Steve -
I forgot, we also got the KEY jack moved to the side so we could use those neat little flat
plugs.!!! :-) THIS really WAS an improvement though, because a big old straight bodied plug really
interfered with the TRANSCEIVE and FUNCTION switch operation.
73, Garey - K4OAH
Glen Allen, VA
Drake 2-B, 2-C/2-NT, 4-A, 4-B, C-Line
and TR-4/C Service Supplement CDs
<www.k4oah.com>
Garey Barrell wrote:
Steve -
Not really..... Yes, the neon 'PTO in Use' lights were a nice touch, but the 'above the belt'
switch from aluminum to black lettering made all the difference in the world in being able to READ
what they said. The new MAIN TUNING knob with 'dished' skirt also made them much easier on the
eyes, especially in lighting with any glare. That's why MANY of the R-4 and R-4A receivers no
longer have the old main knob and flat skirt, but ended up with the 'new' style with the nice
bright aluminum center. LOTS of those knobs and skirts were sold when the "B" came out. Most
important of all though was the change from 4 pole crystal filters in the T-4X to the 8 pole used
in all later models. The T-4X actually doesn't meet the 'Purity of Emissions' requirements in the
FCC regulations. Both the Carrier and Opposite Sideband suppression are much poorer in the
T-4X. Obviously the T-4X is 'grandfathered' in, and if you are not driving an amplifier, most
will never notice the difference. However, IF you use an amp, and/or have a nearby ham neighbor,
you may make new friends! :-) Of course if you only operate CW, not a problem as the T-4X has
that nice, smooth T-4X(any) keying. The 'B' also saw the conversion from bipolar to FET in the
PTO for improved stability.
Other than the above, not much difference! :-)
73, Garey - K4OAH
Glen Allen, VA
Drake 2-B, 2-C/2-NT, 4-A, 4-B, C-Line
and TR-4/C Service Supplement CDs
<www.k4oah.com>
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