> a7yvm109gf5d1 wrote:
>
>
>
> I got a 5316 counter off ebay with OCXO and 1GHz channel.
> There\'s a differential amplifier/receiver in there, HP pn 1826-0589.
> Of course, the x-ref lists I\'ve found so far jump from 1826-0588 to
> 1826-0590. Either of those parts have nothing to do with amplifying.
>
> Anybody have a clue what this part could be?
>
> The BOM claims it\'s a TO-8, but the schematic shows 12 pin numbers...
> I\'ll take the unit apart tomorrow and see what the chip says but it
> looks like a complex thing to take apart and I\'ll bet there\'s no other
> numbers on the part.
>
> I\'ve tried searching for ECL drivers, receivers, anything that would
> work at 1GHz and have those pin numbers. No luck. 100EL, 10E, etc..
>
Hi Friend! I have one 1826-0589 (new). If you still want, contact me. mems
"underline" ericson at yah oo point com point br
Reply by ChrisQ●October 20, 20092009-10-20
a7yvm109gf5d1@netzero.com wrote:
> I got a 5316 counter off ebay with OCXO and 1GHz channel.
> There's a differential amplifier/receiver in there, HP pn 1826-0589.
> Of course, the x-ref lists I've found so far jump from 1826-0588 to
> 1826-0590. Either of those parts have nothing to do with amplifying.
>
> Anybody have a clue what this part could be?
>
> The BOM claims it's a TO-8, but the schematic shows 12 pin numbers...
> I'll take the unit apart tomorrow and see what the chip says but it
> looks like a complex thing to take apart and I'll bet there's no other
> numbers on the part.
>
> I've tried searching for ECL drivers, receivers, anything that would
> work at 1GHz and have those pin numbers. No luck. 100EL, 10E, etc..
Not in either of my lists either :-(
Depending on the age of the counter, if there's no commercial
equivalent, it's likely to be an in house hp custom device, in which
case the only answer is to find and replace with equivalent
functionality. The usual way here is to find a functionally equivalent
device, glue it upsidedown on the board with dow corning (so it can be
removed again) and use 26swg wire to connect it up. Had to do this
recently on a General Radio vhf synthesiser, which uses dozens of /10
ecl dividers. Didn't have the part in stock but did have some Plessey
devices which worked fine.
The early hp kit is brilliantly engineered, but can be a real pain to
fix because of all the custom devices, some of them in the wierdest of
looking packages. The worst examples i've seen to data was a 5345a
counter, which has loads of custom devices. In the end, bought another
scruffy one on Ebay just for parts...
Regards,
Chris
Reply by ●October 19, 20092009-10-19
I got a 5316 counter off ebay with OCXO and 1GHz channel.
There's a differential amplifier/receiver in there, HP pn 1826-0589.
Of course, the x-ref lists I've found so far jump from 1826-0588 to
1826-0590. Either of those parts have nothing to do with amplifying.
Anybody have a clue what this part could be?
The BOM claims it's a TO-8, but the schematic shows 12 pin numbers...
I'll take the unit apart tomorrow and see what the chip says but it
looks like a complex thing to take apart and I'll bet there's no other
numbers on the part.
I've tried searching for ECL drivers, receivers, anything that would
work at 1GHz and have those pin numbers. No luck. 100EL, 10E, etc..