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KD7NKN
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Post subject: Capacitor Questions Posted: Feb Wed 07, 2018 4:48 pm |
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Joined: Nov Tue 08, 2016 5:59 pm Posts: 88 Location: Aurora, OR 97002
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Another in the series of Newbie questions brought to you by...me.
I'm working on a Hallicrafters S-38B. I've got the paper caps replaced and installed a polarized plug. It works great, but I'd like to make sure before I button it up, I've done all I can.
I've run across a few domino caps but most of them are mica so I'm not too worried about them. However, there's one type I've never seen before. The body color is a light clay color. It's attached to two high accuracy resistors. I've upload a picture for your perusal. Is this a paper cap as well? Replace?
Secondly, there's a multi-capacitor package that I'm not sure I should replace (also pictured below.) My understanding is that it's a ceramic package so might not need to be replaced. Opinions?
Thanks to you all for your kind help through the years!
Best,
Cliff
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IMG_2270 (2).jpg [ 22.51 KiB | Viewed 1292 times ]
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IMG_2271 (2).jpg [ 21.44 KiB | Viewed 1292 times ]
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simplex1040
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Post subject: Re: Capacitor Questions Posted: Feb Wed 07, 2018 4:53 pm |
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Joined: Jan Thu 01, 1970 1:00 am Posts: 7667 Location: 42001 KY
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If it were me, I would leave both alone. Your set is working.
_________________ ... .. --. -. .- - ..- .-. .
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egg
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Post subject: Re: Capacitor Questions Posted: Feb Wed 07, 2018 6:04 pm |
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Joined: Jan Tue 31, 2012 1:55 am Posts: 15349 Location: Mountains of Mourne. Ireland.
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Hallicrafters part number-46A151 is a four-section ceramic capacitor/s. Known, back in the day as a... PEC (printed electronic circuit) or Couplate.  C11A C11B C11C and C11D 5000pF 220pF 220pF and 2000pf should be in the parts list ... Greg.
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pixellany
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Post subject: Re: Capacitor Questions Posted: Feb Wed 07, 2018 6:12 pm |
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Joined: Jul Mon 26, 2010 8:30 pm Posts: 29184 Location: Annapolis, MD
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electrolytics replaced?
_________________ -Mark "Voltage is fun to watch, but it's the CURRENT that does the work."
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KD7NKN
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Post subject: Re: Capacitor Questions Posted: Feb Wed 07, 2018 8:16 pm |
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Joined: Nov Tue 08, 2016 5:59 pm Posts: 88 Location: Aurora, OR 97002
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Yes, the electrolytics have been replaced.
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KD7NKN
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Post subject: Re: Capacitor Questions Posted: Feb Wed 07, 2018 8:18 pm |
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Joined: Nov Tue 08, 2016 5:59 pm Posts: 88 Location: Aurora, OR 97002
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Yes, the PEC is in the parts list, but should it be replaced?
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Michael Simos
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Post subject: Re: Capacitor Questions Posted: Feb Wed 07, 2018 8:28 pm |
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Joined: Jan Thu 01, 1970 1:00 am Posts: 603 Location: Merrick,NY,USA
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I wouldn't replace the PEC couplate. Those caps are ceramic and should be fine.
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Notimetolooz
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Post subject: Re: Capacitor Questions Posted: Feb Thu 08, 2018 5:26 pm |
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Joined: May Thu 14, 2015 4:15 pm Posts: 2815 Location: Dallas, TX
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As simplex1040 said, just leave it as it is. If the domino cap is attached to tight tolerance resistors it is unlikely to be a paper or similar. Since the PEC, couplate, is all capacitors it should be fine. The couplates that also contain resistors sometime have drifted resistor, I think this is because the process of manufacture is a compromise. Many times those have connection such as you can't measure all the components.
_________________ Tim It's not the Destination, It's the Journey.
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