w7agr
REPLACING FINALS IN FT101E TRANSCEIVERS
---------------------------------------
There will come a time when the finals in your FT101E will need
replacing. These transceivers were originally equipped with 6JS6C
tubes manufactured by NEC. This tube's properties are slightly
different from the 6JS6C tubes available today from American tube
manufacturers. By the way, don't bother looking for tubes made by
NEC. They got out of the business several years ago.
In order to use the "American" variety 6JS6's, a simple modification
to the neutralization circuit must be made to the final section of the
transceiver.
The modification consists of replacing the fixed value 100 pf 1000 VDC
mica capacitor with a 10 pf 1000 VDC mica capacitor. This capacitor,
C125, is in series with the 10 pf variable neutralizing capacitor off
of the plate circuit.
If this modification has not already been completed on your rig, be
sure to use a mica or silver mica of at least 1000 VDC. Do not
substitute a different type, because the heat in the final compartment
will change the value, and your tubes will fail prematurely. Also, be
very careful to keep all leads short and in exactly the same
orientation as the original capacitor.
Before reneutralizing, open the variable neutralizing capacitor all the
way to minimum engagement and follow the neutralizing instructions in
the manual. While dipping the plate, remember to adjust the
neutralizing capacitor for equal value meter reading peaks (IC
position) on both sides of the dip when tuning the "Plate" control.
Note: proceed at your own risk not responsible for damage to you rig
73s de w7agr good luck
by some one on the web don't know who did it but i give it a credit for the info
by w7agr
These mods work on FT-101. 73s and I hope these are a help to many.
Transmit Modifications
PB-1315:
PB-1184A:
Receive Modifications
First and foremost, the narrow SSB IF filter makes signals through the receiver sound very muffled. Fortunately, there is an aftermarket 6 kHz wide AM filter available for the FT-101/B/E/F series from:
International Radio and Computer, Inc.
3804 South U.S. 1 Fort Pierce, FL 34982
Phone: (407) 489-0956, FAX: (407) 464-6386
The filter is the Fox-Tango #2011. Price as of January 1993 is $75.00 plus shipping. The filter is installed in place of the CW filter, with some minor circuit changes so that the 6kHz filter is in circuit when the mode switch is placed in the AM position. The SSB filter remains in the FT-101 and is used in the SSB and CW modes.
** If you buy a used filter without the instructions, refer to Yaesu FT-101 series Maintenance Service Manual (Yaesu part # 50900) available from Yaesu for installation instructions.
PB-1315: