[ARC5] SCR-183/-283 4-5 MC Coil on 75 MTRs

[WA5CAB--- via ARC5]

I have several hundred 1626's but the only time anyone has ever asked for 
one was because it was missing.  I don't think I've ever seen a bad one 
unless the envelope had been smashed.  Which would indicate that they weren't a 
compromise limited-lifetime design.

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

In a message dated 07/09/2014 11:40:03 AM Central Daylight Time, 
ianmwilson73 at gmail.com writes: 
> Tube Lore doesn't give any history although it mentions the SD838
> as a variant. This was a Sylvania 'developmental type' - loktal, 25V
> 130mA heater.
> 
> 73, ian K3IMW
> 
> 
> 
> On Wed, Jul 9, 2014 at 8:19 AM, Geoff <geoffrey at jeremy.mv.com> wrote:
> 
> >Ive heard it said that the 1626 is a souped up 6J5G with increased
> >emission to get the gm up and a new plate structure.
> >
> >Any idea how long they run that way? One trick was to run a filament at
> >higher voltage and not worry about short life in wartime. No, Im not 
> saying
> >they used a 6.3V filament but something under 12.6V that cost less and 
> used
> >less critical material.
> >
> >Carl