EZ80/81 for low voltage application

[sumotan]

Hi Guys,
Was wondering what's the minimum voltage that's specified for this rectifier to function properly ?

Thanks

 

[JonSnell Electronic]

Look at the forward voltage drop and then anything above it is rectified.
EZ81 drops about 47volts.

 

[sumotan]

Thank you kindly Jon

 

[DF96]

There isn't a minimum voltage for a valve rectifier; the hot cathode could mean a tiny forward current at zero voltage.

An EZ81 with 10V across it might carry 60mA, according to a graph in the Philips datasheet. Why do you think this is a suitable rectifier for a low voltage supply?

 

[sumotan]

Not why DF 96, just so happen that I have a couple in my collection hence. What other rectifiers do you recommend that is more suitable that provides around 100 ma of current ?

Thks

 

[PRR]

..An EZ81 with 10V across it might carry 60mA,...

Per Anode.

So both anodes "can" do 100mA with less than 10V drop.

I have no idea what "low voltage" is. 75V? 12V? 3.3V? EZ81 will clearly be suitable for a 75V supply, will be poor for a 3.3V supply. But IF the 3.3V pulls a very steady current, and you don't mind feeding >13V and seeing 80% of that go off as heat, it will work.

Long ago we charged 6V-48V car battery strings with 110V AC through a bottled rectifier. HUGE waste heat, but still the best alternative. (A motor-generator would be less heat but much higher initial cost.)

 

[sumotan]

Aaaah you know where I heading towards PRR. Lol
Years ago I build a SOZ preamp curiousity got the best of me so I actually experimented with a parallel pair of 6x4 with choke input to help not only regulation but also bring down the voltage. Now I thinking of testing it out again but looking to load it down to around 10 & 18v or so.

Thanks