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 Post subject: EDIT:: Thought I had a Rca 7-emp-2kk it's actually RP-178
PostPosted: Sep Mon 11, 2017 12:38 am 
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Hey all!
I just purchased this rca cabinet off Facebook recently and the radio works well and the turntable spins but it makes a terrible noise. Could someone tell me what the problem is and maybe how to fix it? I know it needs a new needle but that's about it. I don't really know much about turntables and certainly not ones this old. I feel in love and bought it anyway

Thanks!


Last edited by 19ashe86 on Sep Wed 13, 2017 5:02 pm, edited 2 times in total.

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 Post subject: Re: Rca 7-emp-2kk
PostPosted: Sep Mon 11, 2017 3:07 am 
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https://youtu.be/YPgfHOnFTA4

There's a video of the terrible noise.

HELP!


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 Post subject: Re: Rca 7-emp-2kk
PostPosted: Sep Mon 11, 2017 4:04 am 
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I think you will need to investigate further. To me it sounds like either the changer mechanism isn't disengaging or there is a problem with the drive idler wheel. Usually on mechanical systems like a changer most of the mechanism needs to be cleaned and re-lubricated. Some disassembly might be required.

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747, 465, 1230, 1471B, 2005A, 1075
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LAG-27, LBO-517
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 Post subject: Re: Rca 7-emp-2kk
PostPosted: Sep Mon 11, 2017 4:28 pm 
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I've taken it apart as much as I was comfortable. It's hard to really see underneath as it's still attached to all the wires etc underneath. I ordered a new needle for it today so I'm going to start there. I need to then figure out how to swap the old needle for the new. I've never used a record player this old before lol. When I first plugged it in it didn't even turn but after I missed with some switches it started to turn.. a friend of mine said maybe the belt drive?


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 Post subject: Re: Rca 7-emp-2kk
PostPosted: Sep Mon 11, 2017 5:33 pm 
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EDIT. Whoops! My bad, I didn't notice the title of the thread.
Some later made changers might have used belts between the motor and the turntable but I'm almost certain yours like most used a 'idler wheel'. Please post more pictures.
You can go to an online place like this for parts;
https://www.thevoiceofmusic.com/default.asp
Voice of Music made changers for many makes. The website today has parts for many other makes.
You might want to hold off on the needle (stylus) until you know the cartridge is good. You might have to replace the cartridge with another make because the original might not be available.

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Tim
747, 465, 1230, 1471B, 2005A, 1075
C-3, SG-8, V-7A, TC-2P
LAG-27, LBO-517
5382A, 368, 260, 8024B


Last edited by Notimetolooz on Sep Mon 11, 2017 6:28 pm, edited 1 time in total.

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 Post subject: Re: Rca 7-emp-2kk
PostPosted: Sep Mon 11, 2017 6:25 pm 
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Joined: May Thu 14, 2015 4:15 pm
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Location: Dallas, TX
Now that I've looked a little I see that RCA model 7-emp-2kk seems to belong to a portable player not a changer as shown in the video. Is there another model number?

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Tim
747, 465, 1230, 1471B, 2005A, 1075
C-3, SG-8, V-7A, TC-2P
LAG-27, LBO-517
5382A, 368, 260, 8024B


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 Post subject: Re: Rca 7-emp-2kk
PostPosted: Sep Mon 11, 2017 8:26 pm 
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That is an RCA RP-178 single speed 78 RPM record changer from the late 1940s.

http://www.nostalgiaair.org/pagesbymode ... 015800.pdf


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 Post subject: Re: Rca 7-emp-2kk
PostPosted: Sep Mon 11, 2017 10:28 pm 
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Location: Dallas, TX
Thanks Ken!
Now we are getting somewhere.

19ashe86;
Most turntables have connectors in the wiring under the deck. There should be a connector for the motor and one for the tonearm pickup. Sometimes the wire distance is long between the turntable deck and the connectors. Some times the pickup connector is all the way back at the amplifier. Turntables usually rest on three large springs. Also there are three posts or large screws that are attached to the turntable deck and the project into holes in the mounting board. These posts usually have clips or something similar to prevent the turntable from falling out. Cabinets vary in the ways to access these clips. You need to remove the clips so that you can lift the deck far enough to disconnect the wires. Once out of the cabinet you can more easily work on the turntable. One of the first things to do is remove the turntable itself from the deck. Check the info that Ken linked to, but usually there is a 'C' clip around the centerpost that has to be removed. Sometimes the turntable just lifts off. With the turntable off you can see the idler wheel.

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Tim
747, 465, 1230, 1471B, 2005A, 1075
C-3, SG-8, V-7A, TC-2P
LAG-27, LBO-517
5382A, 368, 260, 8024B


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 Post subject: Re: Rca 7-emp-2kk
PostPosted: Sep Mon 11, 2017 10:49 pm 
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Joined: May Thu 14, 2015 4:15 pm
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Location: Dallas, TX
I see from Ken's info that you have to loosen two screws under the deck to remove the centerpost and the turntable as a unit. This also exposes the turntable bearings.
By the way, WD40 and 3-in-1 oil aren't a good things to use on this sort of thing. Get some light detergent free 10 wt oil, like Norvey's Turbine oil. Also white lithium grease is good for the cams and such in the changing mechanism.

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Tim
747, 465, 1230, 1471B, 2005A, 1075
C-3, SG-8, V-7A, TC-2P
LAG-27, LBO-517
5382A, 368, 260, 8024B


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 Post subject: Re: Rca 7-emp-2kk
PostPosted: Sep Wed 13, 2017 2:38 am 
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Joined: Sep Sun 10, 2017 5:54 pm
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Thanks guys for all your help! I can't honestly remember where or how I got that model number I've looked at so many different websites and googled so much I lost track


When I took the deck off the cabinet to see about unhooking it there was 3 bolt holes but only 2 actually in and only one had a back. I found a not that fit the other and put it on to keep it in place. There are no springs just these rubber pegs that the bolts sit in. Those are still there.

I already ordered the needle for the model I thought it was I'll have to see about returning it.

You guys are amazing thanks so much


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 Post subject: Re: Rca 7-emp-2kk
PostPosted: Sep Wed 13, 2017 2:44 am 
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Here's a link to a bunch of photos I've taken of it

https://drive.google.com/folderview?id= ... GlGRUNJSFE

I hope it works!


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 Post subject: Re: Rca 7-emp-2kk
PostPosted: Sep Wed 13, 2017 2:54 am 
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I cant tell from the video but that looks to be a vinyl 33-1/3 album you have on there. that is a 78 player and will destroy that kind of record and play it way too fast, more than double

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 Post subject: Re: Rca 7-emp-2kk
PostPosted: Sep Wed 13, 2017 3:01 am 
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I was just testing it to see if it did anything. I didn't know anything about it at the time. I just assumed it played 33s. I think there's a 78 in the pile I got with it I'll give that a try.

My next question is if all I have are 33s and can't play them on this table is there a way to swap it out with one I can play 33s on?

Otherwise I might just leave it for decoration.


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 Post subject: Re: Rca 7-emp-2kk
PostPosted: Sep Wed 13, 2017 3:17 am 
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https://youtu.be/o2qfcpL72cs here's a video of it with the only 78 I think I've ever seen let alone owned lol


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 Post subject: Re: Rca 7-emp-2kk
PostPosted: Sep Wed 13, 2017 4:46 pm 
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Joined: May Thu 14, 2015 4:15 pm
Posts: 385
Location: Dallas, TX
Well, no use trying to play a record until you get the racket fixed. It sounds like a sewing machine to me! Also get it working manually first and then look into the automatic operation later.

It is possible in theory to switch out another changer, one that plays the other speeds, but it wouldn't be easy. If you found one that had the right dimensions you still would have the problem that the cutout for the old player wouldn't be right for the new one. Also the one you have uses a crystal cartridge, I think, so the replacement player would have to use a ceramic cartridge, I'd go with stereo cartridge. The crystal ones tend to go bad because moisture effects them with time. The most modern cartridges are magnetic however you would need to add a pre-amplifier between the cartridge and the existing amplifier. You would have to change the wiring plugs because the replacement player probably wouldn't used the same type. However I'm not an authority on old changers, someone here might know of a drop in replacement. Finding one is another matter.
You might want to change the title of this thread to the correct model and say " was RCA 7-emp-2kk".

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Tim
747, 465, 1230, 1471B, 2005A, 1075
C-3, SG-8, V-7A, TC-2P
LAG-27, LBO-517
5382A, 368, 260, 8024B


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 Post subject: Re: EDIT:: Thought I had a Rca 7-emp-2kk it's actually RP-1
PostPosted: Sep Wed 13, 2017 5:07 pm 
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Joined: Sep Sun 10, 2017 5:54 pm
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I think it would just be easier to Just keep this on actually and try to get it working. I don't think it operates manually.

https://youtu.be/P2fYDdztmSQ

Here's a link to a video of it operating like it's supposed to.

I'm googling trying to see what parts are even available for this turntable


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 Post subject: Re: EDIT:: Thought I had a Rca 7-emp-2kk it's actually RP-1
PostPosted: Sep Thu 14, 2017 2:02 am 
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Joined: May Thu 14, 2015 4:15 pm
Posts: 385
Location: Dallas, TX
It's great that you are going to see if you can fix it.
Nice job finding that video. I've seen that method that the changer uses to detect the end of the record used elsewhere, one place was on a wind-up Victrola. On the Victrola it activated a brake that stopped the platter from turning. I think he might of gotten it a little wrong however. I think it detects that the tonearm moves in reverse at times when it reaches the final circular groove, which is off center.

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Tim
747, 465, 1230, 1471B, 2005A, 1075
C-3, SG-8, V-7A, TC-2P
LAG-27, LBO-517
5382A, 368, 260, 8024B


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 Post subject: Re: EDIT:: Thought I had a Rca 7-emp-2kk it's actually RP-1
PostPosted: Sep Thu 14, 2017 2:58 am 
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Now I'm really curious how the changer part works... Does it somehow go from disc to disc if you stack them on or...?


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 Post subject: Re: EDIT:: Thought I had a Rca 7-emp-2kk it's actually RP-1
PostPosted: Sep Thu 14, 2017 3:24 am 
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Joined: May Thu 14, 2015 4:15 pm
Posts: 385
Location: Dallas, TX
19ashe86 wrote:
Now I'm really curious how the changer part works... Does it somehow go from disc to disc if you stack them on or...?

Yep, you would stack them on the centerpost.
https://midimagic.sgc-hosting.com/changers.htm

_________________
Tim
747, 465, 1230, 1471B, 2005A, 1075
C-3, SG-8, V-7A, TC-2P
LAG-27, LBO-517
5382A, 368, 260, 8024B


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 Post subject: Re: EDIT:: Thought I had a Rca 7-emp-2kk it's actually RP-1
PostPosted: Sep Thu 14, 2017 3:30 am 
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Joined: Sep Sun 10, 2017 5:54 pm
Posts: 10
Thanks for the link. I'm actually really interested in this kind of stuff now. It's interesting. I wonder how much it will cost to get mine running...


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