Find out the relay coil resistance or current.
The coil should have a electrolytic cap in parallel and a diode and power
resistor in series with this combination.
The resistor sets both the dc voltage across the coil and in combination
with the electrolytic capacitor determines the time constant of the circuit.
Loren WA7SKT
At 02:30 PM 2/12/99 -0600, you wrote:
>
>Hi Gang,
>
>I'm just a neophyte with amplifiers but I'm learning, please excuse my
>ignorance. I'm installing a step start kit in my L-4B amplifier. It has
>two 48V DC relays in parallel with 10 ohm 10 watt resistors. I don't want
>to _borrow_ relay coil power from the place that the step start kit
>manufacturer suggests. The instructions suggest I tap into the voltage
>used for tube cut off. I want to get the voltage to trip the relays from
>the AC power input. I need to make a circuit that will delay the relay for
>1/2 a second. I realize that the power supply is designed to handle the
>inrush without the step start but I want to save wear and tear on my
>irreplaceable on/off switch. What are your suggestions or ideas? Thanks
>in advance and 73,
>
>
>Al
>KE3OK@netins.net
>
>
>
>
>
>
>--
>FAQ on WWW: http://www.contesting.com/ampfaq.html
>Submissions: amps@contesting.com
>Administrative requests: amps-REQUEST@contesting.com
>Problems: owner-amps@contesting.com
>Search: http://www.contesting.com/km9p/search.htm
>
>
--
FAQ on WWW: http://www.contesting.com/ampfaq.html
Submissions: amps@contesting.com
Administrative requests: amps-REQUEST@contesting.com
Problems: owner-amps@contesting.com
Search: http://www.contesting.com/km9p/search.htm
|