[Amps] WD7S lack of HV circuit ?

[Bill Weinel]

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 at contesting.com>  för 
>>> jim.thomjim.thom at telus.net  <jim.thom at telus.net>
>>> Skickat: den 31 maj 2024 15:58
>>> Till:amps at contesting.com  <amps at 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
>>> _______________________________________________
>>>
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