Author Topic: capacitor value tolerance in Kit Radio Pixie 40m cw qrp  (Read 731 times)

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Offline vinloveTopic starter

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capacitor value tolerance in Kit Radio Pixie 40m cw qrp
« on: July 19, 2019, 09:24:19 pm »
I am building Pixie 40m CW QRP kit from eBay. This kit was bought about 3-4 year ago, but was left in the drawer, and had been forgotten all this time.
I found it a few days ago while clearing out, and I thought  will have a go building it.
I soldered all the resistors on the board, and now its time to put on the capacitors.

The capacitor value for C1, C10 on the paper is 0.1uF (104).

But when I checked them with my DMM, their value is 65 pF.  I would think it is 0.065uF? which is about 35-40% off from the spec.?
Are these within the usable tolerance, or these caps have gone off? 

Thanks.

« Last Edit: July 19, 2019, 09:27:59 pm by vinlove »
 

Offline floobydust

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Re: capacitor value tolerance in Kit Radio Pixie 40m cw qrp
« Reply #1 on: July 20, 2019, 12:53:53 am »
Check your build, post a schematic or something
 

Offline vinloveTopic starter

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Re: capacitor value tolerance in Kit Radio Pixie 40m cw qrp
« Reply #2 on: July 20, 2019, 08:26:59 am »
On my sheet, both C1 and C10 is 0.1 uF (104).
 

Offline PA0PBZ

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Re: capacitor value tolerance in Kit Radio Pixie 40m cw qrp
« Reply #3 on: July 20, 2019, 09:43:29 am »
Both C1 and C10 are not critical, 0.1u (or 100n) would be fine in the schematic floobydust posted. But get your units correct: 65p is 0.065n = 0.000065u
My guess is that you are not measuring correctly, can you post a picture of the caps?

Keyboard error: Press F1 to continue.
 
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Offline vinloveTopic starter

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Re: capacitor value tolerance in Kit Radio Pixie 40m cw qrp
« Reply #4 on: July 20, 2019, 11:10:02 am »
Both C1 and C10 are not critical, 0.1u (or 100n) would be fine in the schematic floobydust posted. But get your units correct: 65p is 0.065n = 0.000065u
My guess is that you are not measuring correctly, can you post a picture of the caps?

I was using 3x different DMMs for the measurement, and they all showed same figures, but I think I wrote wrong on my OP. It must be 65nP, not pF.

I will check it again and update later.
 

Offline PA0PBZ

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Re: capacitor value tolerance in Kit Radio Pixie 40m cw qrp
« Reply #5 on: July 20, 2019, 12:06:49 pm »
65nF should not be a problem in the above schematic.

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Offline vinloveTopic starter

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Re: capacitor value tolerance in Kit Radio Pixie 40m cw qrp
« Reply #6 on: July 20, 2019, 02:05:06 pm »
65nF should not be a problem in the above schematic.

Thank you for your confirmation. :):-+
 


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