I'm curious about schematics for small battery transceivers or battery tube transmitters...

I can't find much along the lines of transmitters using these little tubes and I know they made little walkie talkies but can't find any schematics. Got anything I could play with?

Hi Kyle,
Battery tube transceivers have long fascinated me. Years ago I had a 3-tube (all 3A5s) walkie talkie. It was a kit offered by Springfield Enterprises. The telephone handset on top made it really look neat. I was hooked the moment I saw it. Wish I still had it. There are several circuits floating around. What frequency range are you interested in? Here is a link to the famous BC-611 WWII walkie talkie. Most were on 3885 AM and many show up at the Dayton Hamvention each year, still communicating with each other on this popular 75 meter AM frequency.

http://www.militaryitems.com/product.ph ... 1&featured

Whether code or voice, it would be a lot of fun to build one. Good luck with your battery tube adventure. Craig

I've thought of taking something like the AM transmitter design using the 6SA7(http://www.electronixandmore.com/project/10.html) and seeing what it does with a 1R5 and 1S4(as an audio amplifier) instead.

1R5 is rated to only 135mW of power but the maximum legal is 100mW right? Or is that power from the antenna, something 135mW will never produce.

Kyle,
So it's Part 15 you're looking for. Here is a link to a battery tube phono oscillator that may do the trick. If you get it working, let me know. CB

http://books.google.com/books?id=9tYDAA ... or&f=false

Part 15 is probably a good start on building things that the FCC may take some small exceptions too, and easy to verify results with as well.

Public frequency builds would of course be a good next step. Kyle are you working on getting your license? I think I heard a rumor you have an understanding and supportive lady in your life, now would be a good time to enlist a night time study partner

Yes, working on the license.

And not much studying gets done when the sun goes down... lol

Gonna prototype this one out and see what she does. Worst case it just needs an RF amp after the 1R5.