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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 2 years 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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0 Ian-Scott over 2 years ago in reply to kardan

There's a row of 3 r33 wirewound resistors down each side next to the power transistors. I bought some off eBay
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0 kardan over 2 years ago in reply to michaelkellett

OK, ty. but i wonder where on the circuit board, I've been looking but cant find those you talk about. Aaa, ok it says a dot and 3 ohm on the circuit diagram? So the other one will be 66ohm? I have mesure them and thay seems to be 4-6 ohm.
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0 Ian-Scott over 2 years ago
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0 Ian-Scott over 2 years ago
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0 kardan over 2 years ago in reply to Ian-Scott

I got +- 56v
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0 Ian-Scott over 2 years ago in reply to kardan

That's .33 and .66 ohm not 33 and 66 ohms

www.ebay.co.uk/.../i.html
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0 Ian-Scott over 2 years ago in reply to kardan

That's probably about right depending on what paperwork you have it's either +-60 or +-50v the circuit diagram says +-60v
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0 kardan over 2 years 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 2 years 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 2 years ago in reply to kardan

Yes two 15v zeners to give +- power to the op amp
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