Old Rotel TT in bad shape

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Macadoo
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Old Rotel TT in bad shape

Post by Macadoo » 17 Feb 2019 18:23

Hi folks,
I'm new to this site and haven't pulled out my vinyl for almost 20 years. I'm not an audiophile, rather a casual listener but I do appreciate a quality stereo system.

Anyway, I picked up a Rotel RP-6400 at a yard sale last summer for a whopping $2.00, lol. Mechanically it is sound; holds a consistent speed, all the auto stuff works fine, but the cue is sketchy and I think the tone arm is set too heavy; it won't lift all the way up.
The RCA jacks and cable were clipped off, flush with the deck for some odd reason. I soldered in new cables and ground wire so that's taken care of.
I saw when I bought it that it had a Marantz headshell so I knew I'd have to replace that. What I wasn't counting on was, when I pulled the head, all the connector pins, male and female, were gone and the cart was hooked directly to the wiring from inside the deck.
I've done whatever reading there is to do on this deck and it seems it's on the low end of the high-end spectrum so might be worth a couple of bucks to fix but I have no idea where to start looking for the missing parts. I've found some generic stuff but I'm worried about proper weight distribution.
At this point I'm just looking for some advice, such as would these eBay parts fit?

https://www.ebay.com/itm/New-Straight-T ... 1529642299

https://www.ebay.com/itm/STEREO-HI-FI-T ... 1729578687

Thanks for reading this :)
-Mac
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Macadoo
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Re: Old Rotel TT in bad shape

Post by Macadoo » 17 Feb 2019 18:30

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Alec124c41
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Re: Old Rotel TT in bad shape

Post by Alec124c41 » 17 Feb 2019 20:10

Well you have the right idea. The straight headshell was a bad move, and the headshell you are looking at would have been more appropriate. This is also a much lighter item.
However the arm fitting is for a standard headshell, and will not match with the angled headshell. Finding the correct fitting might not be easy.
The black tube on the back of the Marantz headshell is obviously part of the arm. With that, you might be able to fit the proper hedshell, but you might have to put pins on the ends of the wires, to fit the headshell sockets, or drill the headshell out, and use the straight-through wires.
Those angled headshells were shaped to fit a shaped socket, which has probably been drilled out.

Cheers,
Alec

toaster999
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Re: Old Rotel TT in bad shape

Post by toaster999 » 17 Feb 2019 21:13

Well no advice just encouragement. Its in good shape cosmetically - not to have to deal with scratched top plates, dented plinths, auto/motor problems is a good start. Worth the effort.

Macadoo
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Re: Old Rotel TT in bad shape

Post by Macadoo » 17 Feb 2019 21:38

It is in very good cosmetic shape except for the cover. It looks like someone accidentally sprayed brake cleaner on it (yeah, that was me).
I may go ahead and order these parts and adapt as necessary. I'm pretty good with my hands. Do you folks ever use dialectric grease on the connections (in case I have to use copper for the pins)?

Thanks for the input.

nat
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Re: Old Rotel TT in bad shape

Post by nat » 17 Feb 2019 22:12

I think you might be able to substitute the whole arm tube or just the bayonet and headshell from another straight arm. Obviously the tube diameter would have to be the same. But many look like they are similar, and many were made by CEC or Funai from common parts, so if you can find a donor, it would be worth trying.

nat
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Re: Old Rotel TT in bad shape

Post by nat » 17 Feb 2019 22:14

It might be worth seeing what is there from the Marantz headshell - if it is restorable, it might repay the effort since people always look for Marantz stuff, even though that isn't one of their high end shells since it is stamped not cast.

Macadoo
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Re: Old Rotel TT in bad shape

Post by Macadoo » 17 Feb 2019 23:34

Wow guys, great minds think alike! I do have an el-cheapo Akai (selling on eBay for about $50.00) and the [bayonet?] looks to be the same as the pic in the above link. The tone arms measure within .02 mm and that difference just might be my measuring. Now I have to decide between a working low end model and a possible mid-range.
Grooovyness is correct, harder than it looked but not impossible.
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Either way, this project will have to wait until next weekend.

AudioFeline
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Re: Old Rotel TT in bad shape

Post by AudioFeline » 17 Feb 2019 23:51

Macadoo wrote:
17 Feb 2019 18:23
...The RCA jacks and cable were clipped off, flush with the deck for some odd reason...
In my land electrical devices put out for roadside collection have their electrical wires cut by a council officer while they wait for the collection to be made, to prevent people from taking and using a potentially unsafe device.

It also can be standard practice by some organizations for electrical devices allocated for disposal (for the same reason).

Nice score for $2!

Macadoo
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Re: Old Rotel TT in bad shape

Post by Macadoo » 18 Feb 2019 00:08

AudioFeline wrote:
17 Feb 2019 23:51
Macadoo wrote:
17 Feb 2019 18:23
...The RCA jacks and cable were clipped off, flush with the deck for some odd reason...
In my land electrical devices put out for roadside collection have their electrical wires cut by a council officer while they wait for the collection to be made, to prevent people from taking and using a potentially unsafe device.

It also can be standard practice by some organizations for electrical devices allocated for disposal (for the same reason).

Nice score for $2!
Huh, thanks AudioFeline, that's interesting. I've been through the innards and it all looks copacetic to me. My guess is that someone needed the RCA jacks for another project and didn't know any better to open the bottom of the deck and unsolder them.
In any case, I think I'll rig the old Marantz headshell and make sure this thing puts out sound before I sacrifice the Akai.

Macadoo
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Re: Old Rotel TT in bad shape

Post by Macadoo » 18 Feb 2019 01:24

nat wrote:
17 Feb 2019 22:14
It might be worth seeing what is there from the Marantz headshell - if it is restorable, it might repay the effort since people always look for Marantz stuff, even though that isn't one of their high end shells since it is stamped not cast.
Worth a thought. Although I doubt I could GIVE it away they way it's been gutted.

Alec124c41
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Re: Old Rotel TT in bad shape

Post by Alec124c41 » 18 Feb 2019 05:29

I suppose you could replace the arm entirely, but you would lose the auto functions if you did.

Cheers,
Alec

Vinylfreak86
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Re: Old Rotel TT in bad shape

Post by Vinylfreak86 » 18 Feb 2019 14:31

It is not a bad shape, not for this guy. It is a delicacy for a specialised servicemen. MS thing, but tonearm have to be replaced with a Jelco S-shaped one.

Macadoo
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Re: Old Rotel TT in bad shape

Post by Macadoo » 23 Feb 2019 05:21

Well folks, I got it working. I nabbed the headshell, bayonet, and wiring from the Akai. I fished the wires through the tonearm using the old wires and soldered them up. The bayonet was a perfect fit and now I have the proper male and female connectors for the headshell. It sounds pretty darned good too; much better than the Akai. It really wasn't difficult but I was lucky to have the proper donor table.
Thanks for all the help and opinions.
-Mac
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AudioFeline
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Re: Old Rotel TT in bad shape

Post by AudioFeline » 23 Feb 2019 06:12

Well done Mac. It can be very satisfying to achieved a good outcomes through your own work, especially when the reward is upgraded upgraded sound quality in comparison to the Akai. It's always good to hear stories of old good turntables being saved from the scrapheap.

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