[time-nuts] Lucent KS-24361 10 Mhz out success.

paul swed paulswedb at gmail.com
Wed Dec 3 22:51:52 EST 2014


Well that was easier then I thought. Here is the tap off point.
Bottom of the board. I have not been able to trace the place it comes from.
Between the two caps is a via and I have ohm'ed out lots of them and never
hit the other end. I wanted to attach from the top.
Also a pix of the el2020 buffer. The red coax feeds the old 15 MHz output
after cutting the old trace on the bottom.
Regards
Paul
WB8TSL


On Wed, Dec 3, 2014 at 10:42 PM, paul swed <paulswedb at gmail.com> wrote:

> I have a pix of the point to tap. Its on the bottom of the board. Not sure
> I can skinny it down to fit Time Nuts has to be sub 100K.
> I will tinker tomorrow night and see if I can get it down.
> Regards
>
> On Wed, Dec 3, 2014 at 10:40 PM, paul swed <paulswedb at gmail.com> wrote:
>
>> J8 its unpopulated right next to the oven.
>> Regards
>> Paul
>> WB8TSL
>>
>> On Wed, Dec 3, 2014 at 7:36 PM, Doug Ronald <doug at dougronald.com> wrote:
>>
>>> I may have missed this info in a previous post, but I am interested in
>>> tapping off the 5 MHz signal. I have my REF-1 apart, but don't have it
>>> powered. I will buffer the signal, and suspect the 5 MHz is available right
>>> around Q205, but it might be up around Q204 or Q203. Could someone advise
>>> me as to exactly where to pick off a nice 5 MHz sine wave?
>>> Thanks,
>>> -Doug R.
>>> -----Original Message-----
>>> From: time-nuts [mailto:time-nuts-bounces at febo.com] On Behalf Of paul
>>> swed
>>> Sent: Wednesday, December 03, 2014 3:05 PM
>>> To: Time-nuts
>>> Subject: [time-nuts] Lucent KS-24361 10 Mhz out success.
>>>
>>> Have successfully tapped into the clean 10 MHz of the the Lucent and
>>> using a EL2020 50 Mhz current opamp have a very nice 10 Mhz sine wave out.
>>> Any spurs are down at least 43 db. Close in at 4Khz total span or 500
>>> Hz/div I don't see anything down to at least 65 db. Thats the best detail
>>> the HP 8568B will allow.
>>>
>>> To get the signal out of the Lucent I sliced the 15 Mhz trace and
>>> injected the 10 Mhz into the SMA output connector.
>>>
>>> I am sure there are many other amplifiers and methods that could be used
>>> but this ones working well and can drive some real coax lengths.
>>>
>>> Now the really hard part. Mounting it and the power supply into a rack
>>> panel.
>>> Regards
>>> Paul
>>> WB8TSL
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>>
>>
>
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