[Boatanchors] CORRECTED: 1N3033B substitute?

[W2HX]

Sorry, typo in that email. Substitute part would be 1N4753A
Thank John!
Eugene


-----Original Message-----
From: boatanchors-bounces at mailman.qth.net
[mailto:boatanchors-bounces at mailman.qth.net] On Behalf Of W2HX
Sent: Wednesday, April 15, 2009 11:26 PM
To: boatanchors at mailman.qth.net
Subject: [Boatanchors] 1N3033B substitute?

I have found what appears to be an out of spec zener diode in my bias
circuit. I am hoping this is my problem!

The zener should be 36V but this one is reading 26V. Part number is 1N3033B
but it looks like an obsolete part. I looked through mouser and found 1N473A
that looks promising, but before I buy, install and fry something - anyone
have an opinion?

Comparing the datasheets the differences are:

Test current (Iz)
original=7.5mA,
replacement=7mA

Max Reverse Leakage Current (Ir)
original= 10 uA @ 27.4V
replacement 5 uA @ 27.4V

I can't quite tell if the replacement is more "stout" than the original or
less stout?

I don't know if that extra .5mA of test current is important or if 5uA is a
"better spec" or under-rated comared to 10uA?

Is there a better or "official" substitute?

As always, very much appreciated!

Eugene w2hx



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