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[IRCA] Grundig G8 AM Band Sensitivity-- QC Record
Hello All,
With the Ultralight radio enthusiast group purchasing the new Tecsun
PL-300WT and Grundig G8 DSP-enhanced portables in droves, more information has
been collected about Tecsun's quality control in optimizing AM sensitivity
in the radios.
Perhaps the most interesting data concerns the apparent difference in
typical out-of-the-box AM sensitivity in the two models. This information is
based on six alignments performed here (four G8's and two PL-300WT's), two
by Steve Ratzlaff (both PL-300WT's) and one by Brian Roland (one G8).
Of the five G8 alignments, four of the units had good AM performance
out-of-the-box. One unit had perfectly optimized AM sensitivity as delivered
from the factory, while three gained a minor improvement when the loopstick
coil was shifted slightly to the right. The remaining unit required a coil
shift to the left, partially off the bar.
Of the four PL-300WT alignments, two of the units had good AM performance
out-of-the-box. Both of those units gained a minor improvement in
sensitivity when the coils were shifted slightly to the right. One of the other
units required a major coil shift to the right (.5 inch from the original
position), while the other unit required a major coil shift to the left,
partially off the bar.
There is now strong evidence that typical G8 loopstick coils have much
less wax securing them to the ferrite bars than typical PL-300WT coils, a fact
which results in easier AM alignments in the G8 models. Apparently a
single Chinese factory has been designated to manufacture the G8, and this
factory seems to be stingy with loopstick wax-- a positive thing for tinkerers
hoping to align their units for maximum AM sensitivity.
Of course, with Amazon's $50 delivered price for the G8, there is no longer
any logical reason to purchase the electrically identical PL-300WT from
China, and pay the $24 shipping charge. But for those still considering a
purchase of the Grundig G8, the above QC information may motivate a few more
to take the plunge.
73, Gary DeBock (in Puyallup, WA)
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