Mono Out Jack

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Kermit
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Mono Out Jack

Postby Kermit » Sun Sep 17, 2017 10:08 am

I was thinking about having a mono out Jack like a Spectrum so I can connect it with an amp or TV speaker.
As the signal coming from the existing speaker is probably the wrong current etc just to connect up, what do I need?
There's units on eBay to turn car speakers to a line output via RCA for around £10. I guess something similar is going to be needed. I don't want to blow up the RAM or cause magic smoke though!
I can't find anything on the forum, but there are articles about doing the same thing to an IBM XT, which is similar. It appears that a capacitor and a resistor are needed?


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Mr_Navigator
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Re: Mono Out Jack

Postby Mr_Navigator » Sun Sep 17, 2017 12:20 pm

Speaker to phono.jpg
Speaker to phono.jpg (5.56 KiB) Viewed 573 times


This should get you going and give you flexibility in voltage levels


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Kermit
ROM Dongle
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Re: Mono Out Jack

Postby Kermit » Sun Sep 17, 2017 7:45 pm

Thanks!


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vanpeebles
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Re: Mono Out Jack

Postby vanpeebles » Mon Sep 18, 2017 8:42 am

It's a shame someone doesn't sell a little kit with a socket and wiring etc, ready to solder to the speaker wires :)


Dave
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Re: Mono Out Jack

Postby Dave » Wed Sep 20, 2017 6:22 pm

This is a standard feature of the Issue 8 board.


Kermit
ROM Dongle
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Re: Mono Out Jack

Postby Kermit » Sun Sep 24, 2017 5:51 pm

Thanks
The parts are on order!
Any ideas where I can fit the socket nicely? I'd rather not drill into the Ql, but I did for my +3e stereo Spectrum and I was happy.


Kermit
ROM Dongle
Posts: 26
Joined: Sat Sep 09, 2017 7:12 am

Re: Mono Out Jack

Postby Kermit » Sun Sep 24, 2017 6:51 pm

Maybe start with a high resistance on the pot and then turn it down? Therefore less chance of damage?



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