[Amps] WD7S lack of HV circuit ?

[Aleksandar Petkovic]

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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