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PostPosted: Tue Dec 12, 2017 2:53 pm 
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Location: Lakewood Ranch, FL, US
HELP PLEASE!

I have a 1970's Technic turntable that I can't find an amplifier to make it work. I have purchased pre-amp and that didn't do it and now I have my hands on a Marantz Stereo Receiver SR 68. Everything I find online tells me this will work but I don't know what and how to connect the two pieces of equipment. Any help will be greatly appreciated. This turntable is unusual because I can stack 10 vinyls and listen to music all evening without changing records every few minutes. I don't want to give up on this.

So far I have hired someone to come out and the didn't work and Ive tried 4 different types of equipment but I think they were incorrect for the need. I have good speakers, wire and no expertise to connect. The phono has a red and white plug and what I think is a grounding thing. The receiver has a red and white for Phono but that didn't work when I plugged it in.

The receiver was working when I bought it and the Polk speakers (together) and this was all hooked up as external speakers to a TV, so I know its not the amp. I also have holes for CD, AUX, Tape out and in. I have 2 red holes for remote control, a red and white for "Pre out L R" and I have 4 sets of wire connectors. 2 switched AC outlets.

Thanks in advance for any guidance and help. This project has been going on for over a year without any help or resolution.


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PostPosted: Tue Dec 12, 2017 2:58 pm 
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Location: Toronto, ON, CA
Welcome to the forums. Do you have the model of the turntable?


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PostPosted: Tue Dec 12, 2017 3:15 pm 
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SL 1650 Technics
Thank you for helping me.


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PostPosted: Tue Dec 12, 2017 3:21 pm 
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Thanks. TBH, never seen one. BUT…it is no different from the SL-1600 sans longer spindle and changer mechanism.

This table comes with a Moving Magnet cartridge to which should work with your Marantz if connected to the RCA inputs labeled Phono. You also have to connect the ground wire. Any receiver or preamp that has a dedicated Moving Magnet phono stage will work. Moving magnet is sometimes referred to as MM.

Saying that, I suspect there is something wrong with the table. Either internal wiring or the cartridge itself. Have you had a technician look at it to verify that it works?


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PostPosted: Tue Dec 12, 2017 3:35 pm 
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Where would the MM be and what does it do?

What kind of tech do I need to call? An audio specialist or what? During the course of this task, we have intermittently heard sounds from the phono, somewhat.

I assume the ground wire will connect to the amp?

Thanks much.


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PostPosted: Tue Dec 12, 2017 3:43 pm 
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Location: Vancouver, BC, CA
You're in Lakewood Ranch, Florida? It looks to me like there's at least one audio tech in Bradenton. Google "bradenton florida turntable repair" and you will likely get a few options.


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PostPosted: Tue Dec 12, 2017 3:48 pm 
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RitaL wrote:
Where would the MM be and what does it do?

What kind of tech do I need to call? An audio specialist or what? During the course of this task, we have intermittently heard sounds from the phono, somewhat.

I assume the ground wire will connect to the amp?

Thanks much.


MM is the type of cartridge on the turntable. The cartridge is also referred to as the needle (in simple terms). The back of your Marantz will have an input called Phono. This is where you connect the turntable – just match the colors. But also connect the ground wire to that small thumb screw beside the phono inputs. If you have tried this and it does not work, then you will need to find an audio technician to trouble shoot your turntable. If there is a problem with your turntable it could be the cartridge (needle) or it could be the wiring inside the turn table. The audio technician should be able to figure it out.

Can’t help you with an audio technician in Florida. But I am willing to check it out myself at the cheap cost of a flight from Toronto :wink:


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PostPosted: Tue Dec 12, 2017 3:55 pm 
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Location: Lakewood Ranch, FL, US
You know what, I replaced the needle when all this started. Maybe it was wrong!

Can you give me the correct needle cartridge i should get?

That may be the problem!

Thank you.


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PostPosted: Tue Dec 12, 2017 4:39 pm 
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Can you take a close up picture of the needle??

I think my over simplifying might have complicated things a bit. My bad

Referring to the picture below, the cartridge will be the whitish piece. This has connection points for 4 wires on the back that are color coded. The needle will be the green piece that fixes to the cartridge. The 2 have to be compatible. Did you change the green piece (or what ever color yours is) or the whole cartridge? If you just changed the needle, chances are you have the right one cause a wrong one most likely will not fit.

Again, a picture will be great help


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PostPosted: Tue Dec 12, 2017 5:17 pm 
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Location: Lakewood Ranch, FL, US
Here are my photos.


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PostPosted: Tue Dec 12, 2017 5:24 pm 
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Excellent. All looks good there. The only advice I can give outside flying me to Florida is to take the turntable to an audio technician. Sorry I couldn’t have been more helpful. Good luck.


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PostPosted: Tue Dec 12, 2017 5:31 pm 
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Thank you so very much.

Rita


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PostPosted: Tue Dec 12, 2017 5:39 pm 
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My pleasure. But keep an eye on this thread, others may have some advice.


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