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Saber III - 8KHz off frequency

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g8tzl2004
Posts: 1123
Joined: Wed Sep 08, 2004 10:13 am

Saber III - 8KHz off frequency

Postby g8tzl2004 » Sat Aug 17, 2013 3:51 am

I have a UHF Saber III which is about 8KHz off frequency on TX. Its also way off on RX.

I have other UHF Motorola radios which have been around 3 KHz off frequency and I have been able to warp the ref frequency to get them spot on. But 8 KHz seems a long way off frequency.

Does 8 KHz off frequency suggest a problem?

Maybe its dirty contacts/thru pins like with the GM300?

Or is it just the ref crystal which needs warping back on frequency?

Any views?

Thanks

g8tzl2004
Posts: 1123
Joined: Wed Sep 08, 2004 10:13 am

Re: Saber III - 8KHz off frequency

Postby g8tzl2004 » Fri Aug 23, 2013 1:12 pm

Any thoughts?

Is 8 Khz off frequency on a UHF Saber III more than just normal ref crystal drift?

DJP126
Posts: 866
Joined: Wed Jun 18, 2003 6:41 am
What radios do you own?: What's a radio?

Re: Saber III - 8KHz off frequency

Postby DJP126 » Fri Aug 23, 2013 7:03 pm

Did you try swapping out the ref osc with one from one of your other sabers?
Dave

g8tzl2004
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Joined: Wed Sep 08, 2004 10:13 am

Re: Saber III - 8KHz off frequency

Postby g8tzl2004 » Fri Aug 23, 2013 10:13 pm

Not yet - I was thinking of using it as a donar radio - I have already removed the positive terminal to use on another radio but I've now found an old Saber case I was once given so I can use the positive terminal off that - so I'm thinking whether I can get the 8KHz off frequency radio operational.

8 KHz of frequency seems like too much...although 2.7KHz off freq at VHF is the same as 8 KHz at UHF...so maybe I can warp it back onto freq???

How easy is it to remove the ref osc module?

Can I also easily remove the PA module?

Thanks

DJP126
Posts: 866
Joined: Wed Jun 18, 2003 6:41 am
What radios do you own?: What's a radio?

Re: Saber III - 8KHz off frequency

Postby DJP126 » Sat Aug 24, 2013 5:44 am

All the parts on the saber series are plug in modules. Some have screws holding them in, some don't.
Dave

g8tzl2004
Posts: 1123
Joined: Wed Sep 08, 2004 10:13 am

Re: Saber III - 8KHz off frequency

Postby g8tzl2004 » Sat Aug 24, 2013 8:44 am

Thanks

Is 8 KHz off freq a fault or just due to crystal drift which can be re-warped back onto freq?

AEC
No Longer Registered
Posts: 1889
Joined: Wed Dec 22, 2004 7:56 pm

Re: Saber III - 8KHz off frequency

Postby AEC » Sat Aug 24, 2013 10:02 am

You can't adjust the reference oscillator that much, an error of this magnitude is NOT correctable by software, you will probably need to replace the oscillator.

GlennD
Posts: 482
Joined: Tue Jun 15, 2004 8:00 am

Re: Saber III - 8KHz off frequency

Postby GlennD » Mon Aug 26, 2013 8:04 am

I still have a drawer of reference oscillators. PM me your address and I will send you a couple.


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