On 08/11/2017 06:26 PM, Tom Van Baak wrote:
The E911 installation, in the news, is just one of several. Others are
hospitals,
fire stations, etc. using different dispatch systems.
Hey, at least important things like mobile phones, ISP's, Google, Amazon, FedEx
and Starbucks aren't affected ;
I'm interested in a piece or two if you do this. Happy to review
schematics and layout, too. -- Christopher AI6KG
On Tue, Aug 15, 2017 at 8:28 AM, Mark Sims wrote:
> Symmetricom sold some interface boards for the X72. They are 0.32-ish
> inch thick PCB's with a dual sided edge tab patter
Chris,
One source of that connector is an HP C8231A cable for a Deskjet 450.
It's used to connect the printer to a DB-25 parallel port. The connector
fits the X72, but there are only 25 leads in the cable. I haven't tried
to use it so I don't know if the missing lead is important or not. Th
I'm leaning more towards a two board solution now. A small 0.032" board that
breaks out the X72 connector to a standard 26 pin ribbon cable header and a
larger 0.062" board with the BNC's and RS-232 interface.
This should provide a more robust solution that offers better mounting options.
On Thu, 17 Aug 2017 13:05:47 -0600
Ed Palmer wrote:
> One source of that connector is an HP C8231A cable for a Deskjet 450.
> It's used to connect the printer to a DB-25 parallel port. The connector
> fits the X72, but there are only 25 leads in the cable. I haven't tried
> to use it so I do
I have noticed, of late, several used 80MHz OCXOs for sale. Is there a
particular industry that uses 80MHz as a typical reference freq?
I'm sure there's a reason why it is 80 vs. 100 or 10 or 5.. I just don't
know what it is.
-Brian
___
time-nut
Cable has a DB-25 on the other end. X72 uses 26 pins. So logically it would
be pin 26 that is missing... 10 MHz sine wave output... nobody needs that
one now, do they?
> If you have it open, can you tell which is the pin that's missing?
Maybe that one isn't needed and thu
Hi
10 MHz sine output would be pretty high up on my list of “pins to send
someplace else …”
Bob
> On Aug 17, 2017, at 5:36 PM, Mark Sims wrote:
>
> Cable has a DB-25 on the other end. X72 uses 26 pins. So logically it would
> be pin 26 that is missing... 10 MHz sine wave output... nobod
I did some more work on the HP printer cable that uses this connector.
Here's what I found:
1. Pin 25 on the X72 connector is unconnected.
2. The connector is IDC. It's possible to open it up and add the extra
lead, but like all IDC connectors, it's rather fragile.
3. Of the 25 leads in th