[Top] [All Lists]

[Amps] Amp Warm-up??

To: <>
Subject: [Amps] Amp Warm-up??
From: "Jim Thomson" <>
Date: Tue, 10 Apr 2018 11:47:56 -0700
List-post: <>
Date: Sun, 8 Apr 2018 20:14:31 +0000
From: Bill Turner <>
To: Amps group <>
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 instant on. 
  I would still refer to a  2-5 second warm 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 
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 
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    
Amps mailing list

<Prev in Thread] Current Thread [Next in Thread>