On 01/02/11 01:52 pm, Brian Lloyd wrote:
I have just noticed that although a DVM across the power supply
terminals still shows 13.7 - 13.8 volts when I do key-down into a dummy
load, Ctrl-Shift-I in PowerSDR shows the voltage dropping as low as
12.6. Is this OK?
Check the power at the pins of the connector on the back of the radio.
That's the only way to be sure of what you have.
13.77V at the radio on receive. Drops to 12.9V (same is displayed by
Ctrl-Shift-I) when pulling 20A. Someone else told me that he cranks his p/s
up to 14.1V to compensate for the drop, but I'd have to perform surgery
(change a resistor, as the pot is already at max.) on my p/s to get any
higher voltage out of it.
That seems a large voltage drop when I look at the resistance tables for Cu
wire.
What I really need, I guess, is a new power cable and perhaps even remote
sensing circuitry added to the p/s to maintain the voltage at the rig's
power terminals.
I think you will find that the voltage drop is across the internal fuse.
I don't think so: the DVM at the rig's power terminals shows the same
voltage as Ctrl-Shift-I shows.
Alan NV8A
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