[time-nuts] KS-24361 10 Mhz mod interesting document -> older KS boxes

paul swed paulswedb at gmail.com
Thu Nov 20 22:31:10 EST 2014


I do agree its subjective. But my gut says bad is 2-3V I know they seem to
run above 3. But whatever. When the blinkOmeter counts I am screwed. :-)
Time to get the heatgun.
Regards
Paul.

On Thu, Nov 20, 2014 at 9:07 PM, Bob Camp <kb8tq at n1k.org> wrote:

> Hi
>
> I normally keep a watch on the lamp voltage (or what ever it actually is).
> I was once told by somebody who should know that you simply watch for it to
> drop. When it starts going down a couple volts, that’s when you should
> start looking for a backup. It may run for months after it starts to drop.
> It may run for weeks. There apparently is no good way to be sure. On a part
> that starts at 6 to 7 volts, that would equate to something a 3 to 4 volt
> limit.
>
> Bob
>
> > On Nov 20, 2014, at 9:00 PM, paul swed <paulswedb at gmail.com> wrote:
> >
> > Unless you have a way to know what they are doing. You won't know if they
> > are failing. The initial sign is that they wink-out and restart. You will
> > spot it as your gear going nuts for a bit and then magically locking up.
> > Also as an approx lamp V in the 2-3V range. Thats really a gross figure I
> > can't swear thats EOL. But its some place close to that.
> > As such I installed the Rb winkOmeter on my unit.
> > Regards
> > Paul
> > WB8TSL
> >
> > On Thu, Nov 20, 2014 at 6:09 PM, Bob Camp <kb8tq at n1k.org> wrote:
> >
> >> Hi
> >>
> >> So far, I have yet to have one of the Rb’s die (of the ones that worked
> >> when new to me). The magic “lamp voltage” on the Efratom versions
> clusters
> >> in two groups. That seems to be related to some sort of production
> change
> >> rather than better performance on the (slightly) newer parts.
> >>
> >> Bob
> >>
> >>> On Nov 20, 2014, at 9:17 AM, paul swed <paulswedb at gmail.com> wrote:
> >>>
> >>> On the old telco RBs $25 they all worked, but were down on lamp life.
> So
> >>> the first one chosen ran for 3 years and then started blinking out.
> >>> Replaced it with another. That first one is the one I used the heat gun
> >> on
> >>> and is again operable with what appears could be good lamp life.
> >>> (Reasonable)
> >>> Regards
> >>> Paul
> >>> WB8TSL
> >>>
> >>> On Thu, Nov 20, 2014 at 7:00 AM, Bob Camp <kb8tq at n1k.org> wrote:
> >>>
> >>>> Hi
> >>>>
> >>>> So far, I have not found any of the Rb’s that came out of the KS boxes
> >>>> with troubles. The ones I got and pulled from boxes myself all have
> >> worked
> >>>> fine. The units that got pulled on the other side of an ocean, not so
> >> much.
> >>>> There have been a couple of them with issues. What ever they go
> through
> >>>> getting shipped overseas and salvaged, it’s not doing the parts any
> >> good.
> >>>> That’s one of the reasons getting the newer design KS boxes NIB has a
> >> lot
> >>>> of appeal. There are infant mortality reliability issues to deal with
> on
> >>>> new stuff. I’d rather have those issues than end of life and
> corrosion.
> >>>>
> >>>> Bob
> >>>>
> >>>>
> >>>>> On Nov 19, 2014, at 9:05 PM, paul swed <paulswedb at gmail.com> wrote:
> >>>>>
> >>>>> And I am the happy owner of 4 or 5 of the $25 RBs. Hey they are old
> but
> >>>> you
> >>>>> can recover them with the old heatgun trick. That said glowing things
> >>>> like
> >>>>> those do tend to wear out. I could see why they moved away from them.
> >>>>>
> >>>>> On Wed, Nov 19, 2014 at 8:15 PM, Bob Camp <kb8tq at n1k.org> wrote:
> >>>>>
> >>>>>> Hi
> >>>>>>
> >>>>>> Lucent has been putting GPS based Radio Frequency Timing Generators
> >>>> (RFTG)
> >>>>>> into cell sites for a long time. They all have the 15 MHz and pps
> >>>> outputs
> >>>>>> in common. Lucent also seems to like one paint color and an
> >> approximate
> >>>>>> size. For what ever reason (because they can?) the model numbers and
> >>>>>> internal designs change from time to time. For quite a while they
> >> really
> >>>>>> liked the idea of running Rb’s in cell sites. Looking at the latest
> >>>> batch
> >>>>>> of parts, that seems to have changed around 1999.
> >>>>>>
> >>>>>> Lots of generations of very similar looking boxes with very
> different
> >>>>>> stuff inside each of them.
> >>>>>>
> >>>>>> Bob
> >>>>>>
> >>>>>>> On Nov 19, 2014, at 7:53 PM, paul swed <paulswedb at gmail.com>
> wrote:
> >>>>>>>
> >>>>>>> I just saw the picture of the units front panel and it looked the
> >> same.
> >>>>>>> Oh well.
> >>>>>>> Regards
> >>>>>>> Paul
> >>>>>>> WB8TSL
> >>>>>>>
> >>>>>>> On Wed, Nov 19, 2014 at 7:08 PM, Bob Camp <kb8tq at n1k.org> wrote:
> >>>>>>>
> >>>>>>>> Hi
> >>>>>>>>
> >>>>>>>> This is a branch thread that never got it’s title changed to drop
> >> the
> >>>>>>>> KS-24361 part of it. More or less it’s “compare the older KS boxes
> >> to
> >>>>>> the
> >>>>>>>> newer ones”.
> >>>>>>>>
> >>>>>>>> Bob
> >>>>>>>>
> >>>>>>>>> On Nov 19, 2014, at 6:03 PM, Dan Rae <danrae at verizon.net> wrote:
> >>>>>>>>>
> >>>>>>>>> On 11/19/2014 2:47 PM, paul swed wrote:
> >>>>>>>>>> Was doing a search for Lucent RFTGm-II-XO looking for alternates
> >> to
> >>>>>> the
> >>>>>>>>>> $150 solution.
> >>>>>>>>>> A 10 Mhz mod popped up.
> >>>>>>>>>>
> >>>>>>>>>> http://telcodata.us/~myself/Lucent-RFTGm-Modification.pdf
> >>>>>>>>>>
> >>>>>>>>>> Looks simple enough and I have not validated anything.
> >>>>>>>>>> Regards
> >>>>>>>>>> Paul
> >>>>>>>>>> WB8TSL
> >>>>>>>>>>
> >>>>>>>>> Paul, that has nothing to do with the current ebay offerings that
> >>>> have
> >>>>>>>> generated so much traffic recently...
> >>>>>>>>>
> >>>>>>>>> Dan
> >>>>>>>>> _______________________________________________
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