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Author Topic: Do Xtals have a direction  (Read 3649 times)

tigertiger

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Do Xtals have a direction
« on: December 19, 2008, 05:31:07 am »
On my Tx I can plug in the Xtals in either direction.

Does it matter?
I read somewhere once that it does, buy am not sure if this is correct.
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Martin (Admin)

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Re: Do Xtals have a direction
« Reply #1 on: December 19, 2008, 06:16:09 am »
I believe they are a "passive" component so no.
I've never seen a crystal with any markings on the legs....
If it works better one way than the other, I would suggest you have a dodgy crystal.

http://www.kvg-gmbh.de/index.php?id=72&L=3
http://www.ieee-uffc.org/freqcontrol/quartz/vig/vigequiv.htm
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andyn

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Re: Do Xtals have a direction
« Reply #2 on: December 19, 2008, 02:18:11 pm »
No  %)

Shortest answer I could manage...
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Stavros

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Re: Do Xtals have a direction
« Reply #3 on: December 19, 2008, 08:06:41 pm »
Do you mean 180m degrees around or do you mean TX in Rx and vise versa if the latter sometimes it will work but it creates its own frequency!!!!!!!!!!!


Stavros
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tigertiger

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Re: Do Xtals have a direction
« Reply #4 on: December 20, 2008, 12:43:10 am »
Hi Dave

I meant 180 degrees.

I believe that Tx to Rx is a big No! No!

Say Merry Xmas to the gang for me.
And a big Hello to Margret
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BobF

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Re: Do Xtals have a direction
« Reply #5 on: December 20, 2008, 05:27:26 pm »
Although probably technically illeagle as no frequency flag colour, in the old days (late sixties early seventies) we often used them the other way round.
It helped to stop interference problems between receivers, when two people were sailing.
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Stavros

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Re: Do Xtals have a direction
« Reply #6 on: December 20, 2008, 06:23:24 pm »
Quote from: tigertiger on December 20, 2008, 12:43:10 am
Hi Dave

I meant 180 degrees.

I believe that Tx to Rx is a big No! No!

Say Merry Xmas to the gang for me.
And a big Hello to Margret

Will do I dont think it matters which way around they go in the tx or rx



Stavros
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tomocj

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Re: Do Xtals have a direction
« Reply #7 on: January 26, 2009, 05:02:25 pm »
no you can use them either way round, as long as tx is a tx crystal and rx is a rx crystal.
chris
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Seaspray

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Re: Do Xtals have a direction
« Reply #8 on: January 26, 2009, 05:58:08 pm »
they just give the frequency to the circuit  either way does. But don't use a Tx (transmitter) crystal on an Rx (reciever) or visa versa.


Seaspray
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Ghost in the shell

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Re: Do Xtals have a direction
« Reply #9 on: January 26, 2009, 06:15:24 pm »
tiggsy, happy chinese new year.

in relation to your query, as long as the tx xtal is in the tx, and the rx xtal is in the rx, it doesnt really matter.
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tomocj

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Re: Do Xtals have a direction
« Reply #10 on: February 07, 2009, 04:14:34 pm »
I agree with Andyn 'NO' any way round will do.Chris

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