[TenTec] 9420 Power Supply Question

[Ken Brown]

Hi Joe,

The "Power On" pin of the four pin transceiver power connnector is pin 
3. The "Power On" pin of the twelve pin amplifier power connnector is 
also pin number 3. When the 9420 is plugged in to AC mains, T5 gets 
primary power regarless of "power on" pin status. T5 and some diodes and 
a regulator U1 produce "+REG" a 15 volt "keep alive" power supply. The 
narrative description with my 9420 explains that the amplifier "power 
on" lead  is activated by connecting "+REG", which is on pin 6 of the 
amplifier power connector, to "power on" pin 3. The transceiver "power 
on" is activated by connecting a load to this "power on" lead. The text 
does not say what they mean by a load, and it does not say just to 
ground it. I'll look at my Omni VI manual and see what it connects to pin 3.

DE N6KB


Joe wrote:

> I want test my 100 amp 9420 power supply that goes with the Herc II amp with out the amp connected. If I short pin 1 and 2 on the transceiver connector, will the power supply come on? What pins would I short to turn it on using the amp 12 pin cable. Any help would be much appreciated.  Joe  N9VX 
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