Approx internal resistance of double rectifier diodes? - UK Vintage Radio Repair and Restoration Discussion Forum

Al (astral highway) · 5th Nov 2007, 7:51 pm

Just wondered if anyone has a feel for the approximate internal resistance of a typical double rectifier valve? (actually, I'm thinking specifically of VT80 and equivalents)

Thanks

Astral

Herald1360 · 5th Nov 2007, 9:02 pm

http://frank.pocnet.net/sheets/127/8/80.pdf

This data sheet states a tube voltage drop at 125mA per anode of 60V.

That suggests a resistance of 480 ohms per diode to me, unless I've misunderstood something fundamental.

Chris

Al (astral highway) · 5th Nov 2007, 11:01 pm

Thanks, Chris, that's a great help.

Cheers,

Astral.

5th Nov 2007, 7:51 pm	#1
Al (astral highway) Dekatron Join Date: Nov 2006 Location: London, UK. Posts: 3,496	Approx internal resistance of double rectifier diodes? Just wondered if anyone has a feel for the approximate internal resistance of a typical double rectifier valve? (actually, I'm thinking specifically of VT80 and equivalents) Thanks Astral __________________ Al

5th Nov 2007, 9:02 pm	#2
Herald1360 Dekatron Join Date: Feb 2007 Location: Leominster, Herefordshire, UK. Posts: 16,536	Re: ???anyone know approx internal resistance of double rectifier diodes??? http://frank.pocnet.net/sheets/127/8/80.pdf This data sheet states a tube voltage drop at 125mA per anode of 60V. That suggests a resistance of 480 ohms per diode to me, unless I've misunderstood something fundamental. Chris

5th Nov 2007, 11:01 pm	#3
Al (astral highway) Dekatron Join Date: Nov 2006 Location: London, UK. Posts: 3,496	Re: ???anyone know approx internal resistance of double rectifier diodes??? Thanks, Chris, that's a great help. Cheers, Astral. __________________ Al