you can see pictures of most of the mods, based on his article "QSK
for the TL-922 and SB-220 With Circuit Improvements for the TL-922".
I use YAESU FT-1000MP to drive modified TL-922. No problems so far.
My reason for taking TL-922 apart in order to modify it was the
smell from filament transformer. It definitely was "melting".
Well, not anymore. It's very pleasant to use this nice amplifier
now. Every time I tune it, I have this good feeling that it
operates as it should have from day one.
It took me a couple of weekends to do it all. Those HAMs who plan
to modify TL-922 but don't know where to start, should be able to
do it a lot quicker using my pictures. Feel free to contact me if
you have any questions about it.
Here is what I needed to buy before I started (details on www.somis.org):
VHF-Q parasitic suppressor retrofit kit
switching parts-kit for QSK mod
Relay KILOVAC HC-1
In addition, you may want ot find these 3 useful manuals.
If you google, you will find all 3 of them.
TL-922 operator's guide
2. TL-922 Service Manual
3. TL-922 QST Review
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Let's get started. List of modifications is below, each line is
a link to a page with pictures of it.
1. Low VHF-Q supperssors
4. Filament voltage
6. Cathode circuit
7. Anode and grid circuit
8. Plate capacitor
mods can be found here: