Capacitor on the clock hot lead
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I'm getting things sorted for putting my fascia back together so I got out all the instruments to clean them up and change the pitted bezels. In doing that I found a 1 micro farad, 150V DC capacitor across the hot lead of the clock. Strange place to put it, but I'm assuming it's for radio noise suppression. It doesn't show in the wiring diagrams, at least that I can find. Anyone have any knowledge on it's purpose?
Bud
1970 +2S Fed 0053N
"Winnemucca - says it all really!!"
1970 +2S Fed 0053N
"Winnemucca - says it all really!!"
- Bud English
- Coveted Fifth Gear
- Posts: 1081
- Joined: 05 Nov 2011
Hi Bud.
It has been fitted I guess for radio suppression . If you have the Kienzle clock these are basically clockwork mechanisms with an electric rewinder that takes a big pulse of current (~1A). When the current is turned off as the
clock rewinds interrupting this current this results ( in radio noise terms) a potentially large interfering pulse around once a minute. so maybe the capacitor was fitted to try and suppres a click pulse on the radio. Should not be any
problem to keep it in circuit.
hope this helps best of luck
Bob
It has been fitted I guess for radio suppression . If you have the Kienzle clock these are basically clockwork mechanisms with an electric rewinder that takes a big pulse of current (~1A). When the current is turned off as the
clock rewinds interrupting this current this results ( in radio noise terms) a potentially large interfering pulse around once a minute. so maybe the capacitor was fitted to try and suppres a click pulse on the radio. Should not be any
problem to keep it in circuit.
hope this helps best of luck
Bob
- bob_rich
- Fourth Gear
- Posts: 564
- Joined: 06 Aug 2009
Thanks guys. That makes sense after reading a thread on how the clock works, here. http://www.oldclassiccar.co.uk/forum/ph ... hp?t=10488, as posted by draenog here on this forum.
In searching, I never found a reference to the capacitor, but from your replies it sounds like they were added after the fact.
I'm not sure an electrolytic capacitor would still be viable after sitting unused as long as that one has. I'll leave it though and if the noise presents itself it will be fairly easy to swap out. Thanks again.
In searching, I never found a reference to the capacitor, but from your replies it sounds like they were added after the fact.
I'm not sure an electrolytic capacitor would still be viable after sitting unused as long as that one has. I'll leave it though and if the noise presents itself it will be fairly easy to swap out. Thanks again.
Bud
1970 +2S Fed 0053N
"Winnemucca - says it all really!!"
1970 +2S Fed 0053N
"Winnemucca - says it all really!!"
- Bud English
- Coveted Fifth Gear
- Posts: 1081
- Joined: 05 Nov 2011
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