Special connector for Symmetricom X72 rubidium standard
I'm going to buy enough boards to get them for a decent price... way lower than you can have them built for. Will also probably do them with a kit of parts.
RDR Electronics has SA22's for not much more than the X72. The problem with SA22's is the connector. It is a dual row 18 pin connector with 2mm pitch. It is on the bottom of the box where you want to mount the heatsink. Not sure how one would mount it so that the full surface is on the heatsink. It looks like they use a mating SMD PCB mounted connector.
So if he had finished his board I would be happy to
get the sources to get some ordered at my local PCB manufacturer.
I think that brings the best options for future use of the X72
oscillator which seems to be a very good small rubidium oscillator
nowerdays. SA22.c oscillators are not so spread over the known used-item
reseller sources and if yes they are quite expensive to buy.
Hi
A lot of the OEM’s seem to be going with a large multi layer PCB as the “heatsink” for
the lightweight Rb’s. Apparently they have enough airflow through their racks that this
works ok for them. In that case, I think I’d prefer some sort of “cheap” SMD PC mount
connector. Faster to assemble that way …..those nickels add up quick :)
Bob
On Aug 21, 2017, at 10:56 AM, Mark Sims holrum@hotmail.com wrote:
I'm going to buy enough boards to get them for a decent price... way lower than you can have them built for. Will also probably do them with a kit of parts.
RDR Electronics has SA22's for not much more than the X72. The problem with SA22's is the connector. It is a dual row 18 pin connector with 2mm pitch. It is on the bottom of the box where you want to mount the heatsink. Not sure how one would mount it so that the full surface is on the heatsink. It looks like they use a mating SMD PCB mounted connector.
So if he had finished his board I would be happy to
get the sources to get some ordered at my local PCB manufacturer.
I think that brings the best options for future use of the X72
oscillator which seems to be a very good small rubidium oscillator
nowerdays. SA22.c oscillators are not so spread over the known used-item
reseller sources and if yes they are quite expensive to buy.
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On Mon, 21 Aug 2017 14:56:20 +0000
Mark Sims holrum@hotmail.com wrote:
RDR Electronics has SA22's for not much more than the X72.
The problem with SA22's is the connector. It is a dual row 18 pin
connector with 2mm pitch.
At least you can get 2mm header pins quite easily. But yes, I have the
same problem. I have an SA22 sitting on my desk that waits for
an adapter board.
It is on the bottom of the box where you want
to mount the heatsink. Not sure how one would mount it so that the full
surface is on the heatsink. It looks like they use a mating SMD PCB
mounted connector.
In one of the documentation, they specified a few ways how to
mount it on a heatsink. They all boil down to having the heatsink
only in the back part and the adapter PCB in the front part.
Attila Kinali
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