› Forums › Radionics › Pirate Radio › Fm radio transmitter
- This topic has 13 replies, 4 voices, and was last updated March 24, 2014 at 12:02 pm by maxtek73.
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September 22, 2010 at 2:55 pm #1049702
4 Watt PLL FM Radio Broadcast Transmitter 87.5 – 108 MHz
WITH NEW IMPROVED HARMONIC RESPONSE BETTER THAN -50 dB, PLUS NO-TUNE AMP!
REQUIRES NO TEST EQUIPMENT WHATSOEVER TO SET UP, TUNE OR CHANGE OPERATING FREQUENCY. THIS IS VERY USER FRIENDLY!
This unit is based on the famous Veronica design with some modern component improvements and design updates, it is basic, reliable and fulfils what you want for dependable use.
The sound quality is exceptional featuring a quality TOKO dual varicap diode you’ll sound the same as the big stations and the frequency stability being PLL is perfect, what’s more NO test equipment is required to set up! This transmitter could be used for days on end without failure. This unit is perfectly capable of being driven with stereo coders and RDS encoders also. All the components are quality branded OEM from manufacturers: SGS Thomson, Philips, Fairchild, Texas Instruments, Motorola, Mitsubishi and more, no cheap Chinese fakes in this transmitter. The whole unit is constructed on quality 1 oz British made FR4 Fibre glass PCB and the development to soldering the components is completed in house.
Testing 98.00MHz @15V D.C. produces over 4 Watts output and from 87.5 ~ 108MHz will produce at least 4 Watts still. This is the transmitter that keeps on going when the others fail. Transmission range is about 3-4 miles with a correctly sited no gain antenna on an average receiver
One unique feature for this transmitter compared to many is the availability of parts. All parts are off the shelf, no secretly programmed micro controllers etc and in the extremely unlikely event a replacement component is required you will be able to obtain spares virtually anywhere in the world!
It is supplied with flying leads for connections to antenna, D.C. power and audio, these are a nominal 300mm in length each. Also included is the antennae.
Remember this is not a kit but a fully assembled unit.
Instructions will be provided on paper with the unit for easy tuning to another frequency.
Specification
• Frequency Generation : Crystal Reference Phase Locked Loop
• Frequency Stability : +/- 1KHz Max typically +/- 500Hz
• Lock Time : Typically 3 seconds
• Harmonic Output : Better than -50 dB
• Spurious Output : Better than –70 dB to the carrier
• RF Power Output : Typically 4 Watt average across the band
• Power Supply : 15V 1 amp nominal regulated
• Audio Input : 1 Volt RMS Max
• S/N Ratio : Better than 75 dBu
• Audio Response : 20Hz ~ 76KHz
• Pre – Emphasis : 50uS as standard, 75uS on request.
• Audio Distortion : Better than 0.2% THD
• Output impedance : 50Ω
This just needs a power supply and to be housed in a box. I also recommend that it is used with a audio limiter.
December 15, 2010 at 4:25 pm #1229150Bump
January 10, 2011 at 11:43 am #1229151£100ono
January 10, 2011 at 4:16 pm #1229143thats a bargain, and a really nice bit of kit…
I came really close to buying this at one point but because of work I have to stay on the right side of Ofcom and the Old bill, I work with high tech radio-based stuff people safety and lives depend on so can’t really justify playing around with illegal FM kit, especially with the bad rep pirates have got at the moment..
I hope it goes to a good home as I’d wanted one of them for about 20 years…
January 24, 2012 at 1:12 pm #1229144did you ever sell this in the end? I was so fucking tempted to ride up to your area with the cash… that said whilst I can’t get directly involved, if anyone is firing it up locally let me know and I will at least try and listen out and warn them if they are making QRM hopefully before Ofcom do… although its a nice design if you overmod it it will splatter into other stations airwaves and the aircraft comms, neither of which is good..
January 24, 2012 at 2:52 pm #1229152No i didn’t sell it in the end.
Got it put into a metal housing with power supply and compressor now so hopefully might help it sell.
I don’t know of anyone who doing pirate atm in our area.
January 24, 2012 at 3:14 pm #1229145@damo666 464614 wrote:
No i didn’t sell it in the end.
Got it put into a metal housing with power supply and compressor now so hopefully might help it sell.
I don’t know of anyone who doing pirate atm in our area.
that film of the old boy from NL is also linked to the people what designed the TX, as his studio had a compressor (one of the first) although TBH you are better off using it just as a limiter without trashing the dynamic range (as some presenters on ICR FM seem to do)
its a bit on top as both London and eastern Ofcom cover this area because of the amount of aircraft flying over EA – interference to these is the main issue as fire brigade and ambos are now on airwave digital (although a bad rig set to the low end of band II can knock out comms for taxicabs).
my mate had a drum and bass tape where halfway through is
PAN PAN – PAN PAN – PAN PAN (this is an emergency call – French for a “bang” (as in firing a distress rocket and also sounds like “en panne” which means mechanical breakdown).
LONDON TOWER THIS IS SPEEDBIRD 857 SPEEDBIRD 857
I HAVE COMMS PROBLEMS, I AM HEARING MUSIC IN MY HEADSET
PAN PAN SPEEDBIRD 857 OVERthis resulted in every plane being stacked/circled around Heathrow until Ofcom and the Fire Brigade tracked and disabled the TX, that crew got in a lot of shit for this..
February 19, 2012 at 11:00 pm #1229153This is now housed in a metal casing with a compressor fitted to it price of this item is now £160 with the new added extras.
February 20, 2012 at 7:36 am #1229149
We have a pirate-radio station in Copenhagen ATM ‘Byens Radio’, they send on FM 89,7mhz
The authorities try to find and shut them down but until now they have had no luck with that…
I cant receive it here where I am living as it too far from where they transmit from.But I will have some look into that because with the right antenna I think it will be possible
They have a facebook page if anyone is interested in contacting them;
Byens Radio 89,7 fm | Facebook
and the upload reruns of their shows here;
…and when was hunting for these links I found out there is another pirate-radio here in DK they transmitting from south-jutland (sønder jylland) in Aabenraa area
They call them selves Abol FM and transmit on FM 96,9mhz
February 21, 2012 at 9:17 am #1229146@!sinner69! 468821 wrote:
The authorities try to find and shut them down but until now they have had no luck with that…
I cant receive it here where I am living as it too far from where they transmit from.But I will have some look into that because with the right antenna I think it will be possible
Provided there isn’t a hill between you and the TX site (I would check this on a contour map from your national defence ministry or whoever makes them for your country, I don’t trust Google Earth and NASA to map small countries correctly) a 5 or 7 element Yagi beam should receive it. I have to use the 3 element to get stereo from the local community radio station as Ofcom limit their power to only 20W…
But no amount of antennas will make VHF go through a hill (this is why I can only receive Bawdsey and not Walton Coastguard transmissions).
February 6, 2014 at 12:49 pm #1229147The Danish pirate station Byens Radio is still going!
I think though that DK will let some go provided the power is not too strong and it is not across another stations frequency allocation (Denmark actually is where all of Europe decides what are correct radio frequencies to use for every gadget). In fact Denmark closed down IT og Telestyrelsen (communications Ministry) and gave the functions back to the old government departments (trade and industry and culture ministry) which would hint that they do not have many problems with badly operated radio equipment.
NL was tolerant until people took the piss (such as farmers using a 15 000 W TX on the German border but fed by 3 phase genset with neither earth ground nor RF(signal) ground and the TX propped up on Grolsch crates as insulator, then have a party in the same barn. Not only does the stray RF piss off BNetzA as well as Agentschap, it is not good for the health to have that much radiation where humans or animals are staying. 100W-250W max, and that only on the roofspace at least 20 or 30m above, and good earth at all points.
No wonder all the jongens go bald from their late teens onwards, and meisjes often suffer from bad “womens problems” that can affect fertility…
March 24, 2014 at 6:37 am #1229154WHY DON’T YOU TELL US WHAT YOUR ASKING FOR IT? ALL YOU DO IS MENTION TECHNICAL INFORMATION, YOU MENTION NOTHING ABOUT THE CONDITION, IT’S AGE, HOW MUCH YOU WANT FOR IT, AND OTHER IMPORTANT THINGS I NEED TO KNOW BEFORE I JUST IGNORE THIS AD, I MEAN IT WOULD SEEM A LOT EASIER TO FIND A SELLER WHO PUTS ALL HIS CARDS ON THE TABLE!. NOT SOMEONE THAT HIDES THE ONE MOST IMPORTANT DETAIL RELATING TO ACQUIRING OWNERSHIP. IN FACT I AM WAY LESS LIKELY TO FOLLOW THROUGH ON BUYING SOMETHING WHERE THE INFORMATION IS BLEAK.
March 24, 2014 at 6:42 am #1229155IM GUESSING YOU WANT $164.99 ?
March 24, 2014 at 12:02 pm #1229148The ad is several years old. At the time Damo lived in a coastal town in England not too far away from myself, I’m not sure if he did sell it in the end or still has it hidden away somewhere (he decided against using it in that area because of the high risk of being caught in a small part of a small country right next door to where radar was invented and there are other monitoring agencies).
if you are quoting (presumably) US dollars you would be better off buying one within the US, various companies sell them (it is apparently permitted to use some low power kinds and the FCC are licensing more smaller stations anyway), it would cost a fair bit to ship it from England, the US Customs often delay things like this as it makes them suspicious and you would still have to modify the audio stage or the pre-emphasis will be incorrect (Europe uses a diferent standard).
Even the Dutch say the recent Chinese 20W all in one transmitters are of surprisingly good quality for the price (and may be able to change between both EU and US standards as well as use the Japanese and Soviet frequencies). They are often on Ebay and the suppliers will send them to USA and NL (or there may be local importers) though its not so easy to get them imported to England (classed as a restricted item in this country)
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› Forums › Radionics › Pirate Radio › Fm radio transmitter