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dave0123
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Joined: 02 Jan 2011
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Post FM Transmitter Link Reply with quote
Hi There,

I have just signed up to the forum and was wondering if someone could help me.

I was wondering with setting up a studio to transmitter link that you could use a VFO transmitter (low power example 5 watts) i idea was to tune the trimmer capacitor to the end of the dial 107.9 108.0 if you kept tuning very slightly would this go above 108? to say 108.2 or 108.5

I understand you would have to get a radio receiver which is no problem but would the above idea work?
Sun Jan 02, 2011 1:10 am View user's profile Send private message
pcs
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Post Reply with quote
Such a transmitter is not stable enough, frequency could easily change.

Just above 108MHz is air traffic, this is one place where you really don't want to end up.

And a regular receiver is very likely to leak some of the stereo pilot which
could produce a beat tone with the transmitter's own stereo pilot.
Nasty.

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Marko - PCS Electronics
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Turn your PC into a FM radio station!
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Sun Jan 02, 2011 1:20 pm View user's profile Send private message Visit poster's website
dave0123
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Post Reply with quote
What about using a PLL then? at the other end of the band just below 87.5

Although you said the VFO is not stable and the other problems could it actully be tuned above 108 though?
Sun Jan 02, 2011 2:04 pm View user's profile Send private message
pcs
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Post Reply with quote
Why bother when these are so cheap?

http://www.pcs-electronics.com/58ghz-lowcost-microwave-audiovideo-link-system-p-1775.html

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Best regards,
Marko - PCS Electronics
--------------------------------------------------------
Turn your PC into a FM radio station!
http://www.pcs-electronics.com
fax +386 4 2316 128
Sun Jan 02, 2011 4:24 pm View user's profile Send private message Visit poster's website
dave0123
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Post Reply with quote
because am just wondering if it can be done! out of intrest more than anything or as a backup
Sun Jan 02, 2011 6:20 pm View user's profile Send private message
pcs
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Post Reply with quote
It can be done, of course, but whether it makes sense and
what the performance will be is a big question.

I do not recommend it.

_________________
Best regards,
Marko - PCS Electronics
--------------------------------------------------------
Turn your PC into a FM radio station!
http://www.pcs-electronics.com
fax +386 4 2316 128
Sun Jan 02, 2011 6:26 pm View user's profile Send private message Visit poster's website
dave0123
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Post Reply with quote
I just did not no if you could tune down lower than the radio band with a VFO or PLL.


The above link to your microwave links what power do these put out? my transmitter usally is around 5-7 miles away
Sun Jan 02, 2011 6:30 pm View user's profile Send private message
pcs
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Post Reply with quote
MAX PRO 3000+ can be tuned down to 76MHz. And it can be even modified for 50MHz band.

_________________
Best regards,
Marko - PCS Electronics
--------------------------------------------------------
Turn your PC into a FM radio station!
http://www.pcs-electronics.com
fax +386 4 2316 128
Mon Jan 03, 2011 12:59 am View user's profile Send private message Visit poster's website
dave0123
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Post Reply with quote
Thats intresting.

So could easily be used for linking - do you sell any receivers at 50mhz or around the 76 mhz
Mon Jan 03, 2011 11:45 am View user's profile Send private message
pcs
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Post Reply with quote
Not at the moment.

_________________
Best regards,
Marko - PCS Electronics
--------------------------------------------------------
Turn your PC into a FM radio station!
http://www.pcs-electronics.com
fax +386 4 2316 128
Tue Jan 04, 2011 3:17 pm View user's profile Send private message Visit poster's website
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