[NLRS] Would like to buy a 10Mhz reference... - response

[Jim Froemke]

Hi Gregg. Yes, you'll probably get a ton of responses to your question.
You didn't say which band that you needed the 10 MHz reference to work with
but, I assume it's your 2 meter transverter (rather than a 10 GHz
transverter). If so, than your accuracy and drift requirements are
relatively easy to solve. Some of your choices are:

	- Temperature stabilized oscillators within each transverter
	- GPS disciplined Oscillator
	- Rubidium reference
	- OXCO  

My choice (lowest cost and lowest complexity) would be just a 12 Volt OXCO
that you calibrate once a year (or before each event). I've been using this
solution with my station from 2 meters up through 10 GHz and it works well.
One thing that I've noticed is that I have to turn On the OXCO power first
and let it warm up for a minute or two before I turn on the synthesizer's
that use the 10 MHz  output. It probably wouldn't suffice for using digital
on 10 GHz but, I'll have to look into that. I use a DEMI 10X4
buffer/filter/fan-out box that allows the single 10 MHz OXCO to drive up to
4 separate devices. Most folks put their OXCO in an insulated box to shield
it from ambient temperature fluctuations. Some keep it powered-On 24 X 7 X
52 with a regulated 12 volt supply.
BTW, the purists will want to take you through extensive phase noise
discussions.

Let me know if and decide to go this way and have difficulty finding one.

73, Jim
K0MHC/rover

-----Original Message-----
From: nlrs-bounces at mailman.qth.net [mailto:nlrs-bounces at mailman.qth.net] On
Behalf Of Gregg Lind
Sent: Wednesday, November 13, 2013 4:54 PM
To: nlrs at mailman.qth.net
Subject: [NLRS] Would like to buy a 10Mhz reference...



I suspect that this group has many of these....

I am looking for a 10 Mhz reference I am new to VHF Rover activity and
happen to realize that I needed one this past June for the DEMI transverter
and was able to hack together a DDS solution this had its issues (bumped the
knob, and some drift). I want a plug it in and just have it work solution
(no programming needed). I am trying to minimize the issues I had from this
last roving event, and looking for simplicity I would like a low cost 12
volt input and get 10 Mhz out... Also I am looking for a cheaper solution I
am not planning anytime soon for 10 Ghz etc... .

If anyone has one that would like to sell I would appreciate it.. I am focus
on building other things for the rover, getting more power on 2 meters
etc,,,  so I just don't have the time to design/build ... Also I have to say
I am a software developer not a hardware person...

If there is a kit (beyond just a printed circuit board) that you would
recommend I found a number of them but I really don't want to order the
parts myself, It should be a complete kit with PWB/parts as this is a better
for me... If you have a link please send to me..

If there is something that you have built and do need any more this would be
great... I am willing to offer a fair price..

Gregg Lind
KC0SKM
gregg at thelinds.net
______________________________________________________________
NLRS mailing list
Home: http://mailman.qth.net/mailman/listinfo/nlrs
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:NLRS at mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html