Re: [Amps] WD7S lack of HV circuit ?

[Bill Weinel <tube.radio@gmail.com>]

HV multiplier board voltage sense pick off:
https://web.archive.org/web/20170326145816/http://home.earthlink.net/~wd7s/HV-2.pdf 

HV voltage sense detector schematic on page 20 of 28:
https://web.archive.org/web/20171011082141/http://home.earthlink.net/~wd7s/TRIDOC.PDF 

73 Bill W4WHW


On 6/2/24 09:12, Aleksandar Petkovic via Amps wrote:
> Thanks. I found that wayback site but could not make head or tail of 
> it. Even after watching the how to video. It made no sense to me.
> I eventually found WD7S stuff but when I clicked on the particular 
> links in the list, it brought up a calendar showing how many times it 
> has been captured. Pretty meaningles and of no use.
> I gave up on it and accepted that I'm just too dumb.🙂
>
> 73, Alek VK6APK.
>
>
> On 2/06/2024 7:55 pm, Bill Weinel wrote:
> > All of this information is still available online from the Internet 
> > Archive Wayback machine.
> > 73 Bill W4WHW
> >
> > On 6/2/24 04:51, Ulf (SM0NOR) wrote:
> > > Is it the "WD7S PRODUCTIONS HIGH VOLTAGE POWER SUPPLY BOARD HV-2" 
> > > you are looking for?
> > > I have the pdf. I managed to download most of the stuff by 
> > > wayback-machine a few years ago.
> > > 73 - SM0NOR
> > > ________________________________
> > > Från: Amps<amps-bounces@contesting.com>  för 
> > > jim.thomjim.thom@telus.net  <jim.thom@telus.net>
> > > Skickat: den 31 maj 2024 15:58
> > > Till:amps@contesting.com  <amps@contesting.com>
> > > Ämne: [Amps] WD7S lack of HV circuit ?
> > >
> > > WD7S, on one of his boards he sold, was made to shut things down in the
> > > event of loss of B+.
> > > If I remember correctly, it resembled a mess of series resistors, 
> > > like you
> > > would use to meter HV, (without the meter), and an extra smaller value
> > > resistor, in series at the cold end.  The V drop across the small value
> > > resistor was like 5-7 vdc.... and was applied to the rest of the 
> > > circuit.
> > > When the B+ dropped below a given threshold, the circuit tripped, and
> > > kicked the amp offline...like opening off the keyline etc.  I think 
> > > it used
> > > a spt, or dpdy mech relay..that was always operated, with B+ turned 
> > > on.  I
> > > think the coil was opened off when the circuit tripped.
> > >
> > > I can't find the original schematic for this board anywhere.
> > > Does anybody have any info on it ?
> > >
> > > Jim  VE7RF
> > > _______________________________________________
> > _______________________________________________
> > Amps mailing list
> > Amps@contesting.com
> > http://lists.contesting.com/mailman/listinfo/amps
> _______________________________________________
> Amps mailing list
> Amps@contesting.com
> http://lists.contesting.com/mailman/listinfo/amps

_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps