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Forum Can someone help identifying what this are? I reckon it is an old diod. Need something to replace it with

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Can someone help identifying what this are? I reckon it is an old diod. Need something to replace it with

kardan over 1 year ago

TUAC TD500-C1 mono amplifier

TUAC TD500-C1 amplifier board

The simple markings on photo does not have the Anode and Cathode marked.

Please reload the page as I have updated the last image.

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geralds over 1 year ago in reply to Ian-Scott +3

Hi Ian-Scott Just I've rotated it for some readers. Best Regards Gerald ---
Ian-Scott over 1 year ago +2
Ian-Scott over 1 year ago in reply to kardan +2 verified

The diodes you have marked as 1n4148 next to .1k 250 either side of the op amp I'm sure should be 15v zenners ?

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0 Ian-Scott over 1 year ago
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0 Ian-Scott over 1 year ago
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0 Jan Cumps over 1 year ago in reply to Ian-Scott

Great!
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0 Ian-Scott over 1 year ago in reply to Jan Cumps

One is TD300 the other TD500
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0 geralds over 1 year ago in reply to Ian-Scott

Hi Ian-Scott

Just I've rotated it for some readers.

Best Regards

Gerald

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0 kardan over 1 year ago in reply to Ian-Scott

Thank you so much :)
I will now check what is correct and if something has been changed by someone else

So it should be a 6.3A T fuse? someone has changed this to 10A T and the other 10A F
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0 Ian-Scott over 1 year ago in reply to kardan

Both should be 6.3a TD
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0 Ian-Scott over 1 year ago in reply to kardan

I would check those smoothing caps on the rectifier boards they would have both been the same and TBH they look well old
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0 kardan over 1 year ago in reply to Ian-Scott

I only have 100pf and 220pf on my board. on the schematic there are several other values. And it seems to be other differences on TD-500-C1, and additional components
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0 kardan over 1 year ago in reply to Ian-Scott

If I understood this correctly, there should be 3 different diode. IN4002 1N4148. Op-amp OF 351 and UA741CP both need 15v. By the Op-amp, there are two 15v diodes. BZ15.
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0 Ian-Scott over 1 year ago in reply to kardan

Yes two 15v zeners to give +- power to the op amp
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0 Ian-Scott over 1 year ago in reply to kardan

And 1n4148 & 1n4002
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