Electronics > Beginners

Connect vintage turntable with amplifier to another amplifier?

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Larzzon:
So i have repaired a Sanyo G-2312 Portable turntable, it works fine, but with modern technology of small and powerfull speakers i would like to be able to get more sound from the player. My idea is to remove the soldered speaker cables and install 3.5mm mono-jacks and 3.5 mono-plugs on the speakers. This should not be a problem, but getting back to modern speakers, lets say i buy a speaker with 3.5mm aux input then i assume it has an built in amplifier of some sorts, can i connect my two mono jacks (speaker output) with an mono-mono to stereo adapter to the aux input of a portable speaker (like the ones you use with your phone) or an aux input of an amplifier? I would believe that the signal out from my player would be to strong, maybe not strong enough do destroy anything, normally i like the "Learning by burning" but this time i dont want to risk it, i am having a hard time believing i am the first to want to do this so there should be a nice solution to this problem.

Another solution could maybe be to connect an aux cable before the amplifier, but once again i don't know if that would work, is the signal strong enough?

I need some help figuring out what signal i can use.

Best regards

Stefan Larsson

mariush:
I would encourage you to find the output of the pre-amp  , before the sound is amplified for the speakers.

Can't find a free schematic online so maybe if you take some clear pictures of the circuit boards inside, someone could give you some pointers here?

Larzzon:
Ok, so it is after the preamp i should connect, i haven't either found any schematics for this player unfortunately. But i will take a look and if i can't figure out where the preamp is (which i likely wont) i will try to take good pictures and post it here.

Best regards

Stefan Larsson

Larzzon:
I figure that the small card is the amplifier. Maybe the input to the potentiometers for volume would be the after the preamp?

Gyro:
Wow, that's a little one!  :D

Yes, the small board with the aluminium strips clamping the 4 transistors is the speaker amp.

It inputs to it are the two screened cables (one grey, one brown), They are probably coming straight off the volume control but tone controls might be involved too, it's hard to see.

If you tap off on those, you will at least be bypassing the speaker amp distortion.

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