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DIY:

The best would be to purchase a PLL Transmitter as these don’t change frequency and it

Must be 1W or Over! Or the range will be disappointing! Unless you have a Amplifier!

 

U can get a kit at                                      (If you are in South Africa) Order code AB203 & AB204

U must buy both kits to make a PLL Transmitter!

 

 

FM05TXNV PLL 

 

NEW VERSION NOW AVAILABLE

A very clean fm transmitter with the following features:

q       adjustable RF out power

q       excellent spectral purity

q       frequency is displayed

q       no-transmit while PLL is unlocked.

 

Each unit is FULLY ASSEMBLED AND TESTED and comes with FULL SCHEMATICS and instructions

Price List of their Stuff & Equipment

 

 

U will also need a Antenna I don’t know where to buy one but it can be easily constructed (see Antenna:)

 

 

Disclaimer: Any illegal use of  information and ideas shown in these pages is punished by the law of your country, I decline any responsibility for the illegal use of these pages and for the damages that they should cause to anyone or to anything. Use it at your own risk!!! You have been Warned!!!!!

 

 

News Flash!!!

Im looking for Some BB809 Varicap diodes to complete a pll transmitter (with lcd) I’m working on

If you have any to donate or sell please send me E-Mail as im in desperate need of one or two

Download it here!

Will post schematics & documentation as soon as I’ve tested & Reviewed it!

 

 

DIY PLL Transmitter:

I am busy trying to build a Pll fm transmitter & boy is it not easy

Part sourcing  especially here in South Africa

Im busy building the RDVV 8w Pll with Lcd & Portable fm 1w fm Transmitter

                            

 

Ill post a few after I have successfully completed one

Here are some you can look at :

 

• Portable FM transmitter 1 W (This small FM transmitter includes a limiter, a microphone amplifier and a PLL digital tuning)
• 1W Veronica PLL Transmitter  (The VERONICA transmitter is a very stable, powerful, and high quality FM emitter)
• Radio -Transmitters – Get yourself on Air Schematics fM, CW, LW, MW, SW, TV ect.

 

 

DIY VFO Transmitter:

 

I made a Simple 4W (with modifications for stability) and Patricks 7W Transmitter (nice one!) J

They Both Work Well but I wouldn’t suggest making your own transmitter as there is a whole lot

That goes into transmitters! The schematic is only 10% of the work! The PCB 45% & Construction 45%

Other wise it will not work! Or might disturb your neighbors TV or other radio stations and get yourself into a

Whole lot of trouble!

 

Why DIY? Well It was cheaper (PLL transmitter R1200) and well worth the knowledge for me to go DIY

But it was a long Learning process, which took a lot of Time, Mistakes and a lot of Research!

 

That’s why I’ll Still say BUY YourSelf A PLL TRANSMITTER!

Have a look @ the FM05TXNV PLL

 

For anyone who would like to send me a Transmitter or Kit

to Review & Test I would be glad to just Send me MAIL!

 

But for those who still want to go DIY read On

For those who have never made transmitters & would like to go DIY I would suggest should start with

Patrick’s 10mw then go on to his 200mw then to his 7W

 

For those who have built a transmitter before

I would suggest you start with  4W Transmitter as it has better stability, (my friend built one)

I made the simple 4W because I could not get hold of the VK200 chokes & found that stability is not that good

I had to tweak it a lot to get better stability (not forgetting the long warm up [+-45min] I have to wait before using it!)

Range +-2.5KM

 

I then moved on to the 7W transmitter though mine is 5.5W because I don’t wave the VK200 choke

(If anybody can supply me please send me a E-Mail I’m willing to purchase them, I also wouldn’t mind some freebies J )

This is a transmitter with very Good Stability +-10min warm up drift after turn on then nice & Stable, Range is good too

I achieved +-3.5KM as my antenna is not very high [about 6.5meters]  & that’s satisfactory for my use.

 

For those who have never made transmitters & would like to go DIY I would suggest should start with

Patrick’s 10mw then go on to his 200mw then to his 7W

 

 

WARNING : Any free running VFO transmitter with less than 4 Transistors for 50-100mW output or 5 transistors at 2-5W output (ie. no buffer stages, no voltage regulator for VFO) is probably highly unstable! and it's frequency of operation will keep on changing with time, temperature, battery levels, antenna type, proximity of other objects to transmitter. Please build the following transmitter circuits with this warning in mind

 

Cooming Soon

Diy 8W Pll Fm Transmitter with lcd!!!

 

 

          Transmitter Kits & Manufactures:

You can buy Commercial Kits & Pre Built Fm Transmitters from the following Links:

 

FM05TXPLL: A Very Clean 1W FM Transmitter with display!

ELECTRONICS 123:  (If you are in South Africa) Order code AB203 & AB204

PCS Electronics: Unique 4W PLL TX with LCD, built-in tuning circuitry.

Veronica Kits: FM PLL / VCO Transmitter Kits, Stereo Coders, Prebuilt systems

Broadcast Warehouse: FM PLL Transmitter Kits, Stereo Coders, Prebuilt systems

Smart Kits: Fm Transmitter kits

TRANSMITTERS 'R' US:(UK supplier of professional quality FM Transmitters, + AM, SW and TV transmission equipment)

 

 

     

      Or                                               (a Very Nice Digital Stereo FM Transmitter! You’ll need a Amplifier Though!)

                                                (They Have A account in South Africa So It’s Easier to buy)

 

                                                See Also Transmitter Kits & Manufactures! For other nice kits & Transmitters

 

 

Antenna:

For the antenna I use a Simple Open ½ wave Dipole Antenna that I made My self J

With a RG-59 (75 ohm) Coax Cable

·        The ~ Open Half-Wave Dipole ~ Antenna

·        Harold's Maiden Voyage of the Dipole Antenna

·        100MHz GROUND PLANE ANTENNA

 

Low Pass Filter:

I also added a low pass filter to make sure I keep my signal out of higher frequencies

So I don’t disturb TV & other transmission in higher frequencies

(like my transmitter was doing after initial construction :-)

It is a Must!!! To have one in your transmitter

Although some of the off the shelf transmitters have already

Filters built in!

 

·        The Filter I Use

·        Zip file with collection of  LP filters

·         

 

 

RF Amplifier:

 

This Is a RF Amplifier That I also built that works amazingly Well!

If you have a transmitter of about 200mW to about 500mW

It will amplify your signal to 5-6 Watts!

 

·        5-6Watt Amplifier

·        40 W Amplifier

(I Have Never built 40 W!!!)

 

 

 

 

 

Limiter / Compressor:

I currently have never built a limiter!! but it comes in handy to keep your transmitter

From over modulating. I use my pc software compressor to handle my limiting needs.

But here are all schematics I found

 

·        Zip with some limiters

 

 

Thanks to:      

• Patrick (Good Tutorial and step by step scroll to bottom!)
• Radio -Transmitters – Get yourself on Air Schematics fM, CW, LW, MW, SW, TV ect.
• 4W Transmitter (recommended rather than the Simple4W Transmitter)
• Simple 4W Transmitter
• Trio Pirate (zip file with a lot of info)
• Electronics Lab (collection of Rf Circuits)
• Whole Lot Info (lots & lots of info)
• http://www.geocities.com/pdmtr/fm (nice info & Schematics)
• Radio QRP - The Art of Low Power and Clandestine Operations

 

for the info & Resources!

 

Groups to join…

ü      allpirateradio

ü      pirate-radio

ü      fm-radio

ü      The Radio and Transmiter Electronics

ü      WNKR

 

 

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Last Update : 19 May 2005