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Kit - Wireless Transmitter

Now your antique radio can play some of the same programs it did when it was new! With your cassette tape player, phonograph or high output microphone, this one tube transmitter becomes a miniature AM broadcasting station, patterned after the 1939 Zenith model S-7000 Wireless Record Player. Assemble on a 4 x 6 ½ breadboardall parts and instructions included. 2 lbs.

UPC/EAN: 609722133142

RoHS Compliant

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Product Reviews

4.21 out of 5 based on 14 reviews



Another fun kit. I have this hooked to a small preamp that runs off either a computer audio out, a CD player, or an MP3 player, but most of the time, I play old radio shows that are broadcast online. These are the real deal, replays of shows from the golden age of radio. Badge 714, predecessor to Dragnet, Gunsmoke, the radio show, The Shadow, and stuff like that. Amos & Andy could be considered racist & not PC these days. I can also play old Lindeyhop Jazz, Big Band or old Gand Ol' Opry. Easy fun little kit, and my programming can be contemporary with the age of the radios! Let's face it, Queen La Tifa don't belong on a Collins farm radio, or a Philco cathedral set! Ernest Tubb?, or The Monroe Brothers? Duke Ellington? Cab Calloway? Scott Joplin? That's different! That's the good stuff, especially those old black jazz & ragtime masters of musical magic! - May 4th, 2016

I bought this kit some time ago. I hooked it up to the tape output of my stereo receiver. I was able to play records, my iPod or whatever I wanted. The tape output was a perfect gain level to drive this thing

biglongpontiac - April 22nd, 2016

It's easy to assemble, but would be better if it had a pre-amp too.

Dale Huff - March 28th, 2016

Received my kit today really happy.
Opened the box checked off all the parts etc all there and accounted for, Oh by the way really nice packaging 10 out of 10 for that.
Any way had the kit up and running within a couple hours and it works really well.
I had to use a step down transformer until I source a 240 volt equivalent as power here is 240V but all went well.
I used a long Ariel wire just laid on the floor for now as where I live no neighbors for a long way and NO radio stations so no one to worry.
It actually worked with no Ariel but I wanted to hear it up the shed.
The Instructions where alright and easy to follow.
This was my first valve type build so rather happy it fired up first go.
Any way thanks to Antique Elec for having such a neat little kit which I was lucky enough to find.
The only down side to buying from the US is the postage cost, maybe something to look at in the future for all your international buyers which I am sure you have.
Kit difficulty is not that hard.
Quality of kit is good.(would have liked to see a glass version of the 12SA7, the nice red glow)
I'M happy and I guess that's all that matters.
Thank you

Bruclater - March 7th, 2016

Nice kit. Quality parts. Built it in a couple of hours. Fun new toy to transmit stuff from the internet through my old radios. Works well with 1940s superhet and AK TRF radios. Like one of the other guys says adding a longer wire 12" antenna wire makes a big difference. Gave it much more reach.

Anonymous - February 10th, 2016

Simple to build works great. I would like the option to order it with a glass tube

Anonymous - October 19th, 2015

Great kit. Very easy to put together and works great. It's fun being your own DJ and listening to your own selections on those wonderful vintage radios!

RWE - April 30th, 2015

Was easy to build but really should come with an Audio amplifier circuit so you could connect it directly to a line output source. I used a 70 volt line transformer backwards to connect the transmitter to one of the speaker outputs on my shop Stereo Receiver for an audio source. after some tweeking it works fine.

David DeRosier - April 30th, 2015

Ok after much testing and trial and error.. I believe I figured it out. And found 3 things that are key. 1. You need a good ground. 2. A longer antenna than stated. And 3. Unless you are using a high level input you need a preamp for use with a cd or mp3 player,. Etc... after I changed those 3 things, the kit is awesome! Great range, sound quality and volume. Now I am totally impressed . Glad I didnt give up on it

cox315 - April 24th, 2015

Loved building this and using it in school with my students to teach radio principles.

It is tricky to tune and would not work with my digital AM radio that only tunes multiples of 10 KHz. Worked fine with an old radio that had a real tuner. I generally use it with a little jumper clipped to the antenna lead as an antenna.

Also, as built, it played in a busy part of the AM broadcast spectrum. So I added a 220pf ceramic disc in parallel with C2 to push the carrier down spectrum to what was for me a quieter part of the band.

ALSO, you need to look up the spec on the P-C70-OSC to find its inductance, but the specsheet gives the pinout as if looking up, rather than as looking down (this made analyzing the circuit confusing until I figured that out)

As a final note, the schematic download here is much better for understanding than the schematic that comes in the instruction (plus the coil illustration makes more sense)

Thanks for such a fun and instructive kit!

Estraven - April 20th, 2015


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