Compatible transister ?

If you want to ask questions about how the machine works, peculiar details, the differences between models, here it is !
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Steve M
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Compatible transister ?

Post by Steve M » Tue Jun 20, 2017 9:09 pm

Is the BC 547 compatible with the BC184 used on the Oric ?

This chap has them on his Oric but the spec says BC184.
https://www.youtube.com/watch?v=hnQKjJMuwQ0

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Silicebit.
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Re: Compatible transister ?

Post by Silicebit. » Tue Jun 20, 2017 10:26 pm

Yes, the BC547 can replace the BC184.
Oric user since 1984. YouTube

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Steve M
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Re: Compatible transister ?

Post by Steve M » Wed Jun 21, 2017 12:04 pm

Thanks.

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Re: Compatible transister ?

Post by Godzil » Wed Jun 21, 2017 11:02 pm

I don't have an oric by hand, which transistor is this one?

I mean where is it located?

Is it TR2? (keyboard related one)

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Re: Compatible transister ?

Post by Steve M » Thu Jun 22, 2017 1:09 am

I think there's three. There's a couple around the tape output, one by the keyboard connection.

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Re: Compatible transister ?

Post by Silicebit. » Thu Jun 22, 2017 9:20 pm

Three transistors, TR1 in tape input circuitry (collector connected to pin 18 of VIA 6522), TR2 in keyboard interface (collector connected to pin 13 of VIA 6522) and TR3 to activate tape relay. All them working in commutation mode.
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