Absolutely, if you have the schematic, or a good eye, you can find the
two 1N34 diodes used in the SWR sensing bridge circuit. With power off
the rig, simply test them with the diode test or ohm meter ranges of a
DMM or VOM. On diode test, you should get 0.3 Volts in one direction
for a good germanium 1N34. With ohm meter, you get high resistance one
direction, then reverse the test leads and you get a lower resistance
for a good diode.
You get nothing for either test if the diode is open, or no voltage for
a shorted diode, and a low resistance both directions of the probes for
shorted diode.
-Stuart Rohre
K5KVH
On 5/23/2011 7:51 PM, Richards wrote:
Can one test that at home with a simple tool, such as a multimeter
before calling TT ?
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