Discussion:
comtek crystal frequency
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Zoltan
2009-10-14 11:01:03 UTC
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Hi Rampsers,

I'm having 72 MHz comteks. I just wanna to know if there's a
speadsheet or similair where from I can know the frequency of the
crystals installed to the recievers. Say 31.100 Mhz crystal frequency
corresponds to freq labelled E.
Any thoughts?

Thanks

Zoltan
Mega
2009-10-14 12:06:51 UTC
Permalink
Haven't used Comtek's for a long time but if I remember rightly
A is 72.1

I did a search and found this on ebay, some crystals for sale with
frequencies noted.

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=320417647942

Hope its accurate and hope it helps you
Peter Mega
Post by Zoltan
Hi Rampsers,
I'm having 72 MHz comteks. I just wanna to know if there's a
speadsheet or similair  where from I can know the frequency of the
crystals installed to the recievers. Say 31.100 Mhz crystal frequency
corresponds to freq labelled E.
Any thoughts?
Thanks
Zoltan
massman
2009-10-14 19:01:00 UTC
Permalink
This seems to list all of the preset COMTEK frequencies...

http://www.textfiles.com/hamradio/FREQUENCIES/bugging.txt
Bill White
2009-10-17 23:57:30 UTC
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Post by Zoltan
I'm having 72 MHz comteks. I just wanna to know if there's a
speadsheet or similair where from I can know the frequency of the
crystals installed to the recievers. Say 31.100 Mhz crystal frequency
corresponds to freq labelled E.
The formula for converting crystal frequency to operating frequency (in
your case) is:

Crystal frequency multiplied by TWO, then add 10.7

i.e. 31.100 multiplied by two equals 62.2

Add 10.7 and you get 72.9 MHz

Bill White
http://microphonemagic.tv
Peter Connolly
2009-10-19 11:42:05 UTC
Permalink
Post by Bill White
Post by Zoltan
I'm having 72 MHz comteks. I just wanna to know if there's a
speadsheet or similair  where from I can know the frequency of the
crystals installed to the recievers. Say 31.100 Mhz crystal frequency
corresponds to freq labelled E.
The formula for converting crystal frequency to operating frequency (in
Crystal frequency multiplied by TWO, then add 10.7
i.e. 31.100 multiplied by two equals 62.2
Add 10.7 and you get 72.9 MHz
Bill Whitehttp://microphonemagic.tv
I have about 20 receiveres and transmitters for sale, 2 TX 72.1, 12 RX
72.1 & misc other Comtek units in various Freq. Let me know if you
need any.

Peter
***@it-biz.com.au
Bill White
2009-10-20 03:04:00 UTC
Permalink
For those who have the older crystal-locked Comtek systems
i.e. PR72 & MRC182 systems.

A comprehensive list of frequencies, and channel designators, can be
found at the below URL.


http://microphonemagic.tv/articles/3-articles/40-old-comtek-frequencies

Bill White
Sydney Australia
Zoltan
2009-10-20 08:42:57 UTC
Permalink
Post by Bill White
For those who have the older crystal-locked Comtek systems
i.e. PR72 & MRC182 systems.
A comprehensive list of frequencies, and channel designators, can be
found at the below URL.
http://microphonemagic.tv/articles/3-articles/40-old-comtek-frequencies
Bill White
Sydney Australia
Hi Guys,

Thank you very much for the info. I'm really happy with it. Special
thanks to Bill :-)))

Peter:

thanks for the offer, at the moment I'm planning to buy additional
recievers for my 72 series, the freq is E. My only problem is with
the customs, since I live in Europe. Pls drop an email to me. Thanks

Zoltan

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