[Boatanchors] 0Z4 Rectifier

[WA5CAB at cs.com]

The 19 Set supply would seem to be unique among military sets then.  All of 
the others that I can think of use either the Ratheon family of gas 
rectifiers (CK-1005, 1006 or 1007) and/or self-rectifying vibrators.

In a message dated 5/19/2010 11:01:11 PM Central Daylight Time, 
jfor at quik.com writes: 
> The Canadian WS 19 Mk. III used a vibrator power supply with a cold
> cathode rectifier. There is a special modification for when the set was
> used in arctic conditions that replaced the 0Z4 with a 6x4 (I think).
> 
> Best,
> 
> -John
> 
> ================
> 
> 
> >The high forward voltage required to fire no doubt explains why they were
> >only used in vibrator supplies.
> >
> >In a message dated 5/19/2010 9:04:28 PM Central Daylight Time, 
> al at ar88.net
> >writes:
> >>I had to dig to find any info at all on this subject.  Fred Terman in
> >>the 1943 edition of "The Radio Enginee's Handbooks" says, " Such
> >>rectifiers are used to a limited extent in connection with vibrator
> >>power supplies.  They have the advantageof needing no filament heating
> >>power, but require a relatively high voltage drop to start the flow of
> >>current, and introduce high-frequency transients."
> >>
> >>Checking the data sheet, one finds they need 300 volts to fire, and
> >>there is a requirement to maintain a 30 mA current flow.  I'm guessing
> >>they aren't particularly efficient when sine waves are applied, as they
> >>wouldn't fire until late in the cycle.
> >>
> >>BTW, a 6X5 or 6X4 rectifier only draws 450 mA for the heaters.
> >>
> >>Al
> >>
> >>On 5/19/2010 12:03 AM, mac wrote:
> >>>Saved a couple of amps of filament current.  Significant back in the
> >>>days of 6 volt electrical systems.
> >>>
> >>>Dennis D. W7QHO
> >>>Glendale, CA
> >>>
> >>>
> >>>
> >>>On May 18, 2010, at 9:41 AM, Jim Haynes wrote:
> >>>
> >>>
> >>>>I've wondered from time to time why the 0Z4 rectifier was used in,
> >>>>and used only in, automotive radios with vibrator power
> >>supplies.......
> >>

Robert & Susan Downs - Houston
wa5cab dot com (Web Store)
MVPA 9480