[time-nuts] Fw: FTS 4060 Cesium Time & Frequency Standard, Datum
Tom Miller
tmiller at skylinenet.net
Thu Oct 3 17:07:30 UTC 2013
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 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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> =
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