Homebrew Electrect Transmitter for Bakelite Handset 164. - UK Vintage Radio Repair and Restoration Discussion Forum

ThePillenwerfer · 26th Oct 2014, 4:07 pm

I recently posted about rebuilding old Number 16 transmitters with electrect microphones and have now been playing about incorporating the same design into Bakelite handsets.

I allowed a larger surround to the PCB so that it would fit inside the handset and held it in place by turning over the forked connector which would normally press against the back of a carbon transmitter after well insulating the ends.

The spit guard is made from some thin packing foam, which isn't dense enough to block sound. I also made a cardboard packer to stop the mouthpiece from rattling.

As well as the cost saving, this must have cost less than a pound, it saves removing any parts, other than the transmitter, so the original configuration can be easily restored if subsequently desired.

- Joe

26th Oct 2014, 4:07 pm	#1
ThePillenwerfer Octode Join Date: Mar 2011 Location: Sheffield, South Yorkshire, UK. Posts: 1,453	Homebrew Electrect Transmitter for Bakelite Handset 164. I recently posted about rebuilding old Number 16 transmitters with electrect microphones and have now been playing about incorporating the same design into Bakelite handsets. I allowed a larger surround to the PCB so that it would fit inside the handset and held it in place by turning over the forked connector which would normally press against the back of a carbon transmitter after well insulating the ends. The spit guard is made from some thin packing foam, which isn't dense enough to block sound. I also made a cardboard packer to stop the mouthpiece from rattling. As well as the cost saving, this must have cost less than a pound, it saves removing any parts, other than the transmitter, so the original configuration can be easily restored if subsequently desired. - Joe Attached Thumbnails __________________ "Experts are only good at one thing: explaining why something will not work!"