xtals

B

Bob Monsen

Guest
I'm looking for xtals on the 72 MHz RC band. They seem expensive from
the hobby sites. Does anybody know of a better source? In particular,
I'm looking for a few on channel 24, which is 72.27 MHz.

Thanks

--
Regards,
Bob Monsen

If a little knowledge is dangerous, where is the man who has
so much as to be out of danger?
Thomas Henry Huxley, 1877
 
"Bob Monsen" <rcsurname@comcast.net> wrote in message
news:UYWdnaXWq-svlUHfRVn-rQ@comcast.com...
I'm looking for xtals on the 72 MHz RC band. They seem expensive from
the hobby sites. Does anybody know of a better source? In particular,
I'm looking for a few on channel 24, which is 72.27 MHz.

Thanks

--
Regards,
Bob Monsen
Click to expand...
The FCc stole much of the band for some other service. Used to be RC
xmtrs didn't need xtals. http://www.lagmonster.org/docs/allochrt.pdf
and click on 30-300MHz and scroll over a bit. (.PDF)
 
"Watson A.Name - \"Watt Sun, the Dark Remover\"" (NOSPAM@dslextreme.com) writes:
"Bob Monsen" <rcsurname@comcast.net> wrote in message
news:UYWdnaXWq-svlUHfRVn-rQ@comcast.com...
I'm looking for xtals on the 72 MHz RC band. They seem expensive from
the hobby sites. Does anybody know of a better source? In particular,
I'm looking for a few on channel 24, which is 72.27 MHz.

Thanks

--
Regards,
Bob Monsen


The FCc stole much of the band for some other service. Used to be RC
xmtrs didn't need xtals. http://www.lagmonster.org/docs/allochrt.pdf
and click on 30-300MHz and scroll over a bit. (.PDF)


The rule for crystals may be the case (I have no idea), but I can't
Click to expand...
see someone making one of those without a crystal. You don't want
it drifting out of the passband at a crucial moment, you put it
in all kinds of environment where an LC circuit may drift more than
usual, and you want it all in a small package that isn't the best thing
for a nice stable LC oscillator.

I suspect few did not use crystals, after a certain era (which may
predate the allocation of the 72MHz RC band).

Michael
 
Watson A.Name - "Watt Sun, the Dark Remover" wrote:
"Bob Monsen" <rcsurname@comcast.net> wrote in message
news:UYWdnaXWq-svlUHfRVn-rQ@comcast.com...

I'm looking for xtals on the 72 MHz RC band. They seem expensive from
the hobby sites. Does anybody know of a better source? In particular,
I'm looking for a few on channel 24, which is 72.27 MHz.

Thanks

--
Regards,
Bob Monsen



The FCc stole much of the band for some other service. Used to be RC
xmtrs didn't need xtals. http://www.lagmonster.org/docs/allochrt.pdf
and click on 30-300MHz and scroll over a bit. (.PDF)
Click to expand...
rc channels 11-60 are area are 20kHz apart, starting at 72.01 MHz.

http://rcvehicles.about.com/cs/frequencies/p/airfreqUS.htm

AFIK, all RC transmitters and receivers use crystals. The FCC probably
doesn't want RC transmitters broadcasting random PCM into TV channel 4,
interrupting those soap operas.

--
Regards,
Bob Monsen

If a little knowledge is dangerous, where is the man who has
so much as to be out of danger?
Thomas Henry Huxley, 1877
 
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