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 Post subject: Turntable removal
PostPosted: Jul Sat 18, 2020 10:18 pm 
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Joined: Jul Sat 18, 2020 9:49 pm
Posts: 18
I’m new here. My grandmother gave me her Olympic 6-617 true base phono am combo. It works! I can’t get the platter off to replace the rubber parts so that the motor can actually turn it. Any help will be much appreciated. George from Tampa Florida.


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 Post subject: Re: Turntable removal
PostPosted: Jul Sun 19, 2020 12:00 am 
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Joined: Jan Mon 16, 2012 4:15 pm
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Location: Near Brandon, Iowa
https://www.radiomuseum.org/r/olympic_6_617.html. Can download this info free of charge but you are limited to three pages per day, a total of 10 pages in any 30-day period.

Often the platter is retained to the center spindle via a "C" clip that must be pried out. However, the photo of the turntable in the above link doesn't appear to show such a clip... if the platter just doesn't lift off, it is probably retained by a clip on the underside of the unit. You will need to remove the entire turntable (note retainer screw heads in two places at 12 and 6 o'clock) in order to remove the platter.

Prior to plugging in the set again you might want to replace (at least) the filter electrolytic capacitors.


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 Post subject: Re: Turntable removal
PostPosted: Jul Sun 19, 2020 12:10 am 
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Joined: Jul Sat 18, 2020 9:49 pm
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This is what it looks like from underneath. There was no c clamp on top.


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 Post subject: Re: Turntable removal
PostPosted: Jul Sun 19, 2020 12:14 am 
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Joined: Jul Sat 18, 2020 9:49 pm
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This is what it looks like from underneath. There was no c clamp on top.


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 Post subject: Re: Turntable removal
PostPosted: Jul Sun 19, 2020 12:37 am 
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Joined: May Thu 14, 2015 4:15 pm
Posts: 2348
Location: Dallas, TX
From your pictures it looks like a cross pin fits into slots in the end of the platter center boss.
The platter may be a press fit onto the shaft. The pin through the gear would keep the shaft from coming out. Try gently to use a small screwdriver to pry between the bottom of the platter boss and the bearing frame. The shaft could have a taper the fits a taper in the platter.
If the platter shaft (spindle) is solid and straight, another thing to try is to lift up on the platter while someone taps on the end of the spindle (top) with a small block of wood ( like a 4 inch piece of 2 X4).

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Tim
It's not the Destination, It's the Journey.


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 Post subject: Re: Turntable removal
PostPosted: Jul Sun 19, 2020 1:16 am 
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Joined: Jul Sat 18, 2020 9:49 pm
Posts: 18
Got it! The journey continues!


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 Post subject: Re: Turntable removal
PostPosted: Jul Sun 19, 2020 3:10 pm 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 2431
Location: Haledon NJ USA
I believe that is a Seeburg record changer. It may match one of these:
http://www.nostalgiaair.org/Resources/202/T0000202.htm


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 Post subject: Re: Turntable removal
PostPosted: Jul Sun 19, 2020 3:38 pm 
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Joined: Jul Sat 18, 2020 9:49 pm
Posts: 18
So it actually works and sounds great. Amazing. How would I go about finding new capacitors if I wishbto change them


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 Post subject: Re: Turntable removal
PostPosted: Jul Sun 19, 2020 9:34 pm 
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Joined: Feb Mon 06, 2012 7:24 pm
Posts: 2752
Location: Gold Country, (Stanislaus National Forest) California 95235
You mostly can't get the cans anymore.
Any one of a dozen online parts houses should have `em.

_________________
2 kinds of men/tape. Low Noise/Wide Range.
LN=kind. WR=abrasive. Engineers=same thing.


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 Post subject: Re: Turntable removal
PostPosted: Jul Sun 19, 2020 9:35 pm 
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Joined: May Thu 14, 2015 4:15 pm
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Location: Dallas, TX
Sal's Capacitor Corner advertised on the right side of the forum pages is used by many.
I tend to get mine form Mouser of DigiKey.
You should definitely replace at least the electrolytic capacitors.

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Tim
It's not the Destination, It's the Journey.


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 Post subject: Re: Turntable removal
PostPosted: Jul Mon 20, 2020 2:40 am 
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Joined: Jul Sat 18, 2020 9:49 pm
Posts: 18
I’m happy to replace them. Any advice on how?
Also, I don’t know how to operate the auto feature. How are you supposed to place the records on the metal holders?


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 Post subject: Re: Turntable removal
PostPosted: Jul Mon 20, 2020 3:32 am 
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Joined: Jan Wed 16, 2013 12:04 am
Posts: 1848
Location: 77001
Rockygeorge74 wrote:
I’m happy to replace them. Any advice on how?
Also, I don’t know how to operate the auto feature. How are you supposed to place the records on the metal holders?

Re: capacitor replacement.

This radio/amplifier circuit uses a power transformer.
If the electrolytic capacitors fail, you risk damage/destruction
of the power tranny.


You'll need to know how to read a schematic, and have
good soldering skills.
Hotwax

Free Olympic download here in Rider's Perpetual Vol 15 1945.
Parts list and schematic diagrams from pp. 313-317 of pdf file.
Note that old nomenclature of "condenser" for capacitor is used.

https://worldradiohistory.com/Rider-Manual.htm

Schematic a bit more modern in Sams Photofacts.
https://www.samswebsite.com
Plug in the model # 6-617 to find circuit schematic.

Basic info on capacitors:
https://www.justradios.com/captips.html

http://www.wjoe.com/capacitorinfo.htm


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 Post subject: Re: Turntable removal
PostPosted: Jul Mon 20, 2020 6:03 pm 
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Joined: May Thu 14, 2015 4:15 pm
Posts: 2348
Location: Dallas, TX
Here is a link to a free download of Rider's service info, including schematic and parts list.
http://www.nostalgiaair.org/pagesbymode ... 012689.pdf

lorenz200w posted a link where you can download the SAMS info.

Make note of the fact that this Rider's info does not have part designation numbers (like V2, C10, R7) like SAMS and most modern schematic have. if you post about about a part make sure you give enough info so others understand which part.
I count four electrolytic caps, all in the same case, in Rider's CO 158. 20uf, 10uf and 5uf all at 450V and 50uf at 25V. From the drawing of the chassis this looks to be a metal can mounted on the chassis top. Combination capacitors like this are just about impossible to find today and when you do they are very high priced. This capacitor should be replaced with four separate capacitors. If there is enough room, I would mount the new caps on the underside of the chassis and disconnect the old cap leaving it in place for appearance. Gutting the old cap and re-stuffing with the new ones can be done but it is a lot of work and I wouldn't recommend it for you first project.
https://www.antiqueradio.org/recap.htm
One other capacitor that might be a good idea to change, for safety's sake, is the 0.05uf 400V capacitor connected from one side of the power transformer primary to the chassis. If this capacitor shorts it can electrify the metal chassis and control shafts. This should be replaced with a "Y" safety rated capacitor, if they fail safety caps fail open. I would also reduce the value to 0.01uf.
https://www.justradios.com/safetytips.html

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Tim
It's not the Destination, It's the Journey.


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 Post subject: Re: Turntable removal
PostPosted: Jul Tue 21, 2020 4:58 pm 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 2431
Location: Haledon NJ USA
Rockygeorge74 wrote:
How are you supposed to place the records on the metal holders?


On the metal holders, you'll see markings for "10" and "12". To play a stack of 10-inch records, point the "10" towards the center spindle. To play a stack of 12-inch records, point the "12" towards the center spindle. To remove the stack of records after they play, turn the blades so they're out of the way.

Like most record changers of that era, it does not stop after playing the last record. It will repeat the last record until you stop it.


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 Post subject: Re: Turntable removal
PostPosted: Jul Wed 22, 2020 3:58 am 
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Joined: Jul Sat 18, 2020 9:49 pm
Posts: 18
Thank yo everyone. It is coming together. I really appreciate all your help. This was given to me by my grandmother. She gave it to me as she remembered playing it for me when I was about 10 years old or so. She passed away at 92 about 6 months ago and I have been itching to get it out.

So I did get it working, got the records to drop and for the auto mechanism to work!

A couple more questions:
How do I calibrate where the needle falls? Meaning where does it fall, before the record or after the first song starts?

Also, do you recommend rewiring the motor? If so any recommendations? I noticed the more records I put on it, eventually the motor slows down.

How many records is normal to stack? I am assuming a complete album?


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 Post subject: Re: Turntable removal
PostPosted: Jul Thu 23, 2020 10:40 pm 
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Joined: Feb Mon 06, 2012 7:24 pm
Posts: 2752
Location: Gold Country, (Stanislaus National Forest) California 95235
Rockygeorge74 wrote:
How many records is normal to stack?
I am assuming a complete album?
Maybe 6-8. The bigger albums like Hamlet or Othello or some such with 12-14 records apiece I think only a very few ``stack'' players could handle that many without bogging down. Guessing most people that liked long albums used the pick-up-load-remove-and set down type that got popularized in the 30s.

_________________
2 kinds of men/tape. Low Noise/Wide Range.
LN=kind. WR=abrasive. Engineers=same thing.


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 Post subject: Re: Turntable removal
PostPosted: Jul Fri 24, 2020 12:21 am 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 2431
Location: Haledon NJ USA
Most of these changers were rated for 12 10-inch records, or 10 12-inch records. I don't load my Seeburg model J quite that heavy, but it has no problem at all playing Rachmaninoff's 2nd Symphony on 6 12-inch records with a skinny hardware store o-ring on the idler wheel. Once the turntable is spinning, due to flywheel effect, it takes very little to keep it spinning, as long as the bearing the the center of the turntable is lubricated.

If the records that haven't dropped and played yet squeak on the spindle, rub a wax candle on the top part of the spindle.


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 Post subject: Re: Turntable removal
PostPosted: Jul Fri 24, 2020 6:18 pm 
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Joined: Jul Sat 18, 2020 9:49 pm
Posts: 18
Can someone advise what items 1,2 and 3 are?


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 Post subject: Re: Turntable removal
PostPosted: Jul Fri 24, 2020 7:08 pm 
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Joined: May Thu 14, 2015 4:15 pm
Posts: 2348
Location: Dallas, TX
#1 is a electrolytic capacitor, possibly a unit containing several capacitors in one case. It probably will need to be replaced. Most commonly by putting the new units underneath and leaving the old one for appearance.
There probably are other electrolytic capacitors underneath also.
#2 and #3 are IF transformers (also called IF filters). They look to be the type with adjustable capacitors on top so they probably won't suffer from the Silver-Mica-Disease.

_________________
Tim
It's not the Destination, It's the Journey.


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 Post subject: Re: Turntable removal
PostPosted: Jul Mon 27, 2020 1:59 pm 
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Joined: Jul Sat 18, 2020 9:49 pm
Posts: 18
I just ordered the replacement capacitors this weekend. Is it possible and or recommended to replace the item marked as #1 in my photo, the electrolytic combination capacitor with a single capacitor. The original values were 20, 10, 5 and 50 mfd. Is it recommended to replace with a single 50 Uf 450 v. If so how do I go about connecting the wires. The original wires contain a blue, red, green and yellow with a black as negative.


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