[time-nuts] 5MHz ocxo

[Doug Ronald]

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?
> > 
> > 
> > _______________________________________________
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> > 
> 
> -- 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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