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" <paulsw...@gmail.com>
To: "Discussion of precise time and frequency measurement"
<time-nuts@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 <jlt...@att.net> wrote:
Suspicious for a dead tube.
Joe
-----Original Message-----
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Tom Miller
Sent: Wednesday, October 02, 2013 9:54 PM
To: time-nuts@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: tmil...@skylinenet.net
> To: time-nuts@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: <cdel...@juno.com>
> To: <time-nuts@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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