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Kit - Pine Board Wireless Transmitter

Kit - Pine Board Wireless Transmitter image 1
Customer image:<br/>"Built on a slightly fancier cherry base."
Customer image:<br/>"tin can"
Customer image:<br/>"inside the tin can"
Customer image:<br/>"Philco 53-944 and tin can"
Customer image:<br/>"THELKO from germany"
Customer image:<br/>"-THELKO- from germany version1"
Customer image:<br/>"New bei -THELKO- from Germany"
Customer image:<br/>"Easy to assemble, took about an hour plus. Still tinkering with it to reduce a persistent hum. Also testing its range with various length antennas."
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Kit - Pine Board Wireless Transmitter image 1
Customer Images:
Customer image: "Built on a slightly fancier cherry base."Customer image: "tin can"Customer image: "inside the tin can"Customer image: "Philco 53-944 and tin can"Customer image: "THELKO from germany"Customer image: "-THELKO- from germany version1"Customer image: "New bei -THELKO- from Germany"Customer image: "Easy to assemble, took about an hour plus. Still tinkering with it to reduce a persistent hum. Also testing its range with various length antennas."
SKU: K-488
Item ID: 005336
Price: $64.95
In stock
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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 inch x 6.5 inch board. All parts and instructions included.

UPC/EAN: 609722133142

RoHS Compliant

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Specifications, Files, and Documents

Product Reviews

4.50 out of 5 based on 24 reviews


5 out of 5

Great kit worked first try. Added a tube preamp to it to use my mp3/ Bluetooth player to it. I use a 10 foot antenna and broadcast through out my home. Found the more modulation the longer range. Used my scope to set volume to just below clipping. Also checked for harmonics which were null to none.

- November 3rd, 2019
5 out of 5

Great project. The instructions were easy to follow. I put it together in a few hours. Everything was included.I would recommend this project.

- April 15th, 2019
4 out of 5

Went together easy and works pretty good. Should have had an on/off switch included, easy enough to add though. Will also benefit from adding extra antenna lead or a small whip.

- November 28th, 2018
5 out of 5

What simple audio pre-amp could I add to this?

- November 12th, 2018
5 out of 5

Fun project works great. figuring out what is the best antenna to use. any suggestions? Will probable make a box to put it in.

- May 26th, 2018
5 out of 5

This kit is amazing. I have done a bit of soldering in the past and can kinda sorta ;) read schematics.

I was able to put this kit together and plug it in and have it work - the first time (I was not expecting that for being such a novice). The directions were amazing! I added a headphone jack to it so I could more easily plug in mp3 players, etc. I can now use my ancient AM radios to listen to my mp3 player. Just so cool!

- June 17th, 2017
5 out of 5

After a long time I have again occupied with my k-488.
Rolf from Switzerland had wondered about the low power at the given 135v anode voltage.
This was also expressed by an American hobbyist in the "antique electronic supply forum", unfortunately there were no changes.
Rolf had then an anode voltage of 27v suggested, so the transmitter worked so synonymous.
The same I have also tried and I have come to the same result.
Comically only, the other Nachbauer with the 135v good results have reached.
I have now found that a much larger modulation is required for the 135v.
Nevertheless I will stay with the lower anode voltage, it works so satisfactorily.

- April 14th, 2017
5 out of 5

hi, ich heisse wolfgang(OPA.WOLLE oder -THELKO-)und komme aus deutschland.
ich habe diesen transmitter gebaut, leider kann ich das foto nicht hochladen.

- March 28th, 2017
5 out of 5

Pretty cool. I built my own enclosure for it and I fashioned a sheet metal shield to go around the tube and connect to ground. It helped me because I had a glass envelope tube with mine. It's got enough out put to listen around the house. I suggest wiring in a power switch. Mine didn't come with one.

- October 10th, 2016
5 out of 5

I put the kit together in a few hours. The instructions were very straight forward and easy to follow. Following what someone else mentioned their review, I also added a 220pF capacitor in parallel with C2 to bring the frequency down to about 625 kHz. I needed a bit more antenna to get a better signal, but I'm thrilled with the results!

- June 12th, 2016


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