If you are still slow with the 10pF, a 12pF is not going to do it. The 
relationship between the crystal and load capacitor is critical, and it is 
therefore a mystery to me that so many (of the cheaper) are sold without the 
specifications. Anyway, if yours is a cheap Chinese crystal, try some other 
ones, perhaps you just got a bad one. Generally I always like to get a good 
brand name crystal. If you want to play with the one you have, try something 
lower yet, 8 or 7pF.

 

In general terms, and within limits, larger cap slows it down, smaller cap 
speeds it up. Sometimes (if you use 2 caps) using a slightly different cap on 
one leg of the crystal can make a difference in the final frequency.

 

Bill

 

From: [email protected] [mailto:[email protected]] On 
Behalf Of MrThe50sanchez
Sent: Monday, April 19, 2021 4:23 AM
To: neonixie-l <[email protected]>
Subject: [neonixie-l] CRISTAL + CAPACITOR = TIME DELAY HELP

 

Hello Guys! 

 

I have a nice question to ask you guys if you can give me some help.

 

I builded a Nixie watch, It works good, but I'm having a little bit of time 
delay, 1 min within 6 hours. 

 

At the first time, I had 6 min delay for 6 hours aproximately. I investigated 
the relation of the cristal and the capacitors you need to install with it. 
First, I had 22pF for a cristal that requires 12.5pF, giving me that 6 min 
delay for 6 hours, then, I realised these and installed 10Pf capacitor and the 
delay decreased to 1 minute for 6 hours, and I just ordered new capacitors of 
12pF to get more closer to the manufacture requires, So I imagine that the 
delay is gonna get less. 

 

·Is there any way to make this time delay shorter? 

·Do you recommend me a tipe of cristal that is really acurate to install on my 
watch?

 

 Thanks a lot nixie lover's 

 

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