[time-nuts] Are there any rubidiums programmahttps://mail.google.com/mail/?shva=1#inboxble to 40 MHz?

Rex rexa at sonic.net
Tue Mar 26 01:21:32 EDT 2013

Please tell us if I am parsing the content of your message correctly 
with my inserted comments.

On 3/25/2013 9:09 AM, Stan, W1LE wrote:
> Hello Dave,
> The problem I experienced with a Rb at 10 MHz stabilizing a AD6IW PLL 
> at 106.5 MHz
> for a DB6NT 10 GHz G2 transverter,
I assume by "stabilizing" you mean that the rubidium was providing the 
reference frequency to the PLL.

> was the significant microphonics after multiplication.
> The original xtal oscillator did not have microphonics, but would drift.
> My solution was to add a ISO-Temp 10 MHz OCXO as  a reference to the PLL.
By "add" I think you mean replace, as in, the rubidium is no longer used 
but the OCXO has replaced it as the PLL's reference. If you really meant 
add, that would imply that somehow the rubidium is disciplining the 10 

> This provided me with the frequency accuracy and stability
> needed for a weekend of microwave contesting, USB/CW
> My 10 GHz operation is portable and I rove.
> Stan, W1LE    Cape Cod   FN41sr
> On 3/25/2013 10:17 AM, David Kirkby wrote:
>> I'm possibly looking for a 40 MHz source and I know some of the
>> rubidiums are programmable. But can any of the affordable ones be
>> programmed to work at 40.0 MHz?
>> I was looking for a source to drive this 144 MHz -> 10 GHz transceiver.
>> http://www.chris-bartram.co.uk/products.html
>> The TCXO oscillator is off the board and a separate item, but costs
>> £40 and then one ideally wants to lock that to a more precise source.
>> The oscillator will lock to an external 10 MHz source, but then one
>> needs to buy both a 10 MHz rubidium as well as this 40 MHz TCXO. Hence
>> I was wondering if there was a cheaper more compact solution, which
>> just used a rubidium, and dispensed with a TCXO.
>> Dave

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