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Vintage Audio (record players, hi-fi etc) Amplifiers, speakers, gramophones and other audio equipment.

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Old 19th Jun 2017, 8:44 pm   #1
rockinmark
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Default Technics Amplifier.

Hi picked up a little Technics Amplifier. I noticed that the link bar on the ext in/out is missing. I have not tried the amplifier yet I noticed this link on amplifiers.

What does it do it? Should be there. what should I use for it?
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Old 19th Jun 2017, 8:49 pm   #2
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Default Re: Technical amplifier

The amplifiers I used to see you could fit a graphic equalizer in place of the links. If you don't have the links you can use a set of phono leads.
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Old 19th Jun 2017, 9:30 pm   #3
rockinmark
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Default Re: Technical amplifier

If they're not there what happens? Do you only connect the middle? Will a wire coat hanger work.
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Old 19th Jun 2017, 10:27 pm   #4
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Default Re: Technics Amplifier.

Yes, that will work, though it's a bit of a bodge.
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Old 19th Jun 2017, 10:28 pm   #5
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Default Re: Technics Amplifier.

Wire coat hangers at low grade steel plated with something.

You could suffer poor connections and maybe damage the sockets. The connections won't be screened either.

Get a couple of phono leads from Maplin.
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Old 19th Jun 2017, 10:33 pm   #6
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Default Re: Technics Amplifier.

Or even Poundland!

To be fair, these were often fitted with solid metal links originally. The NAD 3020 has them.
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Old 19th Jun 2017, 11:09 pm   #7
rockinmark
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Default Re: Technics Amplifier.

This is what I don't understand the link doesn't use the outermost part using Phono. I would also I would like to make it look original For my own benefit
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Old 19th Jun 2017, 11:13 pm   #8
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Default Re: Technics Amplifier.

The outer parts of the phono sockets are already interconnected within the amp, hence they don't need to be connected externally. They're only there so they can be connected to external equipment if used, a graphic equaliser, for example.

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Old 19th Jun 2017, 11:27 pm   #9
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Default Re: Technics Amplifier.

I think the graphic equaliser explanation is most likely in this case, but sometimes this was done to allow the amp to function as a preamp for an external (presumably better) power amp.
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Old 20th Jun 2017, 1:12 am   #10
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Default Re: Technics Amplifier.

I always thought that it was for the connection of a power amp or a better quality pre-amp.
My graphic even in the manual says connect it via the tape in and out sockets of the amp. It doesn't mention using those types of sockets at all.
They are also handy if the pre-amp or power amp fails. As you can always connect up a replacement for the section that failed. Especially if you can't find the replacement part. Saves you buying one or the other!
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Old 20th Jun 2017, 5:41 am   #11
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Default Re: Technics Amplifier.

I have a few phono jumper leads somewhere that are ideal for this sort of thing. I tried to google "pre/power link for amplifier" (someone must sell em) but only got links trying to sell me an amp.

I've seen two phono/RCA plugs with the plastic caps taken off, earth "bars" soldered together, with a bit of wire soldered to the hot/signal used as jumpers before.

Either way I have loads of RCA plugs I'll never use and I'm happy to knock you some jumpers up or you can have some of those jumpers I mentioned at the start of this post,; I havn't a use for them. Drop us a PM if interested.

Andy.
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Old 20th Jun 2017, 7:27 am   #12
rockinmark
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Default Re: Technics Amplifier.

Am I right in thinking that if not fitted there would be no sound because it would only be a pre amp
Andy thank you for the offer that is much appreciated I will see if I can find some first
I only got this for the logo and only paid £1 but it looks in good condition and I hate taking things apart if still work
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Old 20th Jun 2017, 8:40 am   #13
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Default Re: Technics Amplifier.

You are correct. Those terminals are (1) from the pre-amp output, and (2) to the power amp. input, so they must be bridged. As others have said two short RCA(Phono) jumper leads will be OK for this purpose.
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Old 20th Jun 2017, 9:00 am   #14
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Default Re: Technics Amplifier.

Thoe curved metal pieces were done that way because they were cheap. The signal level on them is high enough that lack of screening isn't a concern. The only real drawback is it anything conductive was floating around the back of your amplifier and touched them. No damage, just crackles and maybe loss of sound until removed.

On the whole, a couple of short phono to phono leads are better than the original.

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Old 20th Jun 2017, 3:11 pm   #15
rockinmark
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Default Re: Technics Amplifier.

Thanks everyone for the help
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