Author Topic: Turntable safety cap  (Read 1268 times)

Offline scorpio333

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Turntable safety cap
« on: June 19, 2016, 10:15:10 PM »
My Dual 1229 and a new to me 721 both suffer from the dreaded POP through the speakers, the 1229 on shut down and the 721 on start up. Googled around and they need new X2 safety caps, 0.068F. The X2 seems important...and difficult to locate.

This is the correct one, but 19 weeks away:
http://www.digikey.com/product-detail/en/kemet/PME271M568MR30/399-7482-ND/3459436

This looks close, but is only X1:
http://www.mouser.com/ProductDetail/Kemet/PME271M568MR30/?qs=sGAEpiMZZMsh%252b1woXyUXj2IYAHSHjIQgjqF3wRWFJLU%3d

From what I gather the X2 is important because it carries 120v when the TT is plugged in and off. Anyone got a clue where I can grab a few of these?

Offline Sir Thrift-a-Lot

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Re: Turntable safety cap
« Reply #1 on: June 19, 2016, 10:24:49 PM »
I'm certainly not a tech or anything close, but if this cap is just to bleed AC, is the exact farad rating important?   Does Mouser or Digikey have X2s that are close to that rating?   Or two X2s that you could wire together to make that rating?   I'll be honest, I don't know what X2 designates, but I know farad values can be altered and or reached in various manners other than exact replacement.

Offline Sir Thrift-a-Lot

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Re: Turntable safety cap
« Reply #2 on: June 19, 2016, 10:29:14 PM »
I'm pretty sure that two of these (in parallel I think but one of the real tech guys can chime in on that) will get you there, and they are in stock...

http://www.digikey.com/product-search/en/capacitors/film-capacitors/131088?k=&pkeyword=&pv13=31&FV=ffecbb32&mnonly=0&newproducts=0&ColumnSort=0&page=1&quantity=0&ptm=0&fid=0&pageSize=25

Offline Sir Thrift-a-Lot

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Re: Turntable safety cap
« Reply #3 on: June 19, 2016, 10:31:25 PM »
Read the paragraph "Substituting for Unavailable Values" on this page.   I refer to this page with some frequency...

http://www.antiqueradio.org/recap.htm#identifying

Offline scorpio333

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Re: Turntable safety cap
« Reply #4 on: June 19, 2016, 10:39:56 PM »
.047's are said to work, but a couple people didn't eliminate the pop until they used .068. Furthermore, I'm an idiot...manufacture lead time is 19 weeks, they have them available to ship right away. I'm going to get a few and see what happens. Nothing like having the amp up around 2 o'clock on the dial and having the speakers pop because I forgot to turn it down.

Offline Sir Thrift-a-Lot

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Re: Turntable safety cap
« Reply #5 on: June 20, 2016, 12:12:58 AM »
Bookmark that page anyway.   You'll use it.

Offline ataudio

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Re: Turntable safety cap
« Reply #6 on: June 20, 2016, 12:30:41 AM »
I've taken them out of  old, unfixable stereo components. My latest one came out of a junk cassette deck.  Took another out of an old broken Magnavox CD player.  Look around and see if you have a doaner item available.

Offline Jim Pittsburgh

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Re: Turntable safety cap
« Reply #7 on: June 20, 2016, 07:48:24 AM »
I have two junk tables that I was saving for a DIY cleaner project... you are welcome to them
Clearaudio Performance SEP/Talisman V2 gold,PL XP-15, Onkyo Integra DSP 8.3, Marantz SR6005, KEF Reference 5, KEF Reference 4C,KEF Q900, , Q800, HSU VFT-15H,Emptek DSA250,Krell S1500 #2 Marantz SR6007,  McIntosh1501, KEF Q600, Sunfire NHTsuper1s, Technics 1200 MkII/ Shure V15 xMR, dbx DX5 ,Jolida JD

Offline scorpio333

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Re: Turntable safety cap
« Reply #8 on: June 20, 2016, 11:43:10 AM »
Didn't even think to transplant one from a donor. I've got a couple old parts tables, I'll try that. However, they're all of the same vintage so they could be bad as well. Jim, if the donors I have are bad I may take you up on that offer.

 

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