Confused with A1200 audio connectors.

[Painkiller]

Ok here is the deal have A1200 where the RCA connectors have been removed. So I was thinkin that I install traditional RCA connectors for it, but then stumbled upon something really odd. When the board has the original RCA connectors The left tand right audio poles are connected together :-? How is this possible I mean isn't the A1200 audio stereo which would be damn well impossible to achieve when the left and right poles are connected together or am I missing something here? I'm currently looking at the schematic and needless to say I'm really confused...

[motorollin]

A1200 is indeed stereo. Are you absolutely certain you're not looking at the grounds?

--
moto

[Phantom]

Motorollin is right. I think all Amigas are stereo.

[Painkiller]

motorollin wrote:
A1200 is indeed stereo. Are you absolutely certain you're not looking at the grounds?

--
moto

I'm 100% certain. Measure it yourself if you don't believe me from pole to pole the left and right channel are connected   :-o

[Castellen]

The RCA jacks contain switches which join the independant left and right audio channels together if a single (mono) RCA cable is plugged into the computer.  Likewise, you'll also measure a short with nothing plugged in.

I've written more detail about it here, the schematic also shows this detail (poorly).

[taunusand]

Castellen wrote:
The RCA jacks contain switches which join the independant left and right audio channels together if a single (mono) RCA cable is plugged into the computer.  Likewise, you'll also measure a short with nothing plugged in.

I agree. Never noticed this before, but when reading this thread, I just had to check it on my own A1200  :-D

[Painkiller]

Castellen wrote:
The RCA jacks contain switches which join the independant left and right audio channels together if a single (mono) RCA cable is plugged into the computer.  Likewise, you'll also measure a short with nothing plugged in.

I've written more detail about it here, the schematic also shows this detail (poorly).

Thank you for the info. I couldn't quite figure it out from the schematics I was looking at. BTW is there any place where I could buy these original connectors that have the switches?

[Castellen]

Good question, I've never seen these particular connectors stocked by any of the electronics wholesalers I deal with.

I doubt Commodore would have had them made especially, so you could try the likes of Digi-Key to see if you can find modern equivalents.
Else I have some 2nd hand ones which I could supply if you needed a small quantity.  Email me if interested.

[rkauer]

 Just checked.

 I confirm the RCA jacks on 600 and 1200 have a switch.

 If only one plug is connected, the stereo audio out is mixed.

 But, if you want to source this connector, take it from a dead motherboard (and I said really DEAD).

 I suppose any Amiga, since A1000 have this very same connector.

 In a second tough: why bother? Simply put conventional RCA jacks in it. I doubt anyone want to use mono in their Amiga, anyway. This feature is only useful with A520 or a mono TV set.