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Author Topic: HP 8752C A3 source parts identification help needed  (Read 1980 times)

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Offline WuLiTopic starter

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HP 8752C A3 source parts identification help needed
« on: April 24, 2014, 12:09:05 pm »
Hi all,
I'm in the proces of debugging the signal source of my vna and I need some help on identifying two zener diodes. The diodes have the following codes on them:
1) 106 25K 507
2) 685 35K 451
I was able to retrieve the zener voltage of the first diode because there are more of them on the same board. It's a 22V zener. I'm unable to retrieve the value of the second one. There seems to be no logic in the coding. Can anybody help me out? I've attached a picture the two diodes are the ones with the black marker dots on them.
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Offline Thomas

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Re: HP 8752C A3 source parts identification help needed
« Reply #1 on: April 24, 2014, 01:00:07 pm »
They are not diodes, they are tantalum capacitors. The band is on the positive terminal.
1) 106 = 10 with 6 zeros behind = 10 000 000 pF = 10uF, 25V. K is the tolerance.
2) 685 = 68 with 5 zeros behind =  6 800 000 pF = 6.8uF, 35V.
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Offline Sailor

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Re: HP 8752C A3 source parts identification help needed
« Reply #2 on: April 24, 2014, 01:01:58 pm »
Are you sure they're diodes? They look like tantalum caps to me.
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Offline WuLiTopic starter

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  • Posts: 5
Re: HP 8752C A3 source parts identification help needed
« Reply #3 on: April 24, 2014, 01:20:40 pm »
Wow guys, that was fast.. Thank you very much.
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