[Milsurplus] [ARC5] Cool New DC-DC Converter

[Michael Bittner]

Right on, Mike.  I could use it right now for my farm radios, portables and LF beacon receivers that use 1.4-Volt filament tubes and typically require A batteries of 1.5 V for parallel filaments or, 7.5 V or 9 V for series string filaments.

However, my dream B+ power supply for these sets would run off of a rechargeable 2-Volt gel cell.  
Mike, W6MAB

  ----- Original Message ----- 
  From: Michael Hanz 
  To: D C _Mac_ Macdonald ; David Stinson 
  Cc: ARC-5 ; milsurplus at mailman.qth.net 
  Sent: Thursday, March 15, 2018 6:55 AM
  Subject: Re: [Milsurplus] [ARC5] Cool New DC-DC Converter


  I assume as a supply for battery sets that require both A and B batteries, Mac.

   - Mike  KC4TOS


  On 3/15/2018 9:44 AM, D C _Mac_ Macdonald wrote:

    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




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    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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