HT Delay Switch

[GRe]

Posted on a.b.s.e a schematic to delay B+ after power on.
Something different as it is (almost throughout) hollow state.

Now, who's the purist to eliminate the last bit of upgraded
sand (D1) without compromising the circuit's functionality?

Regards,
Gio

[GRe]

"Patrick Turner" > wrote in message
...
On Feb 20, 8:40 pm, "GRe" > wrote:
>> Posted on a.b.s.e a schematic to delay B+ after power on.
>> Something different as it is (almost throughout) hollow state.
>>
>> Now, who's the purist to eliminate the last bit of upgraded
>> sand (D1) without compromising the circuit's functionality?
>>
>> Regards,
>> Gio
>
[...]

>So for one reason or 100 others, I cannot view a.b.s.e

[...]

Here's another link:
http://www.radioconstructors.info/gaf2/0370rcsimpleht/page1.jpg
http://www.radioconstructors.info/gaf2/0370rcsimpleht/page2.jpg
http://www.radioconstructors.info/gaf2/0370rcsimpleht/page3.jpg

Regards,
Gio

[Patrick Turner]

On Feb 21, 11:38*pm, "GRe" > wrote:
> "Patrick Turner" > wrote in message
>
> ...
> On Feb 20, 8:40 pm, "GRe" > wrote:>> Posted on a.b.s.e a schematic to delay B+ after power on.
> >> Something different as it is (almost throughout) hollow state.
>
> >> Now, who's the purist to eliminate the last bit of upgraded
> >> sand (D1) without compromising the circuit's functionality?
>
> >> Regards,
> >> Gio
>
> [...]
>
> >So for one reason or 100 others, I cannot view a.b.s.e
>
> [...]
>
> Here's another link:http://www.radioconstructors.info/gaf2/0370rcsimpleht/page1.jpghttp://www.radioconstructors.info/gaf2/0370rcsimpleht/page2.jpghttp://www.radioconstructors.info/gaf2/0370rcsimpleht/page3.jpg
>
> Regards,
> Gio

For those who might like to use a TV diode to operate some sort of
delayed B+ turn on the 1970 magazine article in the links might be
pleasing.

The operation of the circuit shown in the schematic is not clear from
just reading the schematic and the authors didn't undestand that
people in 2011 prefer to look at a schematic and see straight away how
it works without having to wade through a lengthy and obtuse article
about how it works.

But I much prefer to avoid any use of vacuum tubes in power supplies
and just use simple solid state devices and a simple ordinary 12V
relay or two which can all still be purchased easily and cheaply as
discrete parts from Radio Shack, Mouser, Maplin, Dick Smith, Jaycar,
etc.

Patrick Turner.