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What to do with a digital clock

 
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stoyan
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PostPosted: Tue Jun 22, 2004 11:03 am    Post subject: What to do with a digital clock Reply with quote
it gains 1 min/hour .
It has IC PCF1175CT and quartz, but no correction trimmer.
I have heard that one can solder two insulted wires in parallel of the quartz and they are twisted to adjust the gain.
Is this true? How thick the wires should be ?
Please help.
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Guest
PostPosted: Fri Oct 08, 2004 5:05 pm    Post subject: Re: What to do with a digital clock Reply with quote
stoyan wrote:
it gains 1 min/hour .
It has IC PCF1175CT and quartz, but no correction trimmer.
I have heard that one can solder two insulted wires in parallel of the quartz and they are twisted to adjust the gain.
Is this true? How thick the wires should be ?
Please help.
You may change its quartz xtal .( check its freq. 32768Hzs) These are easily available.
With rgds.
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jim chuang
Guest
PostPosted: Tue Sep 19, 2006 2:42 pm    Post subject: Re: What to do with a digital clock Reply with quote
Anonymous wrote:
stoyan wrote:
it gains 1 min/hour .
It has IC PCF1175CT and quartz, but no correction trimmer.
I have heard that one can solder two insulted wires in parallel of the quartz and they are twisted to adjust the gain.
Is this true? How thick the wires should be ?
Please help.
You may change its quartz xtal .( check its freq. 32768Hzs) These are easily available.
With rgds.


We use a 4.194304MHz crystal, how should we do? Do we use a wrong crystal?
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RODALCO



Joined: 28 Oct 2006
Posts: 30
Location: Auckland - New Zealand
PostPosted: Sat Mar 03, 2007 9:57 am    Post subject: Reply with quote
Check it's frequency with a freq counter, it is usually stamped on the can.
It may have drifted or the variable capacitor is faulty.

Crystals are cheap to get and under US$ 4.
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