[ARC5] SCR-522: Receiver Surprises

[Glenn Little WB4UIV]

Can you run a gassy glass tube at reduced plate voltage and slightly 
increased filament voltage to get the getter to absorb more gas.
Here is a very good description of tube failure prevention:

  https://www.w8ji.com/vacuum_tubes_and_vaccum_tube_failures.htm

73
Glenn
WB4UIV

On 7/14/2018 7:33 AM, arc5 at ix.netcom.com wrote:
>
> Still got a couple of open bypasses to replace in the if, when I get 
> some time. But this old Warrior's receiver surprises me. It's doing 
> considerably better than specified sensitivity. About 1.5 microvolts, 
> which isn't bad for a 9003 RF amplifier. Easily enough to listen to 
> local traffic. Next step is to etch some crystals to get them on the 
> right frequency. Transmitter's putting out a little over four Watts. 
> I'm finding some 832 tubes- even New Old Stock ones are becoming 
> gassy. I put one in and keyed the transmitter and got a beautiful blue 
> glow until the tube exploded. I've never seen that happen before. 
> Should have tested it first I guess.
>
>
>
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-- 
-----------------------------------------------------------------------
Glenn Little                ARRL Technical Specialist   QCWA  LM 28417
Amateur Callsign:  WB4UIV            wb4uiv at arrl.net    AMSAT LM 2178
QTH:  Goose Creek, SC USA (EM92xx)  USSVI LM   NRA LM   SBE ARRL TAPR
"It is not the class of license that the Amateur holds but the class
of the Amateur that holds the license"

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