Hi This is JL1KRA
kd7s> > In the receive mode, I'm hearing a constant
kd7s> > hetrodyne. I first thought it was some type of
kd7s> > foreign broadcast, but it's still there without
kd7s> > an antenna! duhh! The 38s receiver seems to be
kd7s> > hearing the 12mHz oscillator, because the freq
kd7s> > of the hetrodyne changes if I touch stuff around
kd7s> > it. BTW, it's not really loud, just enough to
kd7s> > bug you,,, kinda like a mosquito!
kd7s>
kd7s> I've been hearing the same thing so I tuned my Icom IC-728 to 12.000 mHz
kd7s> and heard a very strong carrier (with the 38 Special turned off, of
kd7s> course) so I assumed it was just another source of r.f.i. getting into
kd7s> the 38 Special i.f. It comes and goes depending upon propagation. When
kd7s> it's strong, the band is open. Now I'm going to have to check it out
kd7s> with the antenna disconnected from the 38S. Does anybody else hear a
kd7s> very strong carrier on 12.0 mHz?
I completed my NorCal38S last weekend with correct crystal which
Doug send me very quickly. When there is strong 12.000MHz broadcast station,
my NC38S has IF through reception too.But it is not serious.
It works very fine.
Rather serious issue is tuning range. My NC38S is able to tune 10100-10124
without RIT mod. I can hear many DX station around 10105 but they were
unreachable with 100mW. IRF510 is not popular FET here and I could not
find even in AKIHABARA,the huge erectric town in Tokyo.
Thus I would like to join Japanese domestic QSOs they carry out between
10130-10140 due to strong RTTY station around 10120. But they are
completely out of my NC38S range. I will try tune my VXO frequency but
reach 10140 may be impossible. Fundamental crystal 22118.4 + 20Kz is very
expensive if they are custom ordered.
I think Ori's smart combination of an economic 22118.4 mass production
crystal and a 12MHz IF are may be origin of NC38S.
I just started subscribe the QRP-L. If similar article exist sorry for this.
Thanks to all NorCal people and especially Doug Hendricks distributing all parts.
Junichi Nakajima
nakaji@crl.go.jp
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