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LuLu Style Tx's 10W carrier, 40W Peak, with Modulator, Mod Tranny + 6925 XTAL

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Stretchyman:
OK, not familiar with that chip (SN16913) but looks similar to a NE602 et al.

You can direct mod a DDS which would be interesting and similar to your setup, see;


http://www.analog.com/media/en/technical-documentation/application-notes/AN-423.pdf


Good to hear folk are still experimenting and building!

 :)

Stretchy.

EliteData:
I've been building my own transmitters since 1980.
the easiest ones are made from fm/am car radios (pll controlled) by simply by changing the pll Crystal frequency  from 10.7Mhz to 10.6Mhz (I use a variable cap) then using the LO output and modulating it from there.
then tuning the radio to 87.9 yields LO 98.5 output or 92.5 yields LO 103.1 output.
I've even modified an old 1980's era radio scanner to operate as a wideband transmitter.
everything that receives, transmits, albeit extremely low emissions without modifications though.
the best was when I was 13 on a school bus trip and the kid in the seat to my left was listening to the FM radio on his walkman, I took out my "modified" walkman and tuned around slowly until I heard his cut off (he had it loud on his headphones), I need not tell you that when I told him I was doing it, he got extremely mad, yelling like a child and tried valiantly to get the bus attendant to stop me but hey, I just have a walkman and I'm listening to the radio  ;D

Stretchyman:
Yep done the same with a single transisitor (somewhat simpler!) and done bogus radio shows for my local, 'I clean my car every day' neighbours, many a jolly laugh, Ha Ha!

Anyway we are departing from 'Advertising' my marvellous LuLu's.

I'm still to see a better or simpler design, i.e. 1 FET, 1 chip and 40W!

 ;)

boxcarro:
Great Story, Gotta add mine. in the 1963 I was in Junior High & smitten by a Popular communications "DIY" Article "Build a Home Brew 160 Meters Xmtr" and Built it, Had to also build a RF Signal Generator (Dad Bought me EICO Kit) (It was AM transformer) And finally got a Xtal from Oklahoma City, plopped my Radio on 1590 KCs, 10 Watts AM, I also had the Knight Kit Phono Oscillator, I could Turn Off Neighbours AM Radios listening to KAAY 1090 in Little Rock from a 1/2 Mile across the Cotton Fields around my house, then when they knew it was "Bernay" the 4 foot Handgrenade, They didn't Stomp me...I was the Hot Licks Guitar Kid in Saline County, Arkansas!
The off side was, whenever the local Sheriff or City Police had any Problem with their (35 MHz) Radios, I Was First Person Called, in case I was doing Mad Science on River Street! I was 14 Years Old. Had all kinds of Wires in the Elm Trees and Tall Oak Trees around the Home.

I Had read about a Pirate Radio Man who could not get Local Radio Stations to give him Air Time, in Pop'comm. He built his own Radio Station, got busted. He had written a book "Mytheology" I think he was in Ohio.

 I became a Hater of Television when JFK was shot, I was watching on TV, and started building Knight Kit SW Radios, and became certain that "Television Was Why Johnny K Was Killed" I figured Nixon Lost because JFK looked Better on TV" therefore: Television was 666 Image of Beast!

Sounds Crazy for a 14-15 Year Old Kid.....well, it was. I am 66 Years old NOW & I know I Was Correct, in a Twisted Way, after my Family took me to Uncle Edward L. Bernays Furneal (He died at 103 Years) I study a little about Freud & My Uncle, & My Grandmother Was a Administrator of Recrational Therapy at VA Hospitals & State Mental Hospitals, so I grew up a Book Worm & Offish Kid, only 1/2 Jewish (Wrong Half) I had no Connection, no Bar Mitzvah  , raised Epicopal, I Felt More Akin to the Voices on Short Waves, fom Far Wawy Places.....HCJB Quito Equidor, I Write Them for QSL.....put KITO, EQUIDOR on Enveloupe...LOL. I got QSL back anyway! I love radio, short wave radio. I have a 10 Meter Station (HTX100, Astron Power Supply, MFJ 931 Grounder, 1/4 Diaploe, but my Senior Apartemet is Inside Window into Well, All Building is Full of RF and Alumin Sidinf, I cannot even get 11 Meter RECEPTION, or AM BC Rception in my Aparment.


Why am I wriying all this? What is this FOERUM?

Of, LuLu Style 10 W Carrier AM Xmtr! Yeah...

I guess I am Oft Off Topic....(A PUN there!) My Old Brain is Lame....) Maybe Insane, Poets Often Speak in Thyime
Drunk of Wine, when Clocks Have No Time, DX is FINE! 73 de W5AWG

--- Quote from: EliteData on November 30, 2015, 1036 UTC ---I've been building my own transmitters since 1980.
1980's era radio scanner to operate as a wideband transmitter.
everything that receives, transmits, albeit extremely low emissions without modifications though.
the best was when I was 13 on a school bus trip and the kid in the seat to my left was listening to the FM radio on his walkman, I took out my "modified" walkman and tuned around slowly until I heard his cut off (he had it loud on his headphones), I need not tell you that when I told him I was doing it, he got extremely mad, yelling like a child and tried valiantly to get the bus attendant to stop me but hey, I just have a walkman and I'm listening to the radio  ;D

--- End quote ---

Paul B. Walker, Jr.:

--- Quote from: Stretchyman on April 19, 2016, 1433 UTC ---Now complete, i.e. Built & Tested with 6930KHZ Xtal (will pull down to 6925KHz).

Contact me direct for usual 'HFUnderground ONLY' Discount!

Have some Mod Tranny's wound too so can supply EVERYTHING!

Let me know what you need.

Stretchy.

eBay item number:

131595757554

--- End quote ---

Stretchyman,

I'd be interested in having one of these totally built for me. I have an antenna here, but just don't have a soldering iron and the time or patience in putting it together.

Please contact me by email, walkerbroadcasting@gmail.com

Paul

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