The transmitter: R.E. Fenn (GEC-Marconi communications) - UK Vintage Radio Repair and Restoration Discussion Forum

Lee de Forest · 27th Mar 2010, 10:23 am

This article outlines the major developments which have taken place in sound transmitter equipment and techniques - from the first experiments before the thermionic valve, up to the present time.
http://www.ebu.ch/en/technical/trev/trev_263-fenn.pdf

Aub · 28th Mar 2010, 2:55 pm

Thanks for posting this. Very interesting!

Cheers

Aub

Boom · 28th Mar 2010, 5:50 pm

'filament generators of 30-40 volts at 2000 amps were typical'

80,000 Watts just to keep the heaters alight. WOW!

Fascinating item.

Dave

27th Mar 2010, 10:23 am	#1
Lee de Forest Retired Dormant Member Join Date: Sep 2008 Location: Harrogate, North Yorkshire, UK. Posts: 352	The transmitter: R.E. Fenn (GEC-Marconi communications) This article outlines the major developments which have taken place in sound transmitter equipment and techniques - from the first experiments before the thermionic valve, up to the present time. http://www.ebu.ch/en/technical/trev/trev_263-fenn.pdf

28th Mar 2010, 2:55 pm	#2
Aub Nonode Join Date: Mar 2005 Location: Nuneaton, Warwickshire, UK. Posts: 2,221	Re: The transmitter: R.E. Fenn (GEC-Marconi communications) Thanks for posting this. Very interesting! Cheers Aub __________________ Life's a long song, but the tune ends too soon for us all - Ian Anderson, 1971.

28th Mar 2010, 5:50 pm	#3
Boom Retired Dormant Member Join Date: Jan 2007 Location: Westbury, Wiltshire, UK. Posts: 2,451	Re: The transmitter: R.E. Fenn (GEC-Marconi communications) 'filament generators of 30-40 volts at 2000 amps were typical' 80,000 Watts just to keep the heaters alight. WOW! Fascinating item. Dave