The 4 pin connector is intended to power a rig like the Omni V or Omni VI. The
Power ON on that connector is for those rigs only. It does not turn power on
to the Herc II.
Similar power on connections for the Herc II can be found in the crazy 12-pin
Molex(?) connector that also feeds DC to the Herc II. I believe that would be
pins 3 and 9.
73,
Rick
VE7TK
Website: http://www.ve7tk.com
To:tentec@contesting.com
Subject:[TenTec] Hercules II 9420 power on
From:k6jek <k6jek@comcast.net>
Date:Wed, 12 Jun 2013 16:31:03 -0700
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.
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