Re: xtals
- From: et472@xxxxxxxxxxxxxxxxxxx (Michael Black)
- Date: 19 Jul 2005 15:14:04 GMT
"Watson A.Name - \"Watt Sun, the Dark Remover\"" (NOSPAM@xxxxxxxxxxxxxx) writes:
> "Bob Monsen" <rcsurname@xxxxxxxxxxx> wrote in message
> news:UYWdnaXWq-svlUHfRVn-rQ@xxxxxxxxxxxxxx
>> 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
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
.
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