[time-nuts] 5MHz ocxo
Doug Ronald
doug at dougronald.com
Wed Jul 25 22:01:36 UTC 2012
And should you decide to upgrade, I have two Austron 1250A standards, (which
contain a 5 MHz OCXO), unused in original boxes, with service manual, for
sale at just $500 each. The voltage control is +/- 5 VDC.
I'm avoiding the fleabag site unless necessary...
-Doug Ronald
AE6SY
-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of Mark Spencer
Sent: Wednesday, July 25, 2012 2:49 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] 5MHz ocxo
This approach could also facilitate using a higher perfromance OCXO. This
is after all time nuts (: I'm surprised to hear how few 5 Mhz OCXO's are
avaliable on the bay right now. Earlier this year I picked up a nice
Wenzel 5 Mhz OCXO for <$100.00
--- On Wed, 7/25/12, Chuck Forsberg WA7KGX N2469R <caf at omen.com> wrote:
> From: Chuck Forsberg WA7KGX N2469R <caf at omen.com>
> Subject: Re: [time-nuts] 5MHz ocxo
> To: time-nuts at febo.com
> Received: Wednesday, July 25, 2012, 5:18 PM How about a 10 MHz OCXO
> and a divide by two chip? Maybe an op-amp to change and/or invert
> the control voltage?
>
> On 07/25/2012 02:05 PM, Paul Flinders wrote:
> > I've finally had chance to pull my Rapco 1804M GPS
> conditioned oscillator apart to try to debug it.
> >
> > To recap I bought this a few months ago from an ebay
> vendor. It was fine at first (for a few hours) although I needed a
> better antenna or better site for the one I have but the second chance
> I had to spend any time on the antenna the 1804M itself decided to
> develop a fault running for a few seconds then restarting the
> firmware.
> >
> > It looks like the ocxo has died - pulling it from the
> unit and running it stand alone produces a similar result, 10MHz
> output for a short while, then it dies.
> Presumably this is related to the oven heating up and a dry joint or
> something else that doesn't like getting warm/expanding.
> >
> > The ocxo in the Rapco is an HCD-66-SC 5MHz 12V unit.
> They are completely sealed and I doubt I could get into it without
> destroying it so repair seems out of the question.
> >
> > There is a UK supplier of HCD Research ocxo's and
> although the HCD-66 is clearly obsolete, a current unit - the HCD-660
> looks about the right spec
(http://www.golledge.com/docs/products/ocxos/hcd660.htm).
> However I'm pretty certain that if I have to "request a quote" the
> price will be beyond what I can afford to spend fixing the unit.
> >
> > The only 5MHz ocxo available on fleabay is a
> Symmetricomunit but the auction has no data on it, nor can I find any
> on the net. It's obvious from the photos though that there are a
> couple of extra pins compared with the
> HCD-66 so it wouldn't fit the PCB.
> >
> > Does anyone know where I might be able to locate a
> suitable (used) replacement?
> >
> >
> > _______________________________________________
> > time-nuts mailing list -- time-nuts at febo.com To unsubscribe, go to
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> > and follow the instructions there.
> >
>
> -- Chuck Forsberg WA7KGX N2469R caf at omen.com www.omen.com
> Developer of Industrial ZMODEM(Tm) for Embedded Applications
> Omen Technology Inc "The High
> Reliability Software"
> 10255 NW Old Cornelius Pass Portland OR
> 97231 503-614-0430
>
>
>
>
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