Gary -
The off-resonance current can exceed 400 mA, which makes it a little difficult to see the dip. Most
T-4Xs will load to better than 240W and higher on CW.
The meters are the same, only the scale was changed. The Cal resistor, R38,
was changed to compensate.
Since it's best to tune for maximum output and then back off the GAIN for the desired power, that
extra overhead was needed.
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>
Gary Winblad wrote:
I saw a post not too long ago that said the T-4X meter changed during
production from 400MA to 500MA. I finally had time to look at this, and
sure enough my old early t-4X has the 400MA meter.
Not that it matters, I am just curious, what is the details on this change?
My manual says to tune up to 320MA and my hand written notes says
this is 208Watts.. Why do the later t-4Xs need a 500MA meter?
73, TIA,
Gary
WB6OGD
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