[TenTec] Hercules II 9420 power on

[k6jek]

I would like to turn on the 9420 and Hercules II from the 4 pin transceiver connector on the 9420. I've seen older posts but didn't quite get an answer or at least I couldn't figure it out.

According to the power supply (9420) manual page 3-7 second paragraph:

"... This voltage is used to pull in the main power on relays, K1 and K2, by one of two methods. When the 420 amplifier is switched on +15 VDC is routed back down the amplifier power cable to J7 and on to Q7, the relay switching transistor. Q7 pulls in the main power-on relays and powers up the four high current regulators. Alternatively, the amplifier can be off and and if a load is connected to the POWER ON pin of the TRANSCEIVER CONNECTOR (pin 3), Q7 will be biased on and will provide the power-on signal to Q7. In this way the supply can detect when a transceiver has been turned on and will automatically power itself up"

I did not hook up a transceiver. I faked it with a resistor to present a load, a 1.2K then a 600 ohm, pin 3 to pin 1. Sure enough relays clicked. The power supply hummed. The Hercules II did not power up.

There is confusion about the pin numbers: 

Silk screened on amplifier and FIGURE 2-2 in the manual:

	1: GND
	2: PWR ON
	3: +13.5V LO
	4: +13.5V 20A

Schematic:

	1: XCVR PWR (HI I)
	2: XCVR PWR (LO I)
	3: Power ON
	4: XCVR GND

Text

	POWER ON (pin 3)

Two have it one way. Two have it the other way.

Any help would be greatly appreciated.