[time-nuts] Fw: FTS 4060 Cesium Time & Frequency Standard, Datum

paul swed paulswedb at gmail.com
Thu Oct 3 14:13:42 EDT 2013


Boy am staying clear of the rebuild discussion. Search time nuts the
details are explicitly explained and interesting. Has to do with
reactivity, vacuums, and shields.
Correct mix of the CS stuff. My pharmacy doesn't carry whats needed,
walmart either.
Regards
Paul


On Thu, Oct 3, 2013 at 1:07 PM, Tom Miller <tmiller at skylinenet.net> wrote:

> Hi guys,
>
> I wonder if the beam current amp is working? Shouldn't I at least see some
> noise when I run the gain all the way up? I need to wait until I get the
> manual to see where to look and what to check. I do know which DAC is used
> for the beam gain setting but where to see if it works is not too clear.
>
> I know everyone says the tubes can't be rebuilt, but why?
>
> Tom
>
>
>
> ----- Original Message ----- From: "paul swed" <paulswedb at gmail.com>
> To: "Discussion of precise time and frequency measurement" <
> time-nuts at febo.com>
> Sent: Thursday, October 03, 2013 11:18 AM
> Subject: Re: [time-nuts] Fw: FTS 4060 Cesium Time & Frequency Standard,
> Datum
>
>
>
> Joe,
> I did not actually look at the numbers until your email. I did reformat and
> clean them up for long term retention.
> Right you are and will guess the ion pump e is a direct reading at 2.4..KV
> The Ion pump I is nice and low
> Beam is zero or noise or profoundly weak.
> All of the other voltages look reasonable.
> Regards
> Paul
> WB8TSL
>
>
> On Thu, Oct 3, 2013 at 9:08 AM, J. L. Trantham <jltran at att.net> wrote:
>
>  Suspicious for a dead tube.
>>
>> Joe
>>
>> -----Original Message-----
>> From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces@**febo.com<time-nuts-bounces at febo.com>]
>> On
>> Behalf Of Tom Miller
>> Sent: Wednesday, October 02, 2013 9:54 PM
>> To: time-nuts at febo.com
>> Subject: [time-nuts] Fw: FTS 4060 Cesium Time & Frequency Standard, Datum
>>
>>
>>
>> Just to get this data on the list.
>>
>> Here are the measured voltages on U1:
>>
>> Pin     Fn                      Voltage         Limits
>> 9        Beam I                0.001            1.01 to 3.73
>> 18      Ion Pump E        2.436            1.72 to 3.01
>> 7        Ion Pump I            0.020            0 to 2.0
>> 19      Elec Multi E        2.060            0.84 to 3.01
>> 17      C-Field I              3.65              3.28 to 4.45   (front
>> panel
>> sw set at 500)
>> 16      Cs Oven T          1.379            1.27 to 1.55
>> 20      Xtal Oven Pwr    3.57              2.81 to 3.91
>> 3        180 MHz Lvl        2.784            0.1 to 4.8
>> 2        12.6 MHz Dig     4.84               4.0 to 5.0
>> 23      12.6 MHz Ana    1.34               0.35 to 4.28
>> 6         +5 Supply           2.427            2.35 to 2.68
>> 4         +18 V Supply     2.484            2.42 to 2.68
>> 22       - 18 V Supply     2.481            1.72 to 3.52
>> 21        Chassis T          3.045            2.62 to 3.44
>>
>>
>> It has been on for four days.
>>
>> When I compare the 10 MHz out to my GPSDO, the frequency matches up when
>> the
>> control (meter 4) passes 3.2 volts. There is no movement in the Beam
>> current
>> (meter 3) as control sweeps.
>>
>>
>>
>> Tom
>>
>>
>>
>>   ----- Original Message -----
>>   From: Tom Knox
>>   To: Tom Miller ; Time-Nuts
>>   Sent: Wednesday, October 02, 2013 2:00 PM
>>   Subject: RE: [time-nuts] FTS 4060 Cesium Time & Frequency Standard,
>> Datum
>>
>>
>>
>>   If anyone has a service manual I am also very interested. Thanks
>>   Thomas Knox
>>
>>
>>
>>   > From: tmiller at skylinenet.net
>>   > To: time-nuts at febo.com
>>   > Date: Wed, 2 Oct 2013 13:22:45 -0400
>>   > Subject: Re: [time-nuts] FTS 4060 Cesium Time & Frequency Standard,
>> Datum
>>   >
>>   > Hello Corby,
>>   >
>>   > Thanks for the help. Yes, could you copy me on the information for the
>> U1
>>   > chip? I do not have anything other than the user manual from Brooke.
>> At
>> this
>>   > time, anything will be a great help.
>>   >
>>   >
>>   > Best regards,
>>   > Tom
>>   >
>>   >
>>   > ----- Original Message -----
>>   > From: <cdelect at juno.com>
>>   > To: <time-nuts at febo.com>
>>   > Sent: Wednesday, October 02, 2013 11:47 AM
>>   > Subject: [time-nuts] FTS 4060 Cesium Time & Frequency Standard, Datum
>>   >
>>   >
>>   > Tom,
>>   >
>>   > On the 4060 you can easily monitor the Ion pump voltage and current,
>> the
>>   > electron multiplier voltage, and other important parameters by
>> measuring
>>   > the voltages on the U1 chip on the uP board.
>>   > This saves you fronm having to diconnect stuff to measure the HV and
>>   > such.
>>   > If you don't have a manual showing the pins of U1 I can post to pinout
>>   > here on Time Nuts.
>>   >
>>   > Corby
>>   >
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