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[AMPS] Re: 31LQ6 warmup

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Subject: [AMPS] Re: 31LQ6 warmup
From: nospam4me@juno.com (nospam4me@juno.com)
Date: Tue, 16 May 2000 22:48:02 -0700

Hi Alek, 
Marv is right, my spec sheet for that tube (RCA Brand) states the warmup
as 11 seconds min.  Typical 
of sweep tubes.  Be sure to go over to my  http://sonic.ucdavis.edu 
server and down load my Dentron 
Cathode current cutoff mod for the Dentron.  Save your tubes.   There are
two Dentron Download available 
on the site, one is a copy of an old Ham Radio Mag article, the second is
my work up with the circuit 
diagram. 
cheers
skipp

> On Mon, 01 May 2000 17:54:45 +0800 Alek Petkovic
<vk6apk@eon.net.au>writes:
>G'day from "Down Under.
>I've just ordered 2 sets of 4 x 31LQ6 tubes for my little Dentron
GLA-1000 
>amp. These will replace the tired 6LQ6 tubes presently in the unit.
>The tube swap will of course necessitate an extra transformer to run the
>heaters of the new tubes.
>
>Does anybody on the reflector have an idea of the current drawn by the 
>heaters in these tubes?
>... so I figure on around 2A total for the four tubes in parallel. 
>I have a transformer rated at 100VA which I hope will do the job with a 
>generous safety margin. 
>Am I correct in the above assumption?

:Hi Alek,
:Yes, that's the way it works -- should be right around 500 mA per
:tube.  The 31's also have a "controlled" warm-up time which was a
:requirement for their original application in series filament string
:style TV's.
:73, Marv  WC6W  310 649 3111














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________________________________________________________________
YOU'RE PAYING TOO MUCH FOR THE INTERNET!
Juno now offers FREE Internet Access!
Try it today - there's no risk!  For your FREE software, visit:
http://dl.www.juno.com/get/tagj.

--
FAQ on WWW:               http://www.contesting.com/ampsfaq.html
Submissions:              amps@contesting.com
Administrative requests:  amps-REQUEST@contesting.com
Problems:                 owner-amps@contesting.com
Search:                   http://www.contesting.com/km9p/search.htm


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