Date: Sun, 8 Apr 2018 20:14:31 +0000
From: Bill Turner <dezrat@outlook.com>
To: Amps group <amps@contesting.com>
Subject: Re: [Amps] Amp Warm-up??
<On Sun, 8 Apr 2018 10:12:28 -0700, K7RDX wrote:
>
>Instant on tubes require no such treatment
<REPLY There is no such thing as an "instant-on" tube except for some
<cold-cathode types which have no filament or heater at all.
<Even a 3-500Z needs a few seconds.
<73, Bill W6WRT
### Most folks would use the term.... instant on..as....almost instant on.
I would still refer to a 2-5 second warm up...as.... instant on. Heck, even
Eimac et all, refers to directly heated cathodes as.... instant on.
## The OP has an Ameritron AL-80B... which uses a single 3-500Z. It already
has a step start for the B+..which also step starts the filament . After
the step start
has completed its cycle, its ready to go, including the directly heated
cathode.
I would still wait a few more seconds before hammering it with drive, but
thats just me.
Im in no rush. Hit the switch on the amp, turn on the xcvr, lights in shack,
heat , air
conditioning, tweak log books, find a pen or pencil, turn on some other
gear, turn on
geochron clock, fill coffee mug, use the washroom, etc, etc. Adjust chair,
tune around,
figure out what band I want to be on, what mode, what freq. By that time the
directly
heated cathode has had ample time to stabilize.
## IE, turn on the amp 1st.... then do everything else. If ur in a rush,
2-5 secs is ample.
Jim VE7RF
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