Although this may have already been observed (and most may have finished
their kits unless they bought additional for experimenting), I just
discovered that there is an 11.98135 Mhz crystal listed in Mouser (and
Digikey) with the same values and size as the 12.000 Mhz Xtal.
Has anyone tried the 22.1184 and the 11.98135 xtals together? This
appears as though it would yield an upper frequency of about 10.137.
This combined with a 5.6 or 6.8 uH inductor should increase the range
of the 38S without having to put a varicap in line with the inductor
(and would enable the 38S to use the whole bottom portion of 30m). The
the RIT might be needed more due to the wider range that the 100K
pot tunes.
I ordered the 11.98135 xtals today from Mouser. The decision I will
have will be whether to try it with one of my unbuilt kits or to tear
into the one I have working now (using the 4.7 uH L1 inductor w/ a range
of 10.100 -10.198).
Side note: The Bob Barry stability suggestions (3/24) appear v.
worthwhile. My offset varied v. badly from one end of the tuning range
to the other until I implemented the bypassing and ground strap in his
note (forwarded through Doug Hendricks).
Tnx. Don C. Faith, N9WR
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