[time-nuts] What sort of oscillator is this?

[Jim Lux]

On 9/30/14, 4:56 PM, Dr. David Kirkby (Kirkby Microwave Ltd) wrote:
> On 30 Sep 2014 14:16, "Jim Lux" <jimlux at earthlink.net> wrote:
>>
>> On 9/30/14, 12:44 AM, REEVES Paul wrote:
>>>
>>> David,
>>>
>>> Just a thought but have you tried Pasternack? They do 'custom' precision
> cabling including 2.4mm connector options.
>>>
>>> regards,
>>>
>>> Paul,   G8GJA
>>>
>> Rather than Pasternack, you might find the following sources useful
>
> I got a quote from Pasternack today. They can't do 20 GHz in SMA so
> suggested 3.5 mm, which would be fine.  They actually quited for 2.92 mm on
> the other end, whereas I need 2.4 mm, but the price was the US equivalent
> of about $220/cable.
>
>> Citrus Cables does nice quality, inexpensive work, and they have oddball
> stuff like MMCX if you need it.  I use them for general purpose jumpers a
> lot.
>> http://www.citruscables.com or http://www.citruscables.biz
>
> They don't seem to do the high precision stuff. They have things like BNC
> and reverse SMA, but I don't see 2.4 mm.

You might send them an email and ask. They've kind of got two sides to 
the business.

>
>> RFCoax - I use them for semi-rigid and formable type cables
>> http://rfcoax.com
>
> Someone else suggested them.
>
> They do what I want,  and the price is much lower than Pasternack. $85-$95
> depending on the length,  and that includes test data. I would feel a bit
> happier paying $5 extra for test data.  Hopefully it means that they really
> are tested!
>
> They also do the really high frequency 1.0 mm connectors, so it gives me
> some confidence that they are serious about cables.
>
I've been very happy with the cables we've gotten from RF Coax. We do a 
lot at 32 and 34 GHz, and yes, getting the test data for the cables is nice.

Their turnaround is relatively fast, too.



>> Tensolite (part of Carlisle)
>> http://www.carlisleit.com/products/assemblies/rfmicrowave-assemblies
>> Formable semirigid
>>
>> Axon
>> http://www.axon-cable.com
>> These guys are in the UK, and they have very low loss cable. I don't know
> about one-off assemblies.
>
> I will ask.
>
> I am certain that this mod will degrade the dynamic range,  but when it was
> calibrated,  it exceeded the spec by about 8 dB, so a bit of loss can be
> tolerated.  But the benefits far outweigh that.
>
> Dave.
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