Hi
Tearing the physics package apart and putting it back together again can be a
bit of a hassle on the small Rb’s …
Bob
> On Nov 21, 2014, at 2:00 PM, paul swed wrote:
>
> Bob
> Absolutely lots of ways to die. Such as bad caps, bad variable cap,
> resistors that are cooked. I am pretty g
Bob
Absolutely lots of ways to die. Such as bad caps, bad variable cap,
resistors that are cooked. I am pretty good with all of those and have
experienced most of them. But then comes the point of the dirty bulb and it
doesn't have to be the blob. Though you will find the blob most likely with
Hi
The heat gun approach assumes that the fault is a blob of metal that is stuck
in a bad location in the bulb. Unfortunately there are a lot of different ways
these beasts can die. The repair guys who should know always claimed that bulb
issues were < 30% of the issues they saw. That was on an
but there was a description; how to rejuvenate the rubidium bulb by
cautiously warning it up, to "remelt " the rubidium
73
Alex
On 11/20/2014 7:31 PM, paul swed wrote:
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
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 wrote:
> Hi
>
> I normally keep a watch on the lamp voltage (or wha
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 d
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'
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 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)
Regar
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 throug
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 wrote:
> Hi
>
> Lucent has been p
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 in
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 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 boxe
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 wrote:
>
> On 11/19/2014 2:47 PM, paul swed wrote:
>> Was doing a search for Lucent RFTGm-
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, th
Hi
Another alternative would be to AC couple into a NC7SZ125 (using a 0.1 uf cap
and a pair of 100K resistors )and take the output off with a Tee filter (using
two 1.5 uH coils and a 270 pf cap).
Bob
> On Nov 19, 2014, at 5:47 PM, paul swed wrote:
>
> Was doing a search for Lucent RFTGm-I
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
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