The bottom line was that this was not documented. One would need to insert the new??layout of the switch onto the latest T-4X schematic. It would probably be simpler to take the B schematic and redo the PTO as the older?bipolar transistor circuit.?
I can remember writing ECO¡¯s back in the day and changing the vellum master schematics, which it appears is how Drake also did changes.?
The filters, although different, looked the same on either schematic.?
73,
Steve Wedge, W1ES/4
Time flies like an arrow. Fruit flies like a banana.
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On Wed, Mar 15, 2023 at 00:33, wb6ogd <
garywinblad@...> wrote:
Very interesting Steve.
I happen to have 3 T-4X's here.? Each one has a different mode switch!
They seem to be from 3 different production runs.
73,
Gary
WB6OGD
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