The Negatron - UK Vintage Radio Repair and Restoration Discussion Forum

ms660 · 21st Jun 2015, 11:22 am

Anyone know who made the negatron valve, two anodes and a "grid"

I'm aware of the Scott Taggart connection.

Lawrence.

Jeremy M0RVB · 21st Jun 2015, 3:47 pm

The only reference I can find is in Tyne which just says Scott-Taggart made the valve in around 1919, advertised in 1922 after he gained a patent. it does not say who he worked for at the time.

Jeremy

ms660 · 21st Jun 2015, 4:09 pm

Yes, not too much info on the web, Radio Communication Co used a negatron in some of their marine communications equipment, they were apparently backers to Mullard.

Lawrence.

Jeremy M0RVB · 21st Jun 2015, 4:53 pm

Ah - Scott-Taggart was a research engineer and later consultant at the Radio Communication Co and he worked for Ediswan before that.

This (http://www.radiomuseum.org/tubes/tube_negatron.html) suggests his own company ST Co. Ltd. but Tyne says that didn't exist until 1926.

Jeremy

G6Tanuki · 21st Jun 2015, 5:56 pm

These were often called the "Polar Negatron" and are mentioned in John W Stokes's book "70 Years of Radio Tubes and Valves: A Guide for Electronic Engineers, Historians and Collectors"

emeritus · 21st Jun 2015, 8:38 pm

Here's a copy of the Negatron patent.

turretslug · 21st Jun 2015, 8:55 pm

This sounds like a similar principle of operation to gammatron mode- perhaps the different names were to avoid focus on patent implications?

ms660 · 21st Jun 2015, 8:58 pm

Quote:

Originally Posted by emeritus

Here's a copy of the Negatron patent.

Thanks for that

Lawrence.

21st Jun 2015, 11:22 am	#1
ms660 Dekatron Join Date: Apr 2011 Location: Cornwall, UK. Posts: 13,454	The Negatron Anyone know who made the negatron valve, two anodes and a "grid" I'm aware of the Scott Taggart connection. Lawrence.

21st Jun 2015, 3:47 pm	#2
Jeremy M0RVB Hexode Join Date: Jul 2003 Location: Leeds, West Yorkshire, UK. Posts: 458	Re: The Negatron The only reference I can find is in Tyne which just says Scott-Taggart made the valve in around 1919, advertised in 1922 after he gained a patent. it does not say who he worked for at the time. Jeremy

21st Jun 2015, 4:09 pm	#3
ms660 Dekatron Join Date: Apr 2011 Location: Cornwall, UK. Posts: 13,454	Re: The Negatron Yes, not too much info on the web, Radio Communication Co used a negatron in some of their marine communications equipment, they were apparently backers to Mullard. Lawrence.

21st Jun 2015, 4:53 pm	#4
Jeremy M0RVB Hexode Join Date: Jul 2003 Location: Leeds, West Yorkshire, UK. Posts: 458	Re: The Negatron Ah - Scott-Taggart was a research engineer and later consultant at the Radio Communication Co and he worked for Ediswan before that. This (http://www.radiomuseum.org/tubes/tube_negatron.html) suggests his own company ST Co. Ltd. but Tyne says that didn't exist until 1926. Jeremy

21st Jun 2015, 5:56 pm	#5
G6Tanuki Dekatron Join Date: Apr 2012 Location: Wiltshire, UK. Posts: 13,998	Re: The Negatron These were often called the "Polar Negatron" and are mentioned in John W Stokes's book "70 Years of Radio Tubes and Valves: A Guide for Electronic Engineers, Historians and Collectors"

21st Jun 2015, 8:55 pm	#7
turretslug Dekatron Join Date: Nov 2011 Location: Surrey, UK. Posts: 4,395	Re: The Negatron This sounds like a similar principle of operation to gammatron mode- perhaps the different names were to avoid focus on patent implications?