[ICOM] (no subject)

[mikea]

On Mon, Aug 03, 2009 at 09:10:44AM -0700, Larry Young wrote:
> Jeff:The place to measure the Vcc is at the power connector at the
> back of the radio, not at the power supply output terminals. You could
> be getting excessive voltage drop in the power cables which should
> be as secure as possible. Check the connections of the series fuses
> if any in the power cord, as those can become resistive or dirty.
> The power connectors thmselves can also become resistive and cause a
> voltage drop. Of course you want to check power when working into a 50
> Ohm dummy load or a known 50 Ohm antenna.

In my experience, fuses themselves sometimes become resistive -- not so
much that the IR drop heats them to failure immediately, but enough to
absorb and dissipate power undesirably.

-- 
Mike Andrews, W5EGO
mikea at mikea.ath.cx
Tired old sysadmin