"Guy Atkins" wrote in
:

This morning I went through the freq display adjustment and evaluation
with much more care than the first time, when I originally discovered
the trimmer control.

Perhaps initially I didn't leave the radio on long enough for the
circuitry to warm up completely, because now I find ZERO imbalance
between LSB and USB across HF and medium wave. Probably someone with
test equipment could find something wrong, but to my ears the sound is
identical between sidebands when the filter bandwidth is the same, the
radio is tuned to the carrier, and the PBT is centered.

As far as frequency display accuracy, I now have the display spot-on
throughout the HF range, and only 20 Hz error near the bottom of medium
wave. That is, zero beat on my local on 570 kHz needs to be set to
570.02 kHz for natural speech in LSB and USB (which still sounds
"balanced between LSB and USB at 570.02). For my local on 1000 kHz, I
need to tune to 1000.01 kHz for zero beat, and on 1560 kHz the zero beat
point is right at 1560.

The radio is quite stable enough for pleasant and useful ECSS tuning of
DX after the warm-up, which is quite an accomplishment for a portable
receiver!

I now want to investigate how long it actually takes for the drift to
settle down, as I left the radio on over night before doing my more
careful adjustment and test.

BTW, just to clarify my earlier message, the frequency adjustment hole
is found in the copper cover that's beneath the left slot OF THE RIGHT
GROUP of ventilation holes on the back. It is *not* under the very far
left vent slot.

Guy Atkins


I have to take back some of the evil thoughts I had about the intelligence
level of Eton radio designers and engineers after reading your posts.
They weren't too stupid to realize the bad designs of their radios and had
the fore thought to incorporate the alignment hole through the case.

For them, that's what I call: Forward thinking!

sc