E100 Alignment Quirks


Gary DeBock
 

Hello Guys,

After receiving two more Eton E100's from Durham Radio via eBay
today (at $49 plus shipping), they were immediately tested and
aligned.
First of all, Eton's design for this radio has a significant
gaffe, which leads to reduced AM-band sensitivity. The SW antenna
folds down in a position very close and parallel to the AM loopstick,
reducing the AM sensitivity greatly whenever the SW antenna is not in
a vertical position. For serious AM DXing, make sure the SW antenna
is vertical, and you will notice a significant gain in sensitivity.
Of the two units aligned today, one required cutting of the
right plastic bracket to peak the loopstick coil on a 600 kHz signal
(the second time in five E100 alignments this was necessary), and the
other unit had a somewhat mangled loopstick, with fixed gaps between
the coil windings. This unit never did attain the low-band
sensitivity of the other units, and if you have a similar unit, your
only recourse may be to replace the loopstick (maybe with a 20"
monster?)
The high-band alignment (on a 1400 kHz signal) rarely increases
high-band sensitivity on a factory unit, but the low-band alignment
(moving the coil along the loopstick to peak a 600 kHz signal) ALWAYS
has had a major effect on sensitivity here (in five out of five
alignments). For those intimidated by major disassembly of the unit
to gain access to the 1400 kHz trimming capacitor, performing the low-
band alignment only should provide the greatest benefit in increased
sensitivity.
The E100 has an unfortunate image reception issue, which
detracts from its otherwise stellar urban-RF performance. With the
exception of this problem, the E100 has a very well-behaved receiver,
which should handle the extreme RF levels of a huge loopstick very
well. Its selectivity and high-band sensitivity are unsurpassed
among the Ultralight radios, and its many features make it a true
bargain at the $49 Durham Radio price.

73, Gary

Join main@UltralightDX.groups.io to automatically receive all group messages.