rf modulator, what about transmitter?

[Bill Kearney]

What's available for actually transmitting an RF channel 3 signal, say,
about 10 feet?

As in, push a signal from belowdecks on a boat up to a portable television.
That is, to a TV that's got nothing other than it's regular RF tuner. No
video, s-video or even a female F-connectors. It doesn't have to be
specifically channel 3 of course, but any other channel that a regular TV
might be able to pick up.

Anybody make such a thing as a ready-made product? (not a kit)

They make such things for FM, what about TV?

Thanks,
-Bill Kearney

[none]

Lots of information on google...

Most of the transmitters seem to be kits until you get up to professional
grade units (probably some FCC regulations).

http://www.ramseyelectronics.com/cgi-bin/commerce.exe?preadd=action&key=TV6C

http://www.apogeekits.com/tv_transmitter.htm

http://www.northcountryradio.com/index.htm#anc2

etc.


"Bill Kearney" <wkearney99@hotmail.com> wrote in message
news:EM2dnZV9JYLwfrjZRVn-qw@speakeasy.net...
> What's available for actually transmitting an RF channel 3 signal, say,
> about 10 feet?
>
> As in, push a signal from belowdecks on a boat up to a portable
television.
> That is, to a TV that's got nothing other than it's regular RF tuner. No
> video, s-video or even a female F-connectors. It doesn't have to be
> specifically channel 3 of course, but any other channel that a regular TV
> might be able to pick up.
>
> Anybody make such a thing as a ready-made product? (not a kit)
>
> They make such things for FM, what about TV?
>
> Thanks,
> -Bill Kearney
>



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[BruceR]

ebay my friend! For 35 bucks you're in business sending to UHF
frequencies (Chnl 14-51). All TV's since the 60's have UHF tuners so you
should be good to go.

http://cgi.ebay.com/Wireless-UHF-Audio-Video-Transmitter-Sender-4-Cable-TV_W0QQitemZ9703542694QQcategoryZ39803QQrdZ1QQcmdZ ViewItem


> What's available for actually transmitting an RF channel 3 signal,
> say, about 10 feet?
>
> As in, push a signal from belowdecks on a boat up to a portable
> television. That is, to a TV that's got nothing other than it's
> regular RF tuner. No video, s-video or even a female F-connectors.
> It doesn't have to be specifically channel 3 of course, but any other
> channel that a regular TV might be able to pick up.
>
> Anybody make such a thing as a ready-made product? (not a kit)
>
> They make such things for FM, what about TV?
>
> Thanks,
> -Bill Kearney

[Bill Kearney]

"BruceR" <br@NOhawaiiSPAM.com> wrote in message
news:SOmVf.14580$%d.7354@tornado.socal.rr.com...
> ebay my friend! For 35 bucks you're in business sending to UHF
> frequencies (Chnl 14-51). All TV's since the 60's have UHF tuners so you
> should be good to go.

How's the picture quality? Decent enough to compare to a regular channel 3
RF output from a source device?

If so that looks like just the ticket.

-Bill

[B Fuhrmann]

You should be able to find them locally in most cities.
Look at Radio Shack, Best Buy, or other stores that carry AV equipment.

www.radioshack.com/product/index.jsp?productId=2103095
$30 ready made, outputs on channel 3.

/www.radioshack.com/product/index.jsp?productId=2103585
$3 would need some hacking to change plug and add power.

http://www.bestbuy.com/site/olspage.jsp?skuId=5806345&productCategoryId=pcmcat50000050019&type=product&tab=1&id=1067388827858
$20

http://www.walmart.com/catalog/product.do?product_id=2181628
$24

http://www.target.com/gp/detail.html/sr=2-2/qid=1143390335/ref=sr_2_2/602-7024894-7671837?%5Fencoding=UTF8&asin=B00008XKYS
$20 - looks like it might have a DC power input

10 feet should be nothing for this type of device and the image quality is probably better than the camera (assuming a low cost camera instead of a camcorder quality one).

A big question is power source. Ones designed for home use will typically be 120VAC. FM modulators for cars (run on 12 VDC) are very common but the Car AV people assume that people will have video displays with direct video input.

You can probably convert any of the 120 volt units to DC by going inside and finding the AC to DC conversion in it.
The game converter will be running on DC from the game console that is in the plug with the video. You would need to discover the voltage and wire connections.

If you can find a home oriented unit with a wall transformer, you have an easier job since it is probably marked for voltage needed and the connection is obvious.


Bill Fuhrmann

"Bill Kearney" <wkearney99@hotmail.com> wrote in message news:EM2dnZV9JYLwfrjZRVn-qw@speakeasy.net...
> What's available for actually transmitting an RF channel 3 signal, say,
> about 10 feet?
>
> As in, push a signal from belowdecks on a boat up to a portable television.
> That is, to a TV that's got nothing other than it's regular RF tuner. No
> video, s-video or even a female F-connectors. It doesn't have to be
> specifically channel 3 of course, but any other channel that a regular TV
> might be able to pick up.
>
> Anybody make such a thing as a ready-made product? (not a kit)
>
> They make such things for FM, what about TV?
>
> Thanks,
> -Bill Kearney
>

[BruceR]

None of those units will do what the OP requested which is to BROADCAST
the signal. The modulators listed will all do a fine job over a
hardwired connection but do not send the signal via wirelesss. The unit
I referred to on ebay is indeed a transmitter as requested.



"B Fuhrmann" <b-fuhrmann-usenet@mplsfridayDELETEskate.com> wrote in
message news:122dh95a3fl3h58@corp.supernews.com...
You should be able to find them locally in most cities.
Look at Radio Shack, Best Buy, or other stores that carry AV equipment.

www.radioshack.com/product/index.jsp?productId=2103095
$30 ready made, outputs on channel 3.

/www.radioshack.com/product/index.jsp?productId=2103585
$3 would need some hacking to change plug and add power.

http://www.bestbuy.com/site/olspage.jsp?skuId=5806345&productCategoryId=pcmcat50000050019&type=product&tab=1&id=1067388827858
$20

http://www.walmart.com/catalog/product.do?product_id=2181628
$24

http://www.target.com/gp/detail.html/sr=2-2/qid=1143390335/ref=sr_2_2/602-7024894-7671837?%5Fencoding=UTF8&asin=B00008XKYS
$20 - looks like it might have a DC power input

10 feet should be nothing for this type of device and the image quality
is probably better than the camera (assuming a low cost camera instead
of a camcorder quality one).

A big question is power source. Ones designed for home use will
typically be 120VAC. FM modulators for cars (run on 12 VDC) are very
common but the Car AV people assume that people will have video displays
with direct video input.

You can probably convert any of the 120 volt units to DC by going inside
and finding the AC to DC conversion in it.
The game converter will be running on DC from the game console that is
in the plug with the video. You would need to discover the voltage and
wire connections.

If you can find a home oriented unit with a wall transformer, you have
an easier job since it is probably marked for voltage needed and the
connection is obvious.


Bill Fuhrmann

"Bill Kearney" <wkearney99@hotmail.com> wrote in message
news:EM2dnZV9JYLwfrjZRVn-qw@speakeasy.net...
> What's available for actually transmitting an RF channel 3 signal,
> say,
> about 10 feet?
>
> As in, push a signal from belowdecks on a boat up to a portable
> television.
> That is, to a TV that's got nothing other than it's regular RF tuner.
> No
> video, s-video or even a female F-connectors. It doesn't have to be
> specifically channel 3 of course, but any other channel that a regular
> TV
> might be able to pick up.
>
> Anybody make such a thing as a ready-made product? (not a kit)
>
> They make such things for FM, what about TV?
>
> Thanks,
> -Bill Kearney
>

[BruceR]

I've never tried that unit but years ago I used similar units that gave
a very clear picture so I'd expect this would do the job. The guy has
good feedback with lots of people saying it's good and he has a pretty
good return policy if you don't like it. Let us know how it works if you
get one.


> "BruceR" <br@NOhawaiiSPAM.com> wrote in message
> news:SOmVf.14580$%d.7354@tornado.socal.rr.com...
>> ebay my friend! For 35 bucks you're in business sending to UHF
>> frequencies (Chnl 14-51). All TV's since the 60's have UHF tuners so
>> you should be good to go.
>
> How's the picture quality? Decent enough to compare to a regular
> channel 3 RF output from a source device?
>
> If so that looks like just the ticket.
>
> -Bill

[B Fuhrmann]

"BruceR" wrote
> None of those units will do what the OP requested which is to BROADCAST
> the signal. The modulators listed will all do a fine job over a hardwired
> connection but do not send the signal via wirelesss. The unit I referred
> to on ebay is indeed a transmitter as requested.

You may have to show me where he says "BROADCAST" or wireless.

He says transmit, which is also applicable to sending a signal over wires.
He then said
>> As in, push a signal from belowdecks on a boat up to a portable
>> television.
>> That is, to a TV that's got nothing other than it's regular RF tuner.
He also specified that there is no F connector on the TV.

I have never seen a TV that has no antenna or any way to connect one. That
would make it pretty useless.
Even if it just has a broken single extendable antenna, he could connect the
wire to it to get the signal in. It would not be a proper impedence match
but would most likely be more than good enough.

--
Bill Fuhrmann






> "B Fuhrmann" <b-fuhrmann-usenet@mplsfridayDELETEskate.com> wrote in
> message news:122dh95a3fl3h58@corp.supernews.com...
> You should be able to find them locally in most cities.
> Look at Radio Shack, Best Buy, or other stores that carry AV equipment.
>
> www.radioshack.com/product/index.jsp?productId=2103095
> $30 ready made, outputs on channel 3.
>
> /www.radioshack.com/product/index.jsp?productId=2103585
> $3 would need some hacking to change plug and add power.
>
> http://www.bestbuy.com/site/olspage.jsp?skuId=5806345&productCategoryId=pcmcat50000050019&type=product&tab=1&id=1067388827858
> $20
>
> http://www.walmart.com/catalog/product.do?product_id=2181628
> $24
>
> http://www.target.com/gp/detail.html/sr=2-2/qid=1143390335/ref=sr_2_2/602-7024894-7671837?%5Fencoding=UTF8&asin=B00008XKYS
> $20 - looks like it might have a DC power input
>
> 10 feet should be nothing for this type of device and the image quality is
> probably better than the camera (assuming a low cost camera instead of a
> camcorder quality one).
>
> A big question is power source. Ones designed for home use will typically
> be 120VAC. FM modulators for cars (run on 12 VDC) are very common but the
> Car AV people assume that people will have video displays with direct
> video input.
>
> You can probably convert any of the 120 volt units to DC by going inside
> and finding the AC to DC conversion in it.
> The game converter will be running on DC from the game console that is in
> the plug with the video. You would need to discover the voltage and wire
> connections.
>
> If you can find a home oriented unit with a wall transformer, you have an
> easier job since it is probably marked for voltage needed and the
> connection is obvious.
>
>
> Bill Fuhrmann
>
> "Bill Kearney" <wkearney99@hotmail.com> wrote in message
> news:EM2dnZV9JYLwfrjZRVn-qw@speakeasy.net...
>> What's available for actually transmitting an RF channel 3 signal, say,
>> about 10 feet?
>>
>> As in, push a signal from belowdecks on a boat up to a portable
>> television.
>> That is, to a TV that's got nothing other than it's regular RF tuner. No
>> video, s-video or even a female F-connectors. It doesn't have to be
>> specifically channel 3 of course, but any other channel that a regular TV
>> might be able to pick up.
>>
>> Anybody make such a thing as a ready-made product? (not a kit)
>>
>> They make such things for FM, what about TV?
>>
>> Thanks,
>> -Bill Kearney
>>
>

[BruceR]

I took it to mean broadcast over the air because he refers to the
following:
- the term "actually transmitting"; In concert with the info below, I
took that term to mean "over the air."
- at least a 10 ft range; range wouldn't be an issue with a wired
solution (at least not the lengths we'd be talking about on a boat).
- the term "pick up" a signal; implies (again, to me) a wireless
signal.
- no inputs other than, presumably, an antenna; leads me to conclude
wireless rather than a piece of coax wrapped around a rabbit ear.
-refers to "similar things for FM"; small FM wireless transmitters are
very common (moreso than wired FM modulators) and I concluded he was
referring to those.
Of course, all of this is based on MY conclusions and perhaps Bill will
clarify further. In any case, I think he now has a comprehensive
collection of options from which to choose.




> "BruceR" wrote
>> None of those units will do what the OP requested which is to
>> BROADCAST the signal. The modulators listed will all do a fine job
>> over a hardwired connection but do not send the signal via
>> wirelesss. The unit I referred to on ebay is indeed a transmitter
>> as requested.
>
> You may have to show me where he says "BROADCAST" or wireless.
>
> He says transmit, which is also applicable to sending a signal over
> wires. He then said
>>> As in, push a signal from belowdecks on a boat up to a portable
>>> television.
>>> That is, to a TV that's got nothing other than it's regular RF
>>> tuner.
> He also specified that there is no F connector on the TV.
>
> I have never seen a TV that has no antenna or any way to connect one.
> That would make it pretty useless.
> Even if it just has a broken single extendable antenna, he could
> connect the wire to it to get the signal in. It would not be a
> proper impedence match but would most likely be more than good enough.
>
>
>> "B Fuhrmann" <b-fuhrmann-usenet@mplsfridayDELETEskate.com> wrote in
>> message news:122dh95a3fl3h58@corp.supernews.com...
>> You should be able to find them locally in most cities.
>> Look at Radio Shack, Best Buy, or other stores that carry AV
>> equipment. www.radioshack.com/product/index.jsp?productId=2103095
>> $30 ready made, outputs on channel 3.
>>
>> /www.radioshack.com/product/index.jsp?productId=2103585
>> $3 would need some hacking to change plug and add power.
>>
>> http://www.bestbuy.com/site/olspage.jsp?skuId=5806345&productCategoryId=pcmcat50000050019&type=product&tab=1&id=1067388827858
>> $20
>>
>> http://www.walmart.com/catalog/product.do?product_id=2181628
>> $24
>>
>> http://www.target.com/gp/detail.html/sr=2-2/qid=1143390335/ref=sr_2_2/602-7024894-7671837?%5Fencoding=UTF8&asin=B00008XKYS
>> $20 - looks like it might have a DC power input
>>
>> 10 feet should be nothing for this type of device and the image
>> quality is probably better than the camera (assuming a low cost
>> camera instead of a camcorder quality one).
>>
>> A big question is power source. Ones designed for home use will
>> typically be 120VAC. FM modulators for cars (run on 12 VDC) are
>> very common but the Car AV people assume that people will have video
>> displays with direct video input.
>>
>> You can probably convert any of the 120 volt units to DC by going
>> inside and finding the AC to DC conversion in it.
>> The game converter will be running on DC from the game console that
>> is in the plug with the video. You would need to discover the
>> voltage and wire connections.
>>
>> If you can find a home oriented unit with a wall transformer, you
>> have an easier job since it is probably marked for voltage needed
>> and the connection is obvious.
>>
>>
>> Bill Fuhrmann
>>
>> "Bill Kearney" <wkearney99@hotmail.com> wrote in message
>> news:EM2dnZV9JYLwfrjZRVn-qw@speakeasy.net...
>>> What's available for actually transmitting an RF channel 3 signal,
>>> say, about 10 feet?
>>>
>>> As in, push a signal from belowdecks on a boat up to a portable
>>> television.
>>> That is, to a TV that's got nothing other than it's regular RF
>>> tuner. No video, s-video or even a female F-connectors. It
>>> doesn't have to be specifically channel 3 of course, but any other
>>> channel that a regular TV might be able to pick up.
>>>
>>> Anybody make such a thing as a ready-made product? (not a kit)
>>>
>>> They make such things for FM, what about TV?
>>>
>>> Thanks,
>>> -Bill Kearney

[Robert L Bass]

> You may have to show me where he says "BROADCAST" or wireless.

Reading the OP's post I also took it to mean he wanted an over-the-air
transmission.

--

Regards,
Robert L Bass

Bass Burglar Alarms
The Online DIY Store
http://www.BassBurglarAlarms.com

--

Never underestimate the power of very stupid people in large groups.

[Bill Kearney]

"B Fuhrmann" <b-fuhrmann-usenet@mplsfridayDELETEskate.com> wrote in message
news:122dh95a3fl3h58@corp.supernews.com...
You should be able to find them locally in most cities.
Look at Radio Shack, Best Buy, or other stores that carry AV equipment.

Um, I'm not looking for a modulator. I'm looking for a TRANSMITTER. As in,
no wires.

It's a boat (a 37' express cruiser) so stringing wires along the deck is
unsafe not to mention unsightly. Running it behind the bulkheads often
redefines pain in the ass. Portable TVs don't often have too many external
inputs. And even if they did the marine environment is rather harsh on
connectors. Thus just pumping out an RF signal as a TV channel is the most
reasonable solution.

Sorry you spent so much time digging up links for entirely inappropriate
devices, but thanks anyway!

Bruce: I bought one of those ebay jobbies, thanks for the link! I'll report
back on it's quality.

-Bill Kearney

[BruceR]

I'll look forward to hearing about how it works.


> "B Fuhrmann" <b-fuhrmann-usenet@mplsfridayDELETEskate.com> wrote in
> message news:122dh95a3fl3h58@corp.supernews.com...
> You should be able to find them locally in most cities.
> Look at Radio Shack, Best Buy, or other stores that carry AV
> equipment.
>
> Um, I'm not looking for a modulator. I'm looking for a TRANSMITTER.
> As in, no wires.
>
> It's a boat (a 37' express cruiser) so stringing wires along the deck
> is unsafe not to mention unsightly. Running it behind the bulkheads
> often redefines pain in the ass. Portable TVs don't often have too
> many external inputs. And even if they did the marine environment is
> rather harsh on connectors. Thus just pumping out an RF signal as a
> TV channel is the most reasonable solution.
>
> Sorry you spent so much time digging up links for entirely
> inappropriate devices, but thanks anyway!
>
> Bruce: I bought one of those ebay jobbies, thanks for the link! I'll
> report back on it's quality.
>
> -Bill Kearney