The ingenious Fullerphone

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While digging through some boxes that were in deep storage I found my Fullerphone and Fieldphone F.  One of my eclectic areas of collecting is communications so allow me to share some pics and info regarding the Fullerphone.  The Fullerphone was the first untappable communication systems (when using Morse) due to its incredible ability to work at currents as low as half a microamp!    You could use a pair of conductors or the earth as the return but rather than bore everyone with a bunch of technical jargon such as Buzzer/Chopper, choke coils, and dual reversed rectifiers I'll post a link to the excellent wireless for the Warrior website so you can read further if so inclined.
https://www.wftw.nl/fullerwi.pdf

https://www.wftw.nl/Signal%20Training%20Vol.III,%20No.%2021.pdf

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Sapper740 Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: July 15 2021 Location: Texas Status: Offline Points: 1737	Post Options Post Reply Quote Sapper740 Report Post Thanks(0) Quote Reply Topic: The ingenious Fullerphone Posted: March 12 2026 at 1:42pm
	While digging through some boxes that were in deep storage I found my Fullerphone and Fieldphone F. One of my eclectic areas of collecting is communications so allow me to share some pics and info regarding the Fullerphone. The Fullerphone was the first untappable communication systems (when using Morse) due to its incredible ability to work at currents as low as half a microamp! You could use a pair of conductors or the earth as the return but rather than bore everyone with a bunch of technical jargon such as Buzzer/Chopper, choke coils, and dual reversed rectifiers I'll post a link to the excellent wireless for the Warrior website so you can read further if so inclined. https://www.wftw.nl/fullerwi.pdf https://www.wftw.nl/Signal%20Training%20Vol.III,%20No.%2021.pdf

paddyofurniture Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: December 26 2011 Location: NC Status: Offline Points: 7942	Post Options Post Reply Quote paddyofurniture Report Post Thanks(0) Quote Reply Posted: March 12 2026 at 2:40pm
	wow! That is so cool. I tip my hat to you.

Canuck Members Profile Send Private Message Find Members Posts Add to Buddy List Special Member Donating Member Joined: January 17 2012 Location: Cochrane, AB Status: Offline Points: 4021	Post Options Post Reply Quote Canuck Report Post Thanks(0) Quote Reply Posted: March 12 2026 at 3:06pm
	Indeed a very cool i tem! I will look into those links to educte myself.
	Castles made of sand slip into the sea.....eventually

A square 10 Members Profile Send Private Message Find Members Posts Add to Buddy List Special Member Donating Member Joined: December 12 2006 Location: MN , USA Status: Online Points: 16998	Post Options Post Reply Quote A square 10 Report Post Thanks(0) Quote Reply Posted: March 12 2026 at 6:40pm
	i will as well , interesting pieces of history ,

Zed Members Profile Send Private Message Find Members Posts Add to Buddy List Special Member Donating Member Joined: May 01 2012 Location: France Status: Offline Points: 6460	Post Options Post Reply Quote Zed Report Post Thanks(0) Quote Reply Posted: March 13 2026 at 3:48am
	Technology always makes huge strides in wartime! That's a cool piece of kit.
	It's nice to be important, but it's more important to be nice!

A square 10 Members Profile Send Private Message Find Members Posts Add to Buddy List Special Member Donating Member Joined: December 12 2006 Location: MN , USA Status: Online Points: 16998	Post Options Post Reply Quote A square 10 Report Post Thanks(0) Quote Reply Posted: March 13 2026 at 9:04pm
	i agree , that and space exploration , bit more peaceful approach

Sapper740 Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: July 15 2021 Location: Texas Status: Offline Points: 1737	Post Options Post Reply Quote Sapper740 Report Post Thanks(0) Quote Reply Posted: March 14 2026 at 4:39am
	A few more pics:

Sapper740 Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: July 15 2021 Location: Texas Status: Offline Points: 1737	Post Options Post Reply Quote Sapper740 Report Post Thanks(0) Quote Reply Posted: March 14 2026 at 4:41am
	another: