On 10/23/2020 3:52 PM, paul swed wrote:
Corby
I have run into issues with the older coax essentially rotting internally.
It allows teh center conductor to tough the outer in the worst case. Is
FWIW, in those days HP had its own internal shop
that made wire and coax. This situation could
acc
Corby
I have run into issues with the older coax essentially rotting internally.
It allows teh center conductor to tough the outer in the worst case. Is
that a concern from your experience? HP 3586 slvm as an example.
How hard was it to get that unit out. (Hoping I never need to actually do
this)
R
If the unit fails again just diconnect the 60Mhz output jack from A3 and
Ohm from the center pin to shield on the cables connector with a
semiconductor setting on the DVM.
Try both directions as the diode can be installed either way.
If you can "see" the diode that way it is most certainly good.
I
Am 22.10.20 um 23:54 schrieb Richard (Rick) Karlquist:
I suspect that the stock 5065 chain has better
phase noise than this chip. I know for sure
that you can get much better phase noise than
this chip by using conventional architectures.
Of course they are more complicated, etc. Just
wanted t
I doubt that the SRD is the problem. It's just the last thing in the
chain, and a number of things ahead of it all have to work right first.
I'd look first at any connections and wiring between various sections,
and jiggle things around to see if the symptoms can return. Next, if ICs
and trans
I suspect that the stock 5065 chain has better
phase noise than this chip. I know for sure
that you can get much better phase noise than
this chip by using conventional architectures.
Of course they are more complicated, etc. Just
wanted to put this chip in perspective.
Rick N6RK
On 10/22/202
I would tend to agree with the assessment that the
SRD is not a high failure rate item. Also, it
could experience a faux failure where the fixturing
of it corroded such that it was not making good
electrical contact any more, but the underlying diode
was still good. Cleaning up the contact area
Ulf,
I have never had a 5065A with a bad or malfunctioning step recovery
diode in the physics package.
MANY other problems are more likely the cause.
Cheers,
Corby
___
time-nuts mailing list -- time-nuts@lists.febo.com
To unsubscribe, go to
http:/
Hi
The device in the cavity that takes the 60 MHz up to 6.x GHz is a
step recovery diode ( SRD ). The actual device used (apparently)
was unique to the 5065.
One proposed “fix” is to eliminate the whole synth / multiply empire
and replace it with a very high resolution DDS generating the 6.x GH
Strolled into my little lab only to find the 5065A's Red Integrator Limit
light on. Control negative fsd. PhotoCurrent OK. No 2nd harmonic.
Was just about to power off and start to disassemble the unit.
All of a sudden, the Integrator light went out. Control went to zero
and by pressing Rese
10 matches
Mail list logo
