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Author Topic: Just Turned on My Datron 4000A and after 20 minutes Poof  (Read 1217 times)

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Offline Johnny10Topic starter

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Just Turned on My Datron 4000A and after 20 minutes Poof
« on: June 26, 2022, 04:25:31 pm »
Just Turned on My Datron 4000A and after 20 minutes Poof blew a tantalum and whew what a smell.
First power up in three years.
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Offline Gyro

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Re: Just Turned on My Datron 4000A and after 20 minutes Poof
« Reply #1 on: June 26, 2022, 06:31:43 pm »
Right alongside a row of pristine looking Rifas, now there's irony! :D

Datrons do seem to eat Tant beads, particularly after storage. Their PCB lead spacing isn't ideal - lead stress during hand assembly cracks their encapsulation and allows moisture in.

« Last Edit: June 26, 2022, 07:33:24 pm by Gyro »
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Offline TiN

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Re: Just Turned on My Datron 4000A and after 20 minutes Poof
« Reply #2 on: June 27, 2022, 04:04:20 am »
Typical. See tantalum in high-end calibartor = strike them cold erm...replace on sight.
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Offline bdunham7

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Re: Just Turned on My Datron 4000A and after 20 minutes Poof
« Reply #3 on: June 27, 2022, 04:33:25 am »
Quote from: TiN on June 27, 2022, 04:04:20 am
Typical. See tantalum in high-end calibartor = strike them cold erm...replace on sight.

Not just high-end...

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Offline branadic

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Re: Just Turned on My Datron 4000A and after 20 minutes Poof
« Reply #4 on: June 30, 2022, 12:43:12 pm »
I'm currently in the process of a full recapping on my Datron 4000A as well. In a view days from now my replacement list will be complete and I can then share it here. I replace almost all of the tantalum caps by proper electrolytics except for two caps: a 100nF/35V and a 470nF/35V.

https://www.eevblog.com/forum/repair/datron-4000a-getting-at-test-points/msg4248334/#msg4248334

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