Dave
If you know the Zener voltage and the supply voltage then calculating a
reasonable value for the series resistor is pretty straight forward
Dave
On 4/23/2017 2:31 PM, Dave Wood wrote:
Bill, actually what happened is the zener diode that the resistor fed
shorted and that's the reason it burned up. I have two units with this
issue and I cannot read the resistor value since it burned up. What I
would love to know is what the original value of the dropping resistor
was? 73 Dave
On Sat, Apr 22, 2017 at 11:39 PM, Bill Hawkins <bill.i...@pobox.com> wrote:
There is usually a power dissipation reason why a resistor becomes
toast, and the reason is frequently a shorted bypass cap or a shorted
device.
Have you measured the resistance to ground of the end of the resistor
opposite the power supply?
Sometimes inputs get high voltages and short the amplifying device.
Sometimes that is reason the units were for sale.
Hope I'm wrong.
Bill Hawkins
-----Original Message-----
From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Dave
Wood
Sent: Saturday, April 22, 2017 8:43 PM
Anyone on the list own the above Time Code Readesr. I have one of each,
they are identical with the same issue. I need to identify the correct
value of a resistor in the power supply that provides 27 volts to the
input amp. They are both toast in my units and I do not have a manual.
Thanks in advance! Dave _______________________________________________
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--
Dave
manu...@artekmanuals.com
www.ArtekManuals.com
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