Re: Warm start options

On Thu, 29 Sep 2005 10:46:46 +0300, "Iain M Churches"
<tael@xxxxxxxxxxx> wrote:

>I did not go into detail, but it is wired just as you describe,
>and operates a power relay. The thermal relay switches off
>after the delay time has been reached. That should ensure
>that it lasts for many years. I did find though in the case of the
>DLS 16 that they vary enormously. So I had to pick and match
>and vary the voltage across the heater to get a pair (one each
>channel psu) that would switch at almost the same time.

If I'm following you correctly, you're operating *after*
the power transformer's secondary. You might really
enjoy the freedom of design you'd get from separate
filament and HV power transformers.

I know; I know; "I'm not worthy" you say. BZZZT.
Yes you are. Live now. Life's short.

>> Also, a two pole relay allows you to force a
>> restart "from cold", by turning off the delay relay's
>> heater, which matters if voltage soaring or similar is
>> an issue.
>
>That is one reason why I liked the idea of switching the
>bias, as it is low voltage with minimal current.

I'm just not convinced that this *does anything*
useful or important. And has the serious disadvantage
of lacking a silent startup that comes free by *not*
doing it.

But that's just me. Good fortune, and Big Fun,

Chris Hornbeck
"I did it because he lied, 'cause he took you for a ride,
because time was on his side, and because...
I want you" -Dylan
.

Relevant Pages

  • Re: Power line indicator
    ... First of all take the case of if the power ison, ... another box that will hold a relay to switch it automatically? ... gone it switches over. ... to get fancy and the generator has electric start the whole thing can ...
    (sci.electronics.repair)
  • Re: IR mains switch
    ... USB Net Power 8800 Single Outlet Network AC Power Controller - ... OTOH, switches may be. ... The device would be powered directly from the mains. ... Whether it passes through that mains supply depends on the relay ...
    (sci.electronics.design)
  • Re: Where are all the ESR meters?
    ... DVM we have to make a voltage that is proportional to the ESR. ... Having more power from an AC supply would ... The interesting relay could ... a Discharge mode to the ESR Measurement mode. ...
    (sci.electronics.design)
  • Re: Toshiba high voltage problem
    ... >>when I push the power button on, the relay clicks supplying power and I ... >>voltage attempting to build up then just about a second the relay clicks ... >>When I remove the high voltage cap from the picture tube the relay remains ...
    (sci.electronics.repair)
  • Re: Viewsonic 21" P815 -2M G3 chassis Monitor clicks clicks clicks. Schematic link also
    ... Chris Mares wrote: ... > Before I started working on it the symptoms were: Power on, ... > is green, relay clicks on, then degauss noise is heard, relay clicks ... > found excessive voltage at ribbon cable supplying EHT board that should ...
    (sci.electronics.repair)