Cobra 2000 frequency counter diode equivalent?

[67Malibu]

Greetings everyone. Does anyone know if there a modern equivalent diode available to replace D528 (XZ057 Zener) in the Cobra 2000 frequency counter? AI recommended the 1N4734A, which did not correct the problem. I wound up pulling a XZ057 from a parts 2000 counter. I would much rather install a new part, if available. Thanks to all.


Equivalents from the Sam's 251 manual:

SK3057
ECG136A

 

[brandon7861]

Was it in the right way (sorry for asking, I've done it myself)?

That part # should have worked unless it was in backwards or they came from the amazon/ebay type sources. The 1N5919BG is a 5.6v 3w zener.

 

[SuperLid]

Greetings everyone. Does anyone know if there a modern equivalent diode available to replace D528 (XZ057 Zener) in the Cobra 2000 frequency counter? AI recommended the 1N4734A, which did not correct the problem. I wound up pulling a XZ057 from a parts 2000 counter. I would much rather install a new part, if available. Thanks to all.


Equivalents from the Sam's 251 manual:

SK3057
ECG136A

There is no magic here. The 5.6V Zener should have worked. I would use a 1 watt part, rather than the .5W the factory used.

 

[67Malibu]

It was installed correctly. I ordered them from Mouser. That 1N4734A is 1w, 5.6v, but it didn't correct the problem.

Has anyone actually successfully installed a currently available zener at D528? If so, please advise on which part number was used.


Many Thanks.

Jay

 

[67Malibu]

Okay. Maybe the 1N4734A itself was bad. I'll try another one.

Thanks again!

Jay