Tj Johnston, N4UYQ wrote:
>
> That 38 Special sure sounds good..... now what do you have for us
> Novice/Techs???
> The 40-9er is not available anymore.... any 80m,15m, or 10m QRP monobanders
> like the 38 Special available??? Mods for the 38 Special to Novice/Tech
> bands???
>
> 72/73,
> Tj Johnston, N4UYQ (Tech+) QRP-L member #1057
> formerly KA4GVW (Novice)
> Ashland, Virginia (Hanover County) FM17
> Richmond Amateur Telecommunications Society
> http://www.rats.net
The Norcal web page (based on a QRP-L posting by Marty, WB8FNH) has an
entry that discusses the fairly minor changes (a few different
capacitors and a few more windings on the same torroids) necessary
to change the 38S to a 48S with a base frequency of about 7.04
(the difference between 16.257 Mhz and 9.216 xtals). I
have been looking at other possibilities and have come
up with the following: Using two 15 Mhz xtals in place of the 12 Mhz
from the kit (w/ the original 22.1184 Mhz xtal) would yield the bottom
end of the novice 40m band (diff. of 7.1184 Mhz). Using a 21.47727
and two 14.31818 xtals would yield 7.159 Mhz. Refer to page 39
of current Mouser catalogue (in some cases will need to use the
smaller (diff. res.) HC-49/US xtals for the local osc. but I
don't know if this is a problem. The crystals should be of the
"series" variety. I plan to give it a try but it may be
a while (bought an extra kit for experimenting but have a rainbow
tuner, LGD tuner and Dan's 80m ssb kit on order). I myself am a
beginner at this stuff (I'm a ChE, not an EE or particularly
knowledgable in electronics - I just like to build stuff) so perhaps
some of the wizards on this list may be able comment if I have made any
major blunders regarding the above.
Let us know how it works out: Be the first on the QRP-L block to
have a novice band 48S.
73 (es 72) de N9WR, Don C. Faith
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