[time-nuts] Oscillator frequency?

Alan Melia alan.melia at btinternet.com
Wed Oct 3 14:42:21 EDT 2012


5.12MHz is  often used as the reference for PLL channelised radio receivers.

Alan G3NYK

----- Original Message ----- 
From: "Don Latham" <djl at montana.com>
To: "Discussion of precise time and frequency measurement" 
<time-nuts at febo.com>
Sent: Wednesday, October 03, 2012 6:28 PM
Subject: Re: [time-nuts] Oscillator frequency?


> Hi Ken: I have two of these, and had the same problem some years ago
> (see archives time-nuts). Nothing seemed to need this frequency. Fast
> forward to present. I'm using an ICOM 260A 2m all-mode xceiver for if in
> a 13 cm moonbounce system. The xtal frequency for the basic synthesizer
> in these units is 5.12 MHz. I played around with the idea of separate
> better xtals, until one day I was cleaning out. DOH! I now have a use
> for those weird OCXO's!
> Soooooo... never throw anything away, and never dismay, for all weird
> stuff WILL be useful someday. There's a coarse adjustment of some kind
> on these units.
> 73, Don AJ7LL
>
> ken johnson
>> Hi, I have a tcxo that I recovered from a very old, suitcase-sized gps
>> receiver some years ago. The oscillator is marked "ERC
>> Eros-750-MA110", with an output frequency of 5.119155MHz. I have tried
>> to think of a use for for it but failed. I played with the numbers but
>> could not find anything useful, so I thought I would try the
>> collective wisdom of the list to see if anyone could come up with a
>> use for such an oddball frequency.
>>
>> As an aside, it was fascinating to see a gps in discrete components,
>> lots of mixers (I recovered no less than 10, MCL ASK1 mixers and there
>> are still several left on the boards) on something like 7 or 8 , 200mm
>> square, gold-plated plug-in boards on a very nice card frame with
>> many, many interconnecting small-diameter coaxes with gold-plated
>> connectors.
>>
>> Pity I wasn't interested in time-nuttery at the time, it probably
>> worked before I reduced it to component parts!
>>
>> Thanks, Ken
>> www.vk7krj.com
>>
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>
>
> -- 
> "Neither the voice of authority nor the weight of reason and argument
> are as significant as experiment, for thence comes quiet to the mind."
> De Erroribus Medicorum, R. Bacon, 13th century.
> "If you don't know what it is, don't poke it."
> Ghost in the Shell
>
>
> Dr. Don Latham AJ7LL
> Six Mile Systems LLP
> 17850 Six Mile Road
> POB 134
> Huson, MT, 59846
> VOX 406-626-4304
> www.lightningforensics.com
> www.sixmilesystems.com
>
>
>
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