I have an older style organ (keyboard) and was wondering if I could incorporate a line-out jack or a jack that bI coulsd patch the organ into my guitar amplifier
You could use a simple attenuator from the speaker output. You could even directly take the line out from the speaker connection IF you're careful and don't let the volume get too high.
It's not bypassing the speaker, it's using IT's output as the input to a line in jack, if you keep the volume low it's fine, if you set the volume too high it depends on the protection circuits that are on that line-in jack.
Connect your guitar amplifier AUX input to the non-wiper terminals of the volume control in your organ.
Run a piece of shielded cable from the organ volume control to a quarter inch jack installed at the back of the organ and you will be able to use standard terminated cables.
Miguel
thank you Externet I have to apologise I really am uneducated in electronics if you could draw a simple schematic I might be able to figure something out
You'd simply wire the speaker to the input of the line-in jack. It's a pretty ugly hack and you'd have to keep the volume on the keyboard very low but it would work.