Hi, I have this "NYCE FC-155S" frequency counter and meter but the frequency readout is way off.
The trimmer cap that should adjust it has went pretty erratic (tried switch cleaner). Can anyone hazard a guess at the value of a replacement? No markings on the component itself..
What Value of Trimmer Capacitor?
- sickboy
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What Value of Trimmer Capacitor?
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- dt307
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Re: What Value of Trimmer Capacitor?
No idea but if it was mine
Try a red trimmer from an old CB about 2-20pf
If you find its not enough a green trimmer 6-30pf
Just put a fixed value in to temp get the amount you need. So say you put 20pf and the meter is close to where it needs to be then a ceramic trimmer that's around 10-30pf give or take will do.
Or you could use a fixed value of 10pf in parallel with a red trimmer that would give you the range of 12-30pf
Try a red trimmer from an old CB about 2-20pf
If you find its not enough a green trimmer 6-30pf
Just put a fixed value in to temp get the amount you need. So say you put 20pf and the meter is close to where it needs to be then a ceramic trimmer that's around 10-30pf give or take will do.
Or you could use a fixed value of 10pf in parallel with a red trimmer that would give you the range of 12-30pf
163dt307-chris
“I fear the day that technology will surpass our human interaction. The world will have a generation of idiots.”
― Albert Einstein
“I fear the day that technology will surpass our human interaction. The world will have a generation of idiots.”
― Albert Einstein
- sickboy
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Re: What Value of Trimmer Capacitor?
Thanks Chris, helpful as always!
Cheers!
Cheers!
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- DX-Digger
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Re: What Value of Trimmer Capacitor?
Not sure why it would need such a beefy trimmer, is it sampling RF through it or is it just pulling a reference xtal?
In which case it could be the xtal that's past its sell by date. A circuit diagram would help.
Try what Chris suggested but do it on low power.
In which case it could be the xtal that's past its sell by date. A circuit diagram would help.
Try what Chris suggested but do it on low power.
ʎɐqǝ uo pɹɐoqʎǝʞ ɐ ʎnq ı ǝɯıʇ ʇsɐן ǝɥʇ sı sıɥʇ
- sickboy
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Re: What Value of Trimmer Capacitor?
DX-Digger wrote:Not sure why it would need such a beefy trimmer, is it sampling RF through it or is it just pulling a reference xtal?
In which case it could be the xtal that's past its sell by date. A circuit diagram would help.
Try what Chris suggested but do it on low power.
Thanks, yes there's a 10.00MHz crystal connected to the trimmer. I'll swap that out as well, thanks for the help
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- cb4ever104
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Re: What Value of Trimmer Capacitor?
That's what I have done in the past . Once you know the rough value then just buy a variable that covers it .dt307 wrote:Just put a fixed value in to temp get the amount you need.
S.
30TM060
Paul aka "Sammy". (108) PY60 Old Paisley DX Group (RIP Rab Markie)
Ex GM0 , now EA5 .
Handle "Fortune Hunter" back in "the day"
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Paul aka "Sammy". (108) PY60 Old Paisley DX Group (RIP Rab Markie)
Ex GM0 , now EA5 .
Handle "Fortune Hunter" back in "the day"
Radios ....? Anything that says "TAIWAN R.O.C" on the back.
- sickboy
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Re: What Value of Trimmer Capacitor?
Thanks again lads. Nipped into Maplin for a 10MHz crystal, then used a 15pf cap and a red trimmer from scrap board, and that's the meter back in service.
Really appreciate the advice
Really appreciate the advice
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- dt307
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Re: What Value of Trimmer Capacitor?
love a happy ending .......
only the flux left to clean off
only the flux left to clean off
163dt307-chris
“I fear the day that technology will surpass our human interaction. The world will have a generation of idiots.”
― Albert Einstein
“I fear the day that technology will surpass our human interaction. The world will have a generation of idiots.”
― Albert Einstein