HYTRON TUBE HY31Z DUAL TRIODE

[W2PFY]

I'm looking for the specifications on an old tube as noted above. I looked at all the tube sites, nothing found. Maybe someone has the data in an old hand book. I have four of these and it looks like they could make a cool OB rig. Any help would be appreciated.

Thanks in advance,  Terry
   

[W1EUJ]

6.3 Fil 2.5 Amps
500 V Max. Plate Voltage
150 mA Max. Plate Current
30mA Max. Grid Current
30W Max. Plate Dissipation
Mu of 45, each triode

Cgf 5pF, per section
Cpf 1.9, per section
Cgp 5.5, per section

Class C Telegraph B+: 500, -45V grid, 150mA plate current, 25mA grid current.
2.5W grid drive, 56W output typical

Class C Phone B+ 400, -45V grid, 150mA plate current, 30mA grid current. 3.5W grid drive. 45W output typical

Class B Audio B+ 500, 0V grid, 150mA plate current, 1.8W grid drive, 7000Ohm load impedance, 51W output typical

From RADIO Handbook, Eighth Edition, 1941.


In general, those 30's - 40's RADIO Handbooks used alot of Hytron and H&K tubes in their designs. I'll send you my copy if you need.


David Goncalves
W1EUJ

[W2PFY]

Neat O Dave, What is the resting current on class B service? I don't need a copy, I'll just save this page.

Thanks again & 73

Terry

[KE6DF]

Here is some data:

http://www.nj7p.org/Tube4.php?tube=HY31Z

Attached is a page from an old handbook with some more info.

[KE6DF]

This may not be of much use, but it's another result of some google archeology.

Here is a picture of a 1940's rig using an 828 final modulated by an HY31Z.

http://www.rigpix.com/mischam/subraco_75t.htm

[W1EUJ]

Sorry Terry, no additional info available.