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872A valve diode tubes


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From:  gweaver [SMTP:gweaver-at-earthlink-dot-net]
Sent:  Sunday, August 09, 1998 12:28 AM
To:  Tesla List
Subject:  872A valve diode tubes 

I have 2 tubes, NEW, still in the box.

872A, Rated 10,000. volts, 1.25 amps each.

Will these work for your project?

I bought these about 3 years ago and never used them.  If your interested I
will take $50.00 for both of them.

gweaver-at-earthlink-dot-net

Gary


 
>> > Subject: valve diode tubes ?
>> >
>> > I'm after a diode or valve that will handle 240 watts min, thats at 8Kv -at-30
>> > ma.  This must be the minimum spec.
>> >
>> > Does anyone know of a supplier for them or how much they cost or anything
>> > really ?
>> 
>> http://www.schuricht.de/
>> schuhome?pWkorbId=115722938474215&pMainWin=cat&pOpt=2
>> 
>> Has some HV rectifiers. 866 (10kV 250mA) is 49DEM = 30USD, new.
>> 
>> That is the only European supplier of HV rectifier tubes with web catalog
>> I know of. I have HV diodes from old X-ray equipment that I can swap for
>> other things if interested.
>> 
>> http://www.falls.igs-dot-net/~testequipment/tubes.html
>> has a large list and is in Canada.. They list:
>> 866 ONS: $16.50 PULLS: $5.50
>> 
>> Anyone with specs for 8020 (40kV 100mA vacuum rectifier)????
>
>>From Richardson Electronics web page (http://www.rell-dot-com/)
>
>     Specifications
>
>      Anode Cap                                C1-5
>      Average Anode Current (A)                0.1
>      Base                                     A4-10
>      Dimensions Diameter (in) Maximum         2.312
>      Dimensions Inches Rigid Length Maximum   8
>      Filament Current (A)                     6.5
>      Filament Voltage (V)                     5
>      Gas Filling                              Vacuum
>      Maximum Rating, Average Anode (A)         0.1
>      Maximum Rating, Peak Anode (A)            1.5
>      Maximum Rating, Peak Inverse (V)          40,000
>      Peak Anode Current (A)                    1.5
>      Peak Inverse (V)                          40,000
>
> I seem to recall that the forward voltage drop is something like 150
>Volts  The tube is available from Richardson Electronics around here
>(Los Angeles area), they can fax you a data sheet for the 8020 or 8020A.
>(8020AX is $125 new, last time I checked)
>
>Newark Electronics has the 8020W (from Richardson) at $450+
>
>
>