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 Post subject: Cap Replacement Elac Miracord 10
PostPosted: Mar Tue 14, 2017 5:54 pm 
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Joined: Feb Fri 03, 2017 5:28 am
Posts: 145
Location: Mikwaukee, WI 53207
Hi,
I am overhauling an Elac Turntable and feel I should replace the 55 year old capacitor.
Wondering if this is a "motor start", "motor run" or some other type.
Also wondering about the "+50 Ohm" marking on it.
It would be great if someone could recommend a replacement part.

Thanks in advance,

Joe Y


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Collecting audio gear and radios because I couldn't afford to buy it when I should have.
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 Post subject: Re: Cap Replacement Elac Miracord 10
PostPosted: Mar Tue 14, 2017 10:52 pm 
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Joined: Jan Tue 31, 2012 1:55 am
Posts: 12966
Location: Mountains of Mourne. Ireland.
Cornell Dubilier Electronics (CDE)→ 942C20S47K-F
0.047µF ±10% Film Capacitor 500V 2000V (2kV) Polypropylene (PP), Metallized Axial.

Type 942 round, axial film capacitors utilize a hybrid section design of polypropylene film, metal foils and metallized polypropylene dielectric to achieve both high peak current as well as superior rms current ratings. This series is ideal for high pulse operation and high peak current circuits.

https://www.vinylengine.com/turntable_f ... 18&t=83888

Elac miracord 10 & 10H service manual...
https://www.elektrotanya.com/cgi-bin/download2.cgi


Greg.


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 Post subject: Re: Cap Replacement Elac Miracord 10
PostPosted: Mar Wed 15, 2017 12:26 am 
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Joined: Feb Fri 03, 2017 5:28 am
Posts: 145
Location: Mikwaukee, WI 53207
egg wrote:
Cornell Dubilier Electronics (CDE)→ 942C20S47K-F
0.047µF ±10% Film Capacitor 500V 2000V (2kV) Polypropylene (PP), Metallized Axial.

Type 942 round, axial film capacitors utilize a hybrid section design of polypropylene film, metal foils and metallized polypropylene dielectric to achieve both high peak current as well as superior rms current ratings. This series is ideal for high pulse operation and high peak current circuits.

https://www.vinylengine.com/turntable_f ... 18&t=83888

Elac miracord 10 & 10H service manual...
https://www.elektrotanya.com/cgi-bin/download2.cgi


Greg.


Greg,

Thanks for the great information! This is just what I needed,
The link to the user manual is broken, but I'll poke around and try to find myself a copy.

Thanks again,

Joe Y.

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Collecting audio gear and radios because I couldn't afford to buy it when I should have.


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 Post subject: Re: Cap Replacement Elac Miracord 10
PostPosted: Mar Wed 15, 2017 1:18 am 
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Joined: Jan Tue 31, 2012 1:55 am
Posts: 12966
Location: Mountains of Mourne. Ireland.
Whoops... my bad.
this should work... :) https://www.elektrotanya.com/elac_mirac ... nload.html
Wait for the ...processing... notice to change to Get Manual ←it takes a while!

or... shoot me an email and I will send you a copy.

Greg


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 Post subject: Re: Cap Replacement Elac Miracord 10
PostPosted: Mar Wed 15, 2017 3:01 am 
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Joined: Sep Mon 16, 2013 2:42 am
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Location: Tucson, Arizona U.S.A.
As the schematic on the capacitor shows, it is a 0.05 uF capacitor in series with a 50 Ohm resistor. The capacitor suppresses an arc when the power switch opens and prevents a "pop" in the amplifier. The resistor limits the discharge current when the switch closes preventing the switch contacts from welding. If you can't find a similar unit, you can replace it with a capacitor and resistor in series.

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 Post subject: Re: Cap Replacement Elac Miracord 10
PostPosted: Mar Wed 15, 2017 1:44 pm 
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Joined: Feb Fri 03, 2017 5:28 am
Posts: 145
Location: Mikwaukee, WI 53207
Jim Mueller wrote:
As the schematic on the capacitor shows, it is a 0.05 uF capacitor in series with a 50 Ohm resistor. The capacitor suppresses an arc when the power switch opens and prevents a "pop" in the amplifier. The resistor limits the discharge current when the switch closes preventing the switch contacts from welding. If you can't find a similar unit, you can replace it with a capacitor and resistor in series.



Thanks Jim. I had a feeling this was the case. I recently ran into these capacitor-resistor combos in a Philco radio.

I'll just plan to install a cap and a resistor.

Thanks,
Joe Y.

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 Post subject: Re: Cap Replacement Elac Miracord 10
PostPosted: Mar Wed 15, 2017 4:40 pm 
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Joined: Feb Fri 13, 2009 5:09 am
Posts: 624
Location: Santa Clara, CA
I believe that arrangement of capacitor and resistor is commonly known as a "snubber", and as Jim noted, is for arc suppression. I'd leave it as is, unless you are getting a "pop" when the switch actuates...it's not doing any signal shaping.


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 Post subject: Re: Cap Replacement Elac Miracord 10
PostPosted: Mar Wed 11, 2020 2:48 pm 
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Joined: Oct Wed 02, 2019 3:21 pm
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What would be a suitable resistor wattage capacity value for this circuit?


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 Post subject: Re: Cap Replacement Elac Miracord 10
PostPosted: Mar Tue 17, 2020 8:06 am 
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Joined: Sep Thu 23, 2010 6:37 am
Posts: 12437
Location: Powell River BC Canada
If it is not doing what it should the contacts on the shutoff will be
arcing.

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