On 5/8/06, Mike Harrison <mike@whitewing.co.uk> wrote:
>
>
> R2 in mine is 180 ohms. It also shows no signs of having overheating,
> despite daily use for over 12
> years, so I suspect your has been getting too hot.


Thanks Mike!  What's the wattage and tolerance?

Just got off the phone with a Metcal support person, and he said that he
didn't have access to schematics.  For a flat $160 fee they would replace
the whole board.  Which isn't too bad, considering the cost of a new one but
if a $1.00 resistor will fix it that just makes me happier for obvious
reasons.

I have had a dodgy cable affect output so this may be the problem. Not
> convinced about the
> capacitance thing - more likely broken strands in the cable.
> For reference mine measures 3.5 ohms across the plug with a tip fitted


I measured 3.4 to 3.6 ohms across the plug, using four different tips.  My
friend who told me this was trained by a factory rep from Metcal.  I
questioned that also, but he said it was straight from the horse's mouth.
But when I talked to the rep a few minutes ago, he said that the cords do
not fail often and when they do they fail open.

Regards,
Bob
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