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 Post subject: How to make multiple jacks disconect speaker.
PostPosted: Dec Thu 07, 2017 7:08 am 
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I'm waiving the white flag here. I saw a YouTube video from Terry Dayton (D-Lab - link below. Go to 4:15) where he built a guitar amp with a built in 8 ohm speaker, and 2 speaker jacks. One 8 ohm, one 4 ohm. I get how to to connect the 8 ohm jack so that if I connect an external speaker, it will disconnect the internal one. But he says that connecting a speaker to either jack will disconnect the internal speaker. So how do you go about also having the 4 ohm jack disconnect the speaker if an external is plugged into it?

I know I'm going to smack myself in the head with the solution, but I just can't figure it out.

https://www.youtube.com/watch?v=1jGIVDWopog&t=541s

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 Post subject: Re: How to make multiple jacks disconect speaker.
PostPosted: Dec Thu 07, 2017 7:53 am 
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A little tricky... but I think this will do the job:

Attachment:
Jacks001.jpg
Jacks001.jpg [ 23.28 KiB | Viewed 118 times ]

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Tom K6VL


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 Post subject: Re: How to make multiple jacks disconect speaker.
PostPosted: Dec Thu 07, 2017 8:57 pm 
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Looks like it would work. Thank You. I think where I was going wrong was trying to keep the polarities the same, but with a single speaker I guess it wouldn't matter.

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