[ARC5] Cool New DC-DC Converter

[D C _Mac_ Macdonald]

If you already have the 12VDC, why would you even be concerned about using the low voltage output?  I assume (yeah, I know) that one might be considering changing command set receivers to 12V filaments, but don't know why you would want to have regulated filament voltage except maybe for the local oscillator/mixer.

73 de Mac, K2GKK/5
(Since 30 Nov '53)
Oklahoma City, OK
USAF Retired 61-81
FAA Retired 94-10


________________________________
From: arc5-bounces at mailman.qth.net <arc5-bounces at mailman.qth.net> on behalf of Peter Gottlieb <kb2vtl at gmail.com>
Sent: Thursday, March 15, 2018 08:34
To: David Stinson
Cc: ARC-5; milsurplus at mailman.qth.net
Subject: Re: [ARC5] Cool New DC-DC Converter

Sounds useful. Question:  how much more current does a tube filament take when cold?


Peter

> On Mar 15, 2018, at 8:37 AM, David Stinson <arc5 at ix.netcom.com> wrote:
>
> This DC-DC converter looks really interesting.  It
> inputs 12V and can source a regulated from 1.25V
> to 12V at 3A for filaments and regulated 150V to
> 420V at up to 60mA for B+.  Gonna get me one of
> these.
> https://eur03.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.ebay.com%2Fitm%2F173034019336&data=02%7C01%7C%7C9450b4624bca42f4892d08d58a7988e3%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636567176942236244&sdata=UIr0oP1%2BuK5czkkVQd1eSPEvvaLocFUPJqZdItiEl%2Fc%3D&reserved=0
>
> 73 Dave AB5S

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