[ARC5] running ARC-5 receiever fillaments on AC.

[Bill Cromwell]

Hi,

I use battery power for both the heaters and the B+. At 90 volts DC on 
the B+ my radios draw about 15 mA. Your 25 mA B+ supply may be enough. I 
evolved to pure DC and avoid the AC power supplies because it gets rid 
of ALL the power line conducted crud. It won't help with atmospheric QRN 
or radiated junk from a neighbors naughty television but it helps with 
whats on the power line (because the power line isn't connected to it.

Somebody else commented about the stability with DC on the heaters. I 
found the same result. Pipe the audio into your computer sound card and 
run fldigi, spectran, or other software =with a "waterfall" display. The 
command receivers will produce a straight line down the waterfall frome 
stable received signals. That means the oscillators are not wobbling 
around varying  heater energy when we use regulated DC (or batteries).

73,

Bill  KU8H

On 08/26/2017 01:03 PM, J Mcvey via ARC5 wrote:
> Thanks, The reason I ask is that I an old home-brew receiver power
> supply that someone made.
>
> Now the next thing i discovered is that the transformer is probably
> under -powered.
> It's a stancor PS-8416 125-0-125 @ 25ma.
> The rectified voltage may be sufficient but the current is probably too
> light?
>
>
> On Saturday, August 26, 2017 12:27 PM, David Stinson
> <arc5 at ix.netcom.com> wrote:
>
>
>
>
> From: J Mcvey via ARC5
> Subject: [ARC5] running ARC-5 receiever fillaments on AC.
>
> What is the consensus on ac vs dc filament supplies for the receivers?
> Does it make a difference? Do they tend to get hum in output?
>
> -----------------------
>
> It has been my experience that AC filaments inevitably introduce some
> amount of hum, for various reasons.  YMMV, of course.
> Dave S.
>
>
>
>
>
>
> ______________________________________________________________
> ARC5 mailing list
> Home: http://mailman.qth.net/mailman/listinfo/arc5
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:ARC5 at mailman.qth.net <mailto:ARC5 at mailman.qth.net>
>
> This list hosted by: http://www.qsl.net <http://www.qsl.net/>
> Please help support this email list: http://www.qsl.net/donate.html
>
>
>
>
> <http://www.avg.com/email-signature?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail>
> 	Virus-free. www.avg.com
> <http://www.avg.com/email-signature?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail>
>
>
> <#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2>
>
>
> ______________________________________________________________
> ARC5 mailing list
> Home: http://mailman.qth.net/mailman/listinfo/arc5
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:ARC5 at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>

-- 
bark less - wag more