[Elecraft] Diode identification

[George, W5YR]

Just a tag on Stuart's method:

Conventional analog VOM type meters when reading OHMS will have a positive
voltage on the black or (-) lead and a negative voltage on the red or (+)
lead. This is true on all resistance scales. The voltage is essentially
that of the internal battery powering the meter for reading resistance.
Confusing but that is how they work.

The digital DMM type meters appear to always place a positive voltage on
the red or (+) lead.
The voltage on the red lead of my BI 2020 is very tiny but positive in
polarity.

72/73/oo, George W5YR - the Yellow Rose of Texas         
Fairview, TX 30 mi NE of Dallas in Collin county EM13qe   
Amateur Radio W5YR, in the 56th year and it just keeps getting better!
QRP-L 1373 NETXQRP 6 SOC 262 COG 8 FPQRP 404 TEN-X 11771 I-LINK 11735
Icom IC-756PRO #02121  Kachina #91900556  IC-765 #02437

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Stuart Rohre wrote:
> 
> The best sure fire ID is to hook up a known positive voltage to the end with
> the band, and see if it blocks the positive voltage.  Then, reverse the
> supply to check for forward conduction.  An ohm meter with known polarity
> can do this on X100 scale, or on modern DMM ones, they have a diode test
> scale that will read 600 mv when you have positive voltage on the opposite
> side to the cathode.
> 73,
> Stuart K5KVH