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#1
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I was thinking I could get a small fm transmitter to hook up to my
board. Then I can reference a mix on the home stereo and the car stereo without burning countless cd's. So... where do i get it, who makes an appropriate one, etc...? Nate |
#2
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![]() Nate Najar wrote: a small fm transmitter http://www.ccrane.com/radios/fm-tran...ansmitter.aspx -- "Coloured and animated, the concerts and spectacles are as many invitations to discover the universes of musicians and artists who tint with happiness our reality." To reach me reverse: moc(dot)xobop(at)ggestran |
#3
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Nate Najar wrote:
I was thinking I could get a small fm transmitter to hook up to my board. Then I can reference a mix on the home stereo and the car stereo without burning countless cd's. So... where do i get it, who makes an appropriate one, etc...? Go to Wal-Mart, or any nearby truckstop. Look at the XM Radio and Sirius displays, for little gadgets intended to send the line output of your satellite radio to your car radio. I even saw one at Staples the other day. Hurry now, since a lot of these things flagrantly violate FCC Part 15 regulations and a lot of noncomm stations have been complaining about interference from them. --scott -- "C'est un Nagra. C'est suisse, et tres, tres precis." |
#4
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Nate Najar wrote:
I was thinking I could get a small fm transmitter to hook up to my board. Then I can reference a mix on the home stereo and the car stereo without burning countless cd's. So... where do i get it, who makes an appropriate one, etc...? Nate Uh...Google? "Web Results 1 - 10 of about 7,320,000 for "FM transmitter". (0.51 seconds)" Narrow your search by including other terms. jak |
#5
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![]() jakdedert wrote: Nate Najar wrote: I was thinking I could get a small fm transmitter to hook up to my board. Then I can reference a mix on the home stereo and the car stereo without burning countless cd's. So... where do i get it, who makes an appropriate one, etc...? Nate Uh...Google? "Web Results 1 - 10 of about 7,320,000 for "FM transmitter". (0.51 seconds)" Narrow your search by including other terms. jak the problem is that the legal ones cannot go very far. the FCC rules limit the field strength to something like 150uV/meter at 3 feet (IRRC) There are plenty of illegal ones to be had however... If you want it to sound anything like it will sound "on the radio" you are going to have to compress the S**T out of the audio first. Mark |
#6
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"Mark" wrote ...
the problem is that the legal ones cannot go very far. the FCC rules limit the field strength to something like 150uV/meter at 3 feet (IRRC) I believe Part 15 specifies the limit of a "10-foot" antenna, and 100mW of power to the "final". |
#7
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I believe Part 15 specifies the limit of a "10-foot"
antenna, and 100mW of power to the "final". That's for AM (MW). |
#8
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"William Sommerwerck" wrote ...
I believe Part 15 specifies the limit of a "10-foot" antenna, and 100mW of power to the "final". That's for AM (MW). Thats for Part-15 (all modulations including AM and FM) |
#9
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"William Sommerwerck" wrote ...
I believe Part 15 specifies the limit of a "10-foot" antenna, and 100mW of power to the "final". That's for AM (MW). The limits for FM are equivalent, but stated in terms of radiation levels. |
#10
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Nate Najar wrote:
I was thinking I could get a small fm transmitter to hook up to my board. Then I can reference a mix on the home stereo and the car stereo without burning countless cd's. So... where do i get it, who makes an appropriate one, etc...? Nate Use a flash memory transmitter such as the Virtual Reality VRFM8: http://nextpowerusa.stores.yahoo.net/viresolavr3v2.html $25 ~ $35 Transfer mix wavefiles from computer to flash drive. Plug flash drive into VRFM8 which in turn plugs into the cigarette lighter in the car. Tune appropriatly and you are on the FM radio. To get "that FM sound" though requires something like an Optimod or Aphex processor chain and then you still have to pick what settings you guess the particular broadcast station will be abusing your music with. Note, the Orban and Aphex equipment can be used intelligently for broadcast / musical benefit but in today's market that often isn't the case. bobs Bob Smith BS Studios we organize chaos http://www.bsstudios.com |
#11
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Nate Najar wrote:
I was thinking I could get a small fm transmitter to hook up to my board. Then I can reference a mix on the home stereo and the car stereo without burning countless cd's. So... where do i get it, who makes an appropriate one, etc...? Nate Ramsey Electronics offers several relevant products in kit form. http://www.ramseyelectronics.com -- ================================================== ====================== Michael Kesti | "And like, one and one don't make | two, one and one make one." mrkesti at hotmail dot com | - The Who, Bargain |
#12
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On Jul 23, 2006, Michael R. Kesti commented:
Ramsey Electronics offers several relevant products in kit form. ------------------------------snip------------------------------ And several sellers on eBay will assemble them for a small fee. I see a few that are modified for higher output, as long as you don't mind running the risk of an FCC fine. --MFW |
#13
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No it's not equivalent, I had it wrong, its 250 uV/meter
measured at 3 meters. This is a LOT less than the equivalent field from 100 mW in a 10 foor antenna. That's pretty weak -- about 60uV to a half-wave antenna. Okay for mono, marginal for stereo. |
#14
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![]() "Richard Crowley" wrote in message ... "Mark" wrote ... the problem is that the legal ones cannot go very far. the FCC rules limit the field strength to something like 150uV/meter at 3 feet (IRRC) I believe Part 15 specifies the limit of a "10-foot" antenna, and 100mW of power to the "final". I built a Ramsey electronics tunable fm transmitter it was explained to me that the fcc does not care about "transmitter" power or antenna design or size the part 15 is based on measured feild strength at some set distance from the antenna I have not used mine sinceI built it out of fear that the fcc will impound and auction everthing else audio I own saying it was support gear for the 1 watt trasmitter I built(this is within thier rights as well as something like 25,000$ fine per occourance) it just became to risky to use George |
#15
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On 23 Jul 2006 08:22:20 -0700, "Mark" wrote:
If you want it to sound anything like it will sound "on the radio" you are going to have to compress the S**T out of the audio first. Mark Not if you're listening to one of my stations :-) Julian |
#16
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On Mon, 24 Jul 2006 00:04:31 GMT, "George Gleason"
wrote: I built a Ramsey electronics tunable fm transmitter it was explained to me that the fcc does not care about "transmitter" power or antenna design or size the part 15 is based on measured feild strength at some set distance from the antenna I have not used mine sinceI built it out of fear that the fcc will impound and auction everthing else audio I own saying it was support gear for the 1 watt trasmitter I built(this is within thier rights as well as something like 25,000$ fine per occourance) it just became to risky to use George George, You worry too much. Go ahead and try it out. Adjust it to where you think it is supposed to be and you'll probably be legal anyway. The FCC guys aren't sitting around waiting to bust people like you if you are a few uV too high! I talked to a guy who had a small transmitter for his antique radio shop broadcasting so people in his shop could hear old Burns and Allen and Jack Benny programs. The FCC received him up and decided he was over powered and politely helped him re-adjust his transmitter so he was legal. No fine. The odds of you getting a fine are probably less than you winning the lottery. Julian |
#17
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#18
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Michael R. Kesti wrote:
Nate Najar wrote: I was thinking I could get a small fm transmitter to hook up to my board. Then I can reference a mix on the home stereo and the car stereo without burning countless cd's. So... where do i get it, who makes an appropriate one, etc...? Nate Ramsey Electronics offers several relevant products in kit form. http://www.ramseyelectronics.com *Very* cool! Anybody else got links to kit sites? Bob -- "Things should be described as simply as possible, but no simpler." A. Einstein |
#19
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You worry too much. Go ahead and try it out. Adjust it to where you
think it is supposed to be and you'll probably be legal anyway. The FCC guys aren't sitting around waiting to bust people like you if you are a few uV too high! If you don't cause interference with other stations, you're unlikely to be noticed. Make sure you're at least two channels away from any other station, especially the weak ones. |
#20
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![]() "Julian" wrote in message ... On Mon, 24 Jul 2006 00:04:31 GMT, "George Gleason" wrote: I built a Ramsey electronics tunable fm transmitter it was explained to me that the fcc does not care about "transmitter" power or antenna design or size the part 15 is based on measured feild strength at some set distance from the antenna I have not used mine sinceI built it out of fear that the fcc will impound and auction everthing else audio I own saying it was support gear for the 1 watt trasmitter I built(this is within thier rights as well as something like 25,000$ fine per occourance) it just became to risky to use George George, You worry too much. Go ahead and try it out. Adjust it to where you think it is supposed to be and you'll probably be legal anyway. The FCC guys aren't sitting around waiting to bust people like you if you are a few uV too high! Thank you I really wanted to put it in service sending feeds to battery powered speakers I set up large outdoor car shows , some times going 1/2 mile from the annoucer location I buit the transmitter to avoid having to drop several 600 foot speaker cables I thought a radio link to speakers running off a car radios,and car battries would be just the ticket I may exlore that further now George |
#21
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#22
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"George Gleason" wrote ...
I really wanted to put it in service sending feeds to battery powered speakers I set up large outdoor car shows , some times going 1/2 mile from the annoucer location I buit the transmitter to avoid having to drop several 600 foot speaker cables I thought a radio link to speakers running off a car radios,and car battries would be just the ticket I may exlore that further now Wireless microphone equipment is frequently used for that kind of application. Very frequently used on movie sets, and even for feeding audio to those big events on the Washington DC mall where speaker towers are blocks apart, etc. Some wireless-mic equipment is specially rigged for feeding line-level signals (in and out). |
#23
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"Bob Cain" wrote ...
*Very* cool! Anybody else got links to kit sites? http://gbppr.dyndns.org/PROJ/lpfm/index.html |
#24
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![]() "Bob Cain" wrote in message ... Ramsey Electronics offers several relevant products in kit form. http://www.ramseyelectronics.com *Very* cool! Anybody else got links to kit sites? Bob -- http://www.broadcastwarehouse.com/ I have their 1 watt transmitter. Definitely a step above Ramsey in quality (and price). Ron |
#25
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![]() "Richard Crowley" wrote in message ... "George Gleason" wrote ... I really wanted to put it in service sending feeds to battery powered speakers I set up large outdoor car shows , some times going 1/2 mile from the annoucer location I buit the transmitter to avoid having to drop several 600 foot speaker cables I thought a radio link to speakers running off a car radios,and car battries would be just the ticket I may exlore that further now Wireless microphone equipment is frequently used for that kind of application. Very frequently used on movie sets, and even for feeding audio to those big events on the Washington DC mall where speaker towers are blocks apart, etc. Some wireless-mic equipment is specially rigged for feeding line-level signals (in and out). I have used every sort of wireless they all depend on line of sight I can not establish line of sight in the state parks I work the only unit that gave adaquate range was the lectrosonic, not in the price range I can deploy at a gig that pays 500$ george |
#26
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Richard Crowley wrote:
"Mark" wrote ... the problem is that the legal ones cannot go very far. the FCC rules limit the field strength to something like 150uV/meter at 3 feet (IRRC) I believe Part 15 specifies the limit of a "10-foot" antenna, and 100mW of power to the "final". Not any more. Current Part 15 rules mandate a particular emitted field strength at some distance from the transmitter. It's all academic, however, since the FCC does not enforce part 15 rules, and you can buy FM transmitters that exceed the limits at any department store now. --scott -- "C'est un Nagra. C'est suisse, et tres, tres precis." |
#27
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George Gleason wrote:
Thank you I really wanted to put it in service sending feeds to battery powered speakers I set up large outdoor car shows , some times going 1/2 mile from the annoucer location I buit the transmitter to avoid having to drop several 600 foot speaker cables I thought a radio link to speakers running off a car radios,and car battries would be just the ticket Umm... THAT will get you shut down. That's well beyond the levels that people are talking about for monitoring in their car. I may exlore that further now There are legal ways to do point-to-point RF links on licensed channels, which don't cost all that much. You may be able to find a used Marti rig, for instance. --scott -- "C'est un Nagra. C'est suisse, et tres, tres precis." |
#28
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#29
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On Mon, 24 Jul 2006 11:54:10 GMT, "George Gleason"
wrote: Thank you I really wanted to put it in service sending feeds to battery powered speakers I set up large outdoor car shows , some times going 1/2 mile from the annoucer location I buit the transmitter to avoid having to drop several 600 foot speaker cables I thought a radio link to speakers running off a car radios,and car battries would be just the ticket I may exlore that further now George These things are legal and are sold as consumer products so the FCC doesn't expect you to be a licensed broadcast engineer to operate one. If you do stupid stuff like operate on another station's frequency, turn the power up all the way, attach a stronger antenna and broadcast 24/7 you will probably get the FCC's attention. As long as you find a channel where there is nothing on frequency or on either side (ideally nothing on 2 ch's to either side) and operate the way the device is intended to, there should not be a problem. Yes, you should be concerned about interfering with ch6 TV too if there is one in your area and you are in the 90 - 91 MHz band. The rules are written strongly so as to be able to prosecute pirates, not responsible consumers. The use you describe is a good example of exactly why the FCC allows these devices to be manufactured. Have fun! Julian |
#30
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On Mon, 24 Jul 2006 13:59:39 GMT, "George Gleason"
wrote: I have used every sort of wireless they all depend on line of sight I can not establish line of sight in the state parks I work the only unit that gave adaquate range was the lectrosonic, not in the price range I can deploy at a gig that pays 500$ george FM radio is line of sight too. Julian |
#31
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wrote:
Also if you get the licensing you have higher power, regular commercial uhf business channels with proper licensing would give you higher power legally with better reliability. YOu're not feeding full range stereo with desire for high fidelity with these things I"d assume, so communications grade audio should be good enough. GO for the wireless mic frequencies with a license or regular commercial UHF business band, get the license, have the higher power and the advantages that come with it. I was presuming full range stereo. If you just need communications grade stuff, there are LOTS of alternatives out there, some of which are just solid as hell. I'd first start looking at low band VHF gear... there is a lot of it out there, and aside from the itinerant frequencies (and the broadcast aux frequencies), the licensed channels are dirt cheap. wIth these low power fm broadcast band transmitters you have to watch your field strength to remain within part 15 limits, but yet you want some height and possibly a gain antenna which would possibly put you over legal limits. terrain and even objects between transmitter and receiver can degrade the received signal and the way to combat that is better antenna systems and a little more wattage out the back end. I don't think I'd want to rely on something like that for an application that had to be reliable. Things like paging systems at outdoor events have to be reliable, if only because they sometimes have to be used for crowd manageent in crisis situations. --scott -- "C'est un Nagra. C'est suisse, et tres, tres precis." |
#32
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#33
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Julian wrote:
There are legal ways to do point-to-point RF links on licensed channels, which don't cost all that much. You may be able to find a used Marti rig, for instance. Which Marti rig are you referring to? I have a feeling this will be too much $. Sounds like he needs more than one receiver. Marti made all kinds of transmitters with wideband modulation, mostly in the 10W range, on the broadcast auxiliary channels. They were (and still are) sold for broadcast remote work. Since they have been making the things since the early 1950s, there are lots and lots of old ones out there. They show up at hamfests for next to nothing sometimes. --scott -- "C'est un Nagra. C'est suisse, et tres, tres precis." |
#34
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![]() "Julian" wrote in message ... On Mon, 24 Jul 2006 13:59:39 GMT, "George Gleason" wrote: I have used every sort of wireless they all depend on line of sight I can not establish line of sight in the state parks I work the only unit that gave adaquate range was the lectrosonic, not in the price range I can deploy at a gig that pays 500$ george FM radio is line of sight too. Julian humm, I was testing my little unit to see what it could do and maybe due to reflections or the phase of the moon it was working excellent on the other side of a hill and across the road(it was inside on my stereo console) from where I live definatly not any"line of sight" I could determine George |
#36
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![]() FYI http://www.mediageek.net/?p=1338 These are technically illegal...yes you can probably get away with it if you don't bother anybody, but you should know that if the signal can be heard well (i.e. in stereo without noise) over a few dozen feet, it is probably illegal. Mark |
#37
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#38
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In article ,
Julian wrote: On 24 Jul 2006 14:36:40 -0400, (Scott Dorsey) wrote: Marti made all kinds of transmitters with wideband modulation, mostly in the 10W range, on the broadcast auxiliary channels. They were (and still are) sold for broadcast remote work. Since they have been making the things since the early 1950s, there are lots and lots of old ones out there. They show up at hamfests for next to nothing sometimes. You're talking about the 950 MHz stuff? I don't think he'd be legal with that. That is frequency coordinated. It used to be a lot looser, but the FCC changed the rules about 3 years ago. Over the years, Marti made stuff in the 26 MHz band, the 450 MHz band, and the 950 MHz band. ALL of them are either coordinated (in the case of the broadcast auxiliary channels) or require the channel to be licensed specifically to the user (in the case of everything else). This is a GOOD thing. It means you aren't sharing a channel with everyone else. It means a little paperwork and some more money, but it's worth every penny. Incidentally, if anyone has any of the 26 Mhz Marti boxes with the reactance tube modulators in the junk box, I'm looking for one. To be honest I'd be interested in any of the low-band tube ones with the grey metal chassis and the male mike input jacks. --scott -- "C'est un Nagra. C'est suisse, et tres, tres precis." |
#39
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