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Old 25th Jan 2018, 11:10 pm   #1
HiFiNick
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Default Garrard 5.300 autochanger

Hi there,
Having recently got the bug for buying and listening to 45's, I decided that I should get an autochanger to play them on just like we had at home 40 years ago.
So I've now gone and got myself a Garrard 5.300. Its just the chassis, its in its original box and its looks like its never been used. When it arrived today my heart said plug it in and give it a go but my head said no. I know I'm going to need to mount it on a plinth with a lid but are there things I need to do and test before I use it? The turntable rotates, the sliders move freely and it has the two spindles. However, there was a small 'c' clip in the box which may be from the unit somewhere, not sure where though! It looks like it has a ceramic cartridge fitted as its one of those which you can rotate for lps and 78s. Will I be able to connect the output to non phono amplifier input?
Any help in getting me started would be appreciated.
I've always had a fascination for autochangers I think they're really clever!
Nick
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Old 25th Jan 2018, 11:45 pm   #2
'LIVEWIRE?'
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Default Re: Garrard 5.300 autochanger

If the cartridge is Ceramic it should give a good account of itself via an auxillary input on your amplifier. The term 'Aux-in' basically applies to inputs such as those for tuner, tape deck, CD player, etc., so, at least in theory any of those can be used with a ceramic pickup
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Old 26th Jan 2018, 1:09 am   #3
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Default Re: Garrard 5.300 autochanger

look after that 'C' clip for the time being as it may be crucial to the operation of the deck, especially if it's the one from the platter spindle.

It may be helpful to know the exact type number of the cartridge - perhaps a close up picture would help.
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Old 27th Jan 2018, 5:27 pm   #4
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Default Re: Garrard 5.300 autochanger

Hi, you might find that connecting a ceramic the AUX input of your amplifier results in a usable but slightly lacking in Bass output due to an impedance mismatch.
An alternative would be to connect the ceramic cartridge to the RIAA equalised "PHONO" input of your amplifier via a matching pad, often a couple of 470K (or thereabouts) resistors in series with the left and right channel +ve cartridge outputs may suffice.

A fancier circuit is shown here if adding series resistors doesn't produce the desired results via the phono input.

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Andrew
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Old 28th Jan 2018, 12:25 am   #5
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Default Re: Garrard 5.300 autochanger

Lots in the Vinyl Engine Garrard room about these Unimech decks. Grease goes gummy as on all Garrards post early 60's and plastic parts can break if forced. The mech is also not the easiest to work on, so please try not to break anything before the poor thing has ever been used.

Preamps for 'pickups' offering around 1M impedance are available. The low input impedance of an amp 'Aux' input is a sonic disaster - I speak from experience...
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Old 7th Apr 2018, 10:14 pm   #6
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Default Re: Garrard 5.300 autochanger

Hi all. Firstly, many thanks to all who posted helpful tips to my first message.

I've now got my autochanger mounted on a wooden plinth, with a perspex lid and some connections on the back. All works mechanically which is a relief. However, I now need some help with the output signal.

I'm using an Arcam Alpha 6 amplifier and I'm experiencing problems with the autochanger output, as previous posts have already highlighted to me that I might. I've established that the cartridge is a KS40A which seems a pretty good ceramic unit.

So....

If I connect it to the Aux input, the output is too quiet and lacking bass. If I carefully connect it to the Phono input there's a loud hum present all the time (with and without a ground) and the output is too loud.

Where should I go from here? As I'm not an electronics person, is there a ready made circuit out there which I can buy which will solve my problem? Which will be the best route to go - Phono? or Auxiliary?

Hopefully someone out there can help me.

Nick
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Old 8th Apr 2018, 11:10 pm   #7
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Default Re: Garrard 5.300 autochanger

See andy's post #4 ;-)
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Old 9th Apr 2018, 10:15 am   #8
Edward Huggins
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Default Re: Garrard 5.300 autochanger

Looking at the OP's photos above, the deck transit screws appear not to have been released.
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Old 9th Apr 2018, 10:56 am   #9
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Default Re: Garrard 5.300 autochanger

As Edward has pointed out, the transit screws should be screwed fully downwards so that the deck floats on its springs when playing records.
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Old 16th Apr 2018, 8:44 pm   #10
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Default Re: Garrard 5.300 autochanger

Ooops I must remember to do this - I was probably too excited to get it up and running that I forgot to do it!
I'm dusting off my soldering iron and I'm going to make up a couple of the fancier circuits as highlighted by Andy.
I'll keep you posted on progress.
Nick
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