[Milsurplus] Unmodifying an AVA-126

[J. Forster]

> As received, the 0Z4 rectifier had been replaced with a 6X5. As the 0Z4 does
> not have a filament, pins 2 and possibly
> 7 were used as tie points for other components. These components were
> removed/relocated to feed primary voltage to the 6X5 filaments.
>

I am not familiar with this unit in particular, but it is possible this is an
'official' mod. In the Canadian WS 19 MK III  Power Supplya similar change was
made for arctic use. Seems the 0Z4 did not always work (it's a cold cathode
rectifier) at low temperatures, hence the change to a hot cathode rectifier in
arcticized units.

Good luck with it,
John