Lighting up an IV-15

[Paul Andrews]

Hi,

As bought some DM160 and IV-15 tubes a while back. It was difficult to find much information on either, but especially the IV-15 tubes. There is a partial translation of the Russian data sheet here on this group and I managed to find some more information at http://www.radiomuseum.org/tubes/tube_iv-15.html (which also has the only diagram I have been able to find of the pin outs. So I though I would present my own results for the IV-15 here (I have already done so for the DM160 separately).

Basically the IV-15 is pretty much a drop-in replacement for the DM160, except that the filament voltage and current should be 0.6V and 42mA respectively.

Controlling the brightness is also done by pulling the grid voltage -ve wrt to the filament, anything below around -3V will turn it off completely. 0V is full brightness.

The 'HV' for the anode can be anything from around 10V to 50V, which is slightly more lenient on the low end than the DM160. However, with only 10V on the anode, the filament will not be very bright and you won't really be able to control it with the grid because you will need to be pulling the filament voltage to about 0V (so pulling the grid lower is hard?).

Anyway, here is one setup that works - it is almost identical to my setup for the DM160, apart from the resistor values for the filament (the resistor values ideal rather than practical, approximations should be fine):

[Paul Andrews]

Here's a picture

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[Dylan Distasio]

Thanks, Paul!

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