Scott,

I've used this modules for telemetry, they are very good. Use them also for audio, setting a voltage offset at the module input. You can get good
audio quality at the other end, especially if you use the 433.93 modules and use you HAM radio to receive it. Wonderful.

But i do not want this modules. I do want real VHF FM and UHF FM HAM band syntethized modules. I've been looking for them in Europe, but
found nothing here. Only found HAMTRONICS in the USA.

Do you have any idea where i can find them here in Europe ??

Thanks
Sena





>
> I've used the Lynx modules with good success (433 and 915 Mhz).  Also, RF
> Monolithics has some nice small single chip solutions for both a
> transmitter and receiver.  I've lost track of this thread, and not sure of
> your range requirements.  These two solutions are typically about 0dBm
> output... and only will get about 300' of range or so.  I did get close to
> 1000' at 915Mhz, but that was open line of sight and the BER was getting
> intolerable.  Of course, these products are typically 50 ohm output.  So it
> does help to design a matching network to line up with your antenna.  I was
> using quaterwave monopoles on ground plane.. about 75ohm impedance.  A
> simple LC section did the impedance transformation.  Doing this added 25%
> to the range.
>
> Also.. since these are 50ohm parts, its very easy to use a MMIC amplifier
> to get added output power.
>
> Scott F. Touchton
> 1550 Engineering Manager
> JDS Uniphase
>
>
>
>                     Chris Carr
>                     <nyed@BTINTERN        To:     PICLIST@MITVMA.MIT.EDU
>                     ET.COM>               cc:
>                     Sent by: pic          Subject:     Re: [EE]: VHF and UHF mini modules
>                     microcontrolle
>                     r discussion
>                     list
>                     <PICLIST@MITVM
>                     A.MIT.EDU>
>
>
>                     08/01/01 08:22
>                     AM
>                     Please respond
>                     to pic
>                     microcontrolle
>                     r discussion
>                     list
>
>
>
>
>
>
> > Maxon SR-214 is a complete handheld transceiver operating tin the 70cm
> band
> > 10mW output runs off 4 AA batteries. Ideal as the basis for a higher
> powered
> > unit.
> >
> > Cost # 29.95 UK. Available from ourselves or Waters & Stanton ( as you
> > appear to be in Edinburgh JC, 20 Woodside Way, Glenrothes, Fife KY7 5DF
> > 01592 756962
> >
> > Otherwise Vectronics have kits to build FM Receivers for 2, 6 and 10
> metre
> > bands #35.95 and a 5 watt 2 metre transmitter at #99.95
> >
> > Then there are the Ramsey and Ten-Tec Kits it all depends on what you
> want
> > to do.
> >
> > Regards
> >
> > Chris Carr
> >
> >
>
>
> Thanks for your answer.
> I am looking for small synthetized modules that can transmit in VHF or UHF.
> I do not need tranceivers or a normal LPD already industrial friendly
> boxed radio. A PCB (printed circuit board) module is enough for me. Do not
> need pretty boxes :-).
> The final system is going to be a speacial kind of Beacon for RDF.
> Thanks
>
> Sena
>
> As a quick and easy to implement solution you will have difficulty beating
> the SR-214. Just key the transmitter and forget about the receiver. Use a
> PIC to emulate keystrokes. 10mW will get you around a mile with the
> attached
> antenna.
>
> Otherwise you are going to have to look at building designs from a
> handbook.
>
> ARRL UHF/Microwave Experimenters Manual
> ARRL UHF/Microwave Projects Manual Volumes 1 and 2
>
> are a good starting point and should be available at the University Library
> otherwise they can be purchased from the RSGB
>
> VHF Communications also supply boards, partial and full kits for the
> projects published in their magazine.
>
> Regards
>
> Chris Carr
>
> Please respond via the list and not direct, other people may want to
> contribute to the thread.
>
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>
>
>


*********************************************************
Antonio Sergio Sena     CT2GPW
asena@bigfoot.com

BEng Electrical & Electronic Engineering
Heriot-Watt University - Edinburgh

Homepage: www.qsl.net/ct2gpw
*********************************************************

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