[TenTec] Hercules II 9420 power on

[Rick W]

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 at contesting.com 
Subject:[TenTec] Hercules II 9420 power on 
From:k6jek <k6jek at 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.