Re: [time-nuts] time-nuts Digest, Vol 192, Issue 10
Very helpful - thanks to Tom & Tom.
This unit does not have VR modules - the power controller is one circuit board about 6" long, and it has been badly burnt.
Schematic solves identity of CAPSUL 0616 black box - this is the backlight driver for the LCD backlight HV supply. Although there are 5 connections to the front display board wheras the schematic suggests only 4.
The "Start A+ Source" seems to +10V <200mA . "Run A+ Source" is also unregulated and no voltage specified, although since 1N914s are used, the current can't be much. I see "Start A+ Source", "Run A+ Source", and A+ sink labels, but no indication as to what goes in between. Maybe the only purpose is powering U1.
OSC B+/RTN - isolated unregulated. Is this 24V? That seems unexpected because C27 is only rated at 25V.
There seems to be +5V unreg major current. I'll have to figure out the current.
Linear VRs are listed as 78XX and 79XX and 7905 (U6-8) - they are not populated in this unit.
Someone already replaced CR15 in this unit with a much larger diode but it looks like CR14 was on fire at some point, as were R9, U1 and C1. They took out neighboring components when they went. Also, CR2 is definitely not a 1N4002 so that got replaced at some point with a larger part. Black soot on the topside, multiple carbonized components, and vaporized traces on the bottom suggest to me it is not worth the time to repair this thing.
Remaining questions-
-
OSC voltage? Did Austron really use 25V caps for a 24V line? The oscillator is clearly labeled 15V but it has a separate LM350T VR. I would guess that 18V would be fine for it but I will check that with bench PS. Maybe the design voltage is 20V?
-
Can I modify the display board to use a standard DC backlight display power supply?
-
What is the purpose of the Start A+ Source and Run A+ Source? Do they have any use outside the power controller board?
As a general design strategy, I don't get the purpose of the multiple over/under-voltage circuits, crowbars, and alarms. None of that stuff prevented this thing from going up in smoke.
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Today's Topics:
- Re: Raspberry Pi NTP server (Steve Platt)
- Re: Raspberry Pi NTP server (Tim Shoppa)
- HP-5372A and HP-5372A operation with no CRT display.
(Lester Veenstra) - ESE ES-188 Master Clock : Repair (Gregory Beat)
- Re: HP-5372A and HP-5372A operation with no CRT display.
(Magnus Danielson) - 5071A (Bill Notfaded)
- Re: 5071A (Bob kb8tq)
- Re: 5071A (Tom Van Baak)
- Austron 2110 schematics? (AC0XU (Jim))
- Re: Austron 2110 schematics? (Tom Van Baak)
- Re: Austron 2110 schematics? (Tom Knox)
- Success replacing Oncore VP with Synergy SR-6Tf ? (Steve Jones)
- Re: HP-5372A and HP-5372A operation with no CRT display.
(Lester Veenstra) - Re: HP-5372A and HP-5372A operation with no CRT display.
(Gary Woods)
Message: 1
Date: Sun, 5 Jul 2020 15:53:00 +0100
From: Steve Platt steve.platt@ntlworld.com
To: time-nuts@lists.febo.com
Subject: Re: [time-nuts] Raspberry Pi NTP server
Message-ID: 70893931-f340-fee9-d518-924579c96d36@ntlworld.com
Content-Type: text/plain; charset=utf-8; format=flowed
On 03/07/2020 13:56, Andrew Hancock wrote:
But here's the weird thing, it starts out okay, from what I can tell, and I get 377 for both GPSD and PPS
remote refid st t when poll reach delay offset jitter
---============
*127.127.28.0 .GPSD. 1 l 21 32 37 0.000 98.447 89.508
o127.127.22.0 .PPS. 0 l 20 32 17 0.000 -63.468 27.800
That's NOT ok, IMHO :-)
I think the offset and jitter for the PPS server are far too high.
Here's what my Raspberry Pi2 looks like:
$ ntpq -p
???? remote?????????? refid????? st t when poll reach?? delay offset?
jitter
---============
*SHM(0)????????? .SHM.??????????? 0 l??? 7?? 16? 377??? 0.000 -90.737?
65.556
oPPS(0)????? ? ?? .PPS.????? ? ???? 0 l??? 5?? 16? 377 0.000???
0.002?? 0.002
+ntp0... (other NTP servers omitted but 0ffset values were 1 or 2 ms)
My setup sounds like your original, with a GPS Hat and PPS on a GPIO
line.? The huge difference between your remote servers and your PPS
signal suggest (as others have said) that the timing of your PPS signal
is wrong.? I think that is the cause of your problems.
Steve
Message: 2
Date: Sun, 5 Jul 2020 11:14:55 -0400
From: Tim Shoppa tshoppa@gmail.com
To: Discussion of precise time and frequency measurement
time-nuts@lists.febo.com
Subject: Re: [time-nuts] Raspberry Pi NTP server
Message-ID:
CAJ_qRvbQpqQg66YXT7ngWdwqUzFokLqoRptkAduLyYr6xg4imA@mail.gmail.com
Content-Type: text/plain; charset="UTF-8"
Andrew, outlier rejection in NTPD is not the most stable thing in the world.
You have two local refclocks that are consistently 200ms off from the "rest
of the world" and this is 10 times larger than the round trip delay to the
rest of the world.
But the local stratum 0 refclock poll interval is ten or twenty times more
frequent than the rest of the world so the local wrong clock gets to
trigger the algorithm ten times as often as the rest of the world.
The outlier rejection NTPD algorithm goes absolutely bonkers in this case.
Which is good because you see it and fix the actual problem.
Like David suggested, seeing the 200ms offset, this 200ms is a very common
default PPS pulse width so it almost certainly is triggering off the wrong
edge.
Tim N3QE
On Sun, Jul 5, 2020 at 7:50 AM Andrew Hancock <
andrew.hancock@cyrus-consultants.co.uk> wrote:
Thanks David
I may try that list.
It is odd, it works fine, and then craps out....
And then it's happy again...
Andrew
-----Original Message-----
From: time-nuts time-nuts-bounces@lists.febo.com On Behalf Of David J
Taylor via time-nuts
Sent: 03 July 2020 18:34
To: time-nuts@lists.febo.com
Cc: David J Taylor david-taylor@blueyonder.co.uk
Subject: Re: [time-nuts] Raspberry Pi NTP server
A puzzle (so I hope) I'm in the correct place.
I've built myself, many years ago an NTP server, on a RPi 1, which not
sure if ever ran properly.
It uses a u-blox6 board, connected to the Pi correctly, and PPS to GPIO,
compiled NTP to include kernel PPS support.
GPS 3D fix is fine, using an outside aerial, there are no issues here
reported with cgps -s or gpsmon, but recently I've racked mounted all my
PIs in a network rack.
So I cannot use HaTs anymore, so I cobbled together a GPS ublox6 (same
module) but using a FT232RL, and connected all the pins correctly, and DCD
so I can get PPS.
Cgps -s and gpsmon, reports all is well, pps registers correctly...
But here's the weird thing, it starts out okay, from what I can tell, and
I get 377 for both GPSD and PPS
remote refid st t when poll reach delay offset
jitter
---============
*127.127.28.0 .GPSD. 1 l 21 32 37 0.000 98.447
89.508
o127.127.22.0 .PPS. 0 l 20 32 17 0.000 -63.468
27.800
uk.pool.ntp.org .POOL. 16 p - 1024 0 0.000 0.000
0.004
+212.23.8.6 195.66.241.2 2 u 129 1024 1 13.266 198.007
3.273
+212.23.10.129 85.199.214.99 2 u 134 1024 1 19.693 195.605
3.282
+178.62.18.76 85.199.214.100 2 u 135 1024 1 13.804 195.465
3.299
+185.120.34.123 85.199.214.98 2 u 130 1024 1 12.808 197.879
3.304
+51.68.198.213 85.199.214.102 2 u 132 1024 1 13.534 197.377
3.402
+95.215.175.2 178.79.160.57 3 u 131 1024 1 19.722 198.984
3.244
And then later.
remote refid st t when poll reach delay offset
jitter
---============
*127.127.28.0 .GPSD. 1 l 20 32 377 0.000 -38.512
43.162
x127.127.22.0 .PPS. 0 l 19 32 377 0.000 -159.01
0.949
uk.pool.ntp.org .POOL. 16 p - 1024 0 0.000 0.000
0.004
+212.23.8.6 195.66.241.2 2 u 255 1024 1 13.615 142.618
1.953
+212.23.10.129 85.199.214.99 2 u 261 1024 1 19.799 144.028
3.384
+162.159.200.123 10.63.8.8 3 u 258 1024 1 18.501 141.995
3.016
+185.53.93.157 81.187.26.174 2 u 258 1024 1 15.385 143.600
3.045
-217.114.59.3 33.117.170.50 2 u 259 1024 1 19.927 143.014
3.364
+109.74.192.97 85.199.214.99 2 u 255 1024 1 13.578 142.723
1.864
Which does not look good, notice the x in front of PPS...
And then sometimes.... It borks.. and drops out completely and * and x
disappear, and all the +.
Then go back to
remote refid st t when poll reach delay offset
jitter
---============
*127.127.28.0 .GPSD. 1 l 27 64 3 0.000 34.096
1.954
o127.127.22.0 .PPS. 0 l 26 32 3 0.000 -69.865
14.194
uk.pool.ntp.org .POOL. 16 p - 1024 0 0.000 0.000
0.002
212.23.8.6 195.66.241.2 2 u 121 1024 1 13.316 200.644
0.002
212.23.10.129 85.199.214.99 2 u 118 1024 1 19.929 202.213
0.002
178.79.155.116 85.199.214.99 2 u 120 1024 1 13.391 201.057
0.002
185.121.25.242 85.199.214.99 2 u 121 1024 1 14.084 200.964
0.002
81.21.65.169 195.195.221.100 2 u 122 1024 1 17.587 200.121
0.002
178.62.6.8 68.166.61.255 2 u 122 1024 1 13.864 200.580
0.002
I'm beginning to wonder my testing using Meinberg polling every 10 seconds
is causing the Pi an issue!
remote refid st t when poll reach delay offset
jitter
---============
*127.127.28.0 .GPSD. 1 l 13 64 377 0.000 144.454
69.663
o127.127.22.0 .PPS. 0 l 12 32 377 0.000 59.311
19.278
uk.pool.ntp.org .POOL. 16 p - 1024 0 0.000 0.000
0.002
212.23.8.6 195.66.241.2 2 u 491 1024 1 13.316 200.644
0.002
212.23.10.129 85.199.214.99 2 u 489 1024 1 19.929 202.213
0.002
178.79.155.116 85.199.214.99 2 u 491 1024 1 13.391 201.057
0.002
185.121.25.242 85.199.214.99 2 u 492 1024 1 14.084 200.964
0.002
81.21.65.169 195.195.221.100 2 u 493 1024 1 17.587 200.121
0.002
178.62.6.8 68.166.61.255 2 u 493 1024 1 13.864 200.580
0.002
Stopped monitoring, see if it stops...
Thanks for your comments
---=============
Andrew,
Three thoughts:
-
any chance the DCD pulse is the wrong polarity? Triggering on the
trailing an not the leading edge? Might give errors typically around 100
ms (the pulse width), but your errors seem to be more in the 250-300 ms
range. -
WNRO (week number roll over) issue?
-
unless you need stand-alone operation, try commenting out the type 28
driver.
I'd suggest the NTP Questions list, but it is /very/ fussy in what e-mail
provider it accepts. Only one of my four works!
https://lists.ntp.org/listinfo/questions
Cheers,
David
SatSignal Software - Quality software for you
Web: https://www.satsignal.eu
Email: david-taylor@blueyonder.co.uk
Twitter: @gm8arv
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Message: 3
Date: Sun, 5 Jul 2020 11:51:22 -0400
From: "Lester Veenstra" m0ycm@veenstras.com
To: "'Discussion of precise time and frequency measurement'"
time-nuts@lists.febo.com
Subject: [time-nuts] HP-5372A and HP-5372A operation with no CRT
display.
Message-ID: 00dc01d652e4$2225c4d0$66714e70$@com
Content-Type: text/plain; charset="iso-8859-1"
The repair bench is up and successful on repairing the A17 video driver
boards. This involved replacing bad caps.
If anyone has a bad A17 board, particularly ones with obvious blown
(literally) caps, I would be happy to repair and bench test.
No cost other than send it to me with a prepaid, pre printed USPS return
label.
Lester B Veenstra? K1YCM M?YCM W8YCM 6Y6Y
lester@veenstras.com
452 Stable Ln (HC84 RFD USPS Mail)
Keyser WV 26726
GPS: 39.336826 N? 78.982287 W (Google)
GPS: 39.33682 N? 78.9823741 W (GPSDO)
Telephones:
Home:?????????????????? ? +1-304-289-6057
US cell??????????????????? +1-304-790-9192
Jamaica cell:?????????? +1-876-456-8898
?
Message: 4
Date: Sun, 5 Jul 2020 13:42:27 -0500
From: Gregory Beat w9gb@icloud.com
To: time-nuts@lists.febo.com
Subject: [time-nuts] ESE ES-188 Master Clock : Repair
Message-ID: 7B5AF8C8-4127-47B0-9286-915F988B166C@icloud.com
Content-Type: text/plain; charset=utf-8
ESE ES-188 Master Clock : Repair
Another ESE Master Clock bargain ($100) arrived this summer on the time-nuts bench, from an eBay dumpster diver/flipper. The ES-188 NTP Referenced Master Clock/Time Code Generator.
The clock?s internal TCXO is synchronized via the Internet (NTP).
The ES-188 receives accurate time and date information from a user selected NTP server and supplies this data to the user in the form of five (5) different types of time code (SMPTE/EBU, IRIG-B, ASCII, TC89 and TC90) and a front panel nine-digit display (.56? yellow LEDs).
This Master Clock is used at locations without ability to mount an external GPS antenna, or facilities that desire an alternative time synchronization method (not GPS based).
?
FIRST Step, Request the full ES-188 manual, with schematic and parts list, from ESE Support - who delivers electronically (e-mail attachment).
Initial bench assessment confirmed the eBay reseller could not differentiate working, from non-working (Outrageous initial eBay asking price of >$300).
The 6 Volt, 1.3 Ah rechargeable battery and BR-2330 lithium coin cell were dead (config not retained), as expected.
The ES-188 has three (3) user access ports on rear panel:
RS-232(serial); USB; and Ethernet provide by Lantronix Xport (IPv4) model.
The Ethernet port acquired an IP address (DHCP), but did not respond with IP tools.
ESE provides PC software (Master Control Panel) for RS-232 and USB access from a PC.
The RS-232 port (MAX233) was not responsive.
The USB port (FTDI FT232BM) was recognized by the PC (Drivers loaded by Windows 10), BUT odd behavior was observed (worked sometimes).
Time to open up the ES-188 rack case to visual inspect inside.
The Six (6) electrolytic capacitors in the power supply section were bulging. An obvious failure of those smoothing capacitors, that provide DC to the LM317, 7805, and +3.3 volt regulators.
This ES-188 was built ~2008, so the Meritek 85? electrolytics (3300 uFd, 4700 uFd) used by ESE did not last 12 years.
?
SECOND Step, Order Parts and Install.
Panasonic EEU-FK radial electrolytic capacitors (25V, 105?) were purchased from Digi-Key for replacement, that matched the PC board lead spacing (7.50 mm) and diameter.
The new Panasonic capacitors were shorter (height).
Looking at the Schematic diagram, the ES-188 main processor is the 87C530QNL-188 (PLCC-52).
This Maxim processor sells for ~$50 (blank, no firmware in ROM).
https://www.mouser.com/datasheet/2/256/DS83C530-DS87C530-1511768.pdf
This microcontroller has multiple I/O lines and supports Intel 8051-instruction set (firmware).
There are three (3) ICs that connect to this processor for external user ports:
74HCT04 : HEX Inverter, six independent inverter gates
74HCT08 : AND Gate, four independent 2-input AND gates
MAX233CPP : 5 Volt, RS-232 Driver/Receiver
All three (3) of those chips were damaged, likely from nearby unstable DC power or an ESD event.
** The surface mounted FTDI FT232BM (USB bridge IC) was NOT damaged. **
Replacing the six (6) bad electrolytic capacitors, three (3) bad ICs, and two (2) new batteries for less than $20 (parts) restored the ES-188 to operation. The ES-188 then successfully sent IRIG-B time codes to my remote clock display.
?
LAST Step, Configure Master Clock and Operate.
I configured the ES-188 settings, via its Ethernet port (telnet), on a menu.
Set the initial Master Clock, Date and Time.
Set the ESE-188 local network address (IPv4), Gateway, and DNS Server.
For the NTP Primary Server, do not use the NIST or WWV time servers, Use your local ISP.
For example, my local Comcast/Xfinity (IPv4) server: 73.15.134.22
For the Secondary Server, select a reliable NTP server.
greg, w9gb
Message: 5
Date: Sun, 5 Jul 2020 21:32:39 +0200
From: Magnus Danielson magnus@rubidium.se
To: time-nuts@lists.febo.com
Subject: Re: [time-nuts] HP-5372A and HP-5372A operation with no CRT
display.
Message-ID: 9d89a8c6-105d-26dc-7fbd-fdcc5e511c54@rubidium.se
Content-Type: text/plain; charset=utf-8
Hi Lester,
Good to hear your progress.
So, I gather that you managed to successfully repair it, and it was a
capacitor issue that I also had experienced.
Which caps did fail for you? I think I recall a 50 uF bipolar cap.
Cheers,
Magnus
On 2020-07-05 17:51, Lester Veenstra via time-nuts wrote:
The repair bench is up and successful on repairing the A17 video driver
boards. This involved replacing bad caps.
If anyone has a bad A17 board, particularly ones with obvious blown
(literally) caps, I would be happy to repair and bench test.
No cost other than send it to me with a prepaid, pre printed USPS return
label.
Lester B Veenstra? K1YCM M?YCM W8YCM 6Y6Y
lester@veenstras.com
452 Stable Ln (HC84 RFD USPS Mail)
Keyser WV 26726
GPS: 39.336826 N? 78.982287 W (Google)
GPS: 39.33682 N? 78.9823741 W (GPSDO)
Telephones:
Home:?????????????????? ? +1-304-289-6057
US cell??????????????????? +1-304-790-9192
Jamaica cell:?????????? +1-876-456-8898
?
time-nuts mailing list -- time-nuts@lists.febo.com
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and follow the instructions there.
Message: 6
Date: Sun, 5 Jul 2020 11:50:25 -0700
From: Bill Notfaded notfaded1@gmail.com
To: Discussion of precise time and frequency measurement
time-nuts@lists.febo.com
Subject: [time-nuts] 5071A
Message-ID:
CADToqn0gso=jf35wyAN1ffPhnB1Wh0+pRijVvRbNZSY1XoqbTQ@mail.gmail.com
Content-Type: text/plain; charset="UTF-8"
If the power is cycled on one of these will it always go into attention
mode yellow until cleared? Or will it go green continuous operation all in
it's own? If one of these has been on the shelf a while is it common for
one even with a good tube to report attention yellow for a while until tube
pumps down and eventually will the yellow clear on it's own?
Bill
Message: 7
Date: Sun, 5 Jul 2020 16:12:06 -0400
From: Bob kb8tq kb8tq@n1k.org
To: Discussion of precise time and frequency measurement
time-nuts@lists.febo.com
Subject: Re: [time-nuts] 5071A
Message-ID: DD39D07A-181D-4E7A-9BFE-D21ECC0ADFC2@n1k.org
Content-Type: text/plain; charset=utf-8
Hi
My recollection is that if power is cycled, it drops out of ?continuous operation
mode?. There might even be BBC footage documenting this ? :)
Simply put, all of these devices ( 5071 and the other HP atomic standards I
have seen) only go into continuous operation when you push a button. Anything
odd that comes along takes them out of this mode. It?s just a flip flop so you
can?t read a lot into it being off. Power line voltage ?out of spec? is one way
to nuke it (at least on some HP?s ).
Bob
On Jul 5, 2020, at 2:50 PM, Bill Notfaded notfaded1@gmail.com wrote:
If the power is cycled on one of these will it always go into attention
mode yellow until cleared? Or will it go green continuous operation all in
it's own? If one of these has been on the shelf a while is it common for
one even with a good tube to report attention yellow for a while until tube
pumps down and eventually will the yellow clear on it's own?
Bill
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and follow the instructions there.
Message: 8
Date: Sun, 5 Jul 2020 13:24:14 -0700
From: Tom Van Baak tvb@LeapSecond.com
To: time-nuts@lists.febo.com
Subject: Re: [time-nuts] 5071A
Message-ID: b7fdb25b-e1b5-6f82-fffa-dcd95f00aec6@LeapSecond.com
Content-Type: text/plain; charset=utf-8; format=flowed
Bill,
A 5071A will never go solid-green "continuous operation" on its own.
That solid-green state is set manually from the blinking-green state, by
design.
This prevents you from seeing green, having a short power failure
overnight, and then you come back in the morning and see green and you
think all is well. The 5061A and 5065A have a similar fail safe.
The yellow LED means attention, as in something's wrong and it did not
warm up or lock. The internal diagnostics are pretty good so if it gives
up there's a good reason. The error code is available on the front panel
LCD or via SCPI over the RS232 port. Depending on the diagnostic log or
the text of fatal error it's pretty clear when there's no hope. In the
case of leaky tube or ion pump failure there's nothing wrong with trying
again and again and again and again until you give up hope.
On the other hand if all goes well during warm-up and lock is achieved,
yellow goes out on its own and you get blinking-green. It's up to you
then to manually set it to solid-green.
/tvb
On 7/5/2020 11:50 AM, Bill Notfaded wrote:
If the power is cycled on one of these will it always go into attention
mode yellow until cleared? Or will it go green continuous operation all in
it's own? If one of these has been on the shelf a while is it common for
one even with a good tube to report attention yellow for a while until tube
pumps down and eventually will the yellow clear on it's own?
Bill
Message: 9
Date: Sun, 05 Jul 2020 14:34:08 -0600
From: "AC0XU (Jim)" James.Schatzman@ac0xu.com
To: time-nuts@lists.febo.com
Subject: [time-nuts] Austron 2110 schematics?
Message-ID: 20200705203409.A4CE0C1B00@mail.futurelabusa.com
Content-Type: text/plain; charset="us-ascii"
Time Nuts-
I have an Austron 2110 with a severely toasted power controller board. Probably not repairable. I plan to build a substitute with a more modern design.
Does anyway have schematics? I noticed correspondence between Magnus Danielson and Harald Hauglin some years ago. Did the manula or schematics ever get posted?
Thanks in advance-
Jim
Message: 10
Date: Sun, 5 Jul 2020 14:33:13 -0700
From: Tom Van Baak tvb@LeapSecond.com
To: time-nuts@lists.febo.com
Subject: Re: [time-nuts] Austron 2110 schematics?
Message-ID: 6248ba95-d7b7-454c-d462-999531e92a50@LeapSecond.com
Content-Type: text/plain; charset=utf-8; format=flowed
Jim,
For the power supply see: http://leapsecond.com/museum/au2110b/ps.htm
Let me know if you need more pages from the manual.
For sample LCD readings see: http://leapsecond.com/museum/au2110b/lcd.htm
/tvb
On 7/5/2020 1:34 PM, AC0XU (Jim) wrote:
Time Nuts-
I have an Austron 2110 with a severely toasted power controller board. Probably not repairable. I plan to build a substitute with a more modern design.
Does anyway have schematics? I noticed correspondence between Magnus Danielson and Harald Hauglin some years ago. Did the manula or schematics ever get posted?
Thanks in advance-
Jim
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Message: 11
Date: Sun, 5 Jul 2020 21:46:38 +0000
From: Tom Knox actast@hotmail.com
To: Discussion of precise time and frequency measurement
time-nuts@lists.febo.com
Subject: Re: [time-nuts] Austron 2110 schematics?
Message-ID:
CY4PR04MB0472C776507D751C9C6DBCF6DF680@CY4PR04MB0472.namprd04.prod.outlook.com
Content-Type: text/plain; charset="iso-8859-1"
Hi Jim;
These are encapsulated blocks two 48>5 and one 48>24 - I know the 24 is made by Victor. Pretty easy to replace.
I up-dated my 2110 with a high contrast LED backlite display. Easy to do when you have it apart.
Cheers;
Tom Knox
SR Test and Measurement Engineer
Ascent Concepts and Technology
4475 Whitney Place
Boulder Colorado 80305
303-554-0307
"Peace is not the absence of violence, but the presence of Justice" Both MLK and Albert Einstein
From: time-nuts time-nuts-bounces@lists.febo.com on behalf of Tom Van Baak tvb@LeapSecond.com
Sent: Sunday, July 5, 2020 3:33 PM
To: time-nuts@lists.febo.com time-nuts@lists.febo.com
Subject: Re: [time-nuts] Austron 2110 schematics?
Jim,
For the power supply see: http://leapsecond.com/museum/au2110b/ps.htm
Let me know if you need more pages from the manual.
For sample LCD readings see: http://leapsecond.com/museum/au2110b/lcd.htm
/tvb
On 7/5/2020 1:34 PM, AC0XU (Jim) wrote:
Time Nuts-
I have an Austron 2110 with a severely toasted power controller board. Probably not repairable. I plan to build a substitute with a more modern design.
Does anyway have schematics? I noticed correspondence between Magnus Danielson and Harald Hauglin some years ago. Did the manula or schematics ever get posted?
Thanks in advance-
Jim
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Message: 12
Date: Sun, 5 Jul 2020 14:59:46 -0700
From: Steve Jones time-nuts@smj.crash.com
To: time-nuts@lists.febo.com
Subject: [time-nuts] Success replacing Oncore VP with Synergy SR-6Tf ?
Message-ID: c0c80c8f-9558-a098-8dc9-537dfdc18571@smj.crash.com
Content-Type: text/plain; charset=utf-8; format=flowed
Greetings,
I've found various posts in the list archive since about 2012 suggesting
that one could drop a Synergy SSR-6Tf in to replace an Oncore VP board,
or about planning to do so (and others about replacing an M12* with an
SSR-6Tr[u]). But if anybody has simply posted, "I dropped in an SSR-6Tf
and it worked" then I missed it. I wrote to Synergy's contact address
shortly before the (US) holiday, but it could be a while before they
respond...
So, can anybody say "Yes, I replaced a VP with an SSR-6Tf and it Just
Worked?"
FWIW my specific use case is a Spectracom NetClock/GPS 1U rackmount w/
display, and the serial number on the GPS receiver board inside maps to
an Oncore VP per a document about WNRO &c on the Synergy site.
Thanks in advance,
--Steve.
Steve Jones
Berkeley, California
"The amount of beauty required launch 1 ship = 1 Millihelen"
Message: 13
Date: Mon, 6 Jul 2020 10:42:48 -0400
From: "Lester Veenstra" m0ycm@veenstras.com
To: "'Discussion of precise time and frequency measurement'"
time-nuts@lists.febo.com
Subject: Re: [time-nuts] HP-5372A and HP-5372A operation with no CRT
display.
Message-ID: 01d301d653a3$b87be3f0$2973abd0$@com
Content-Type: text/plain; charset="utf-8"
Magnus:
The suspects were not hard to locate, leaking black goo. I did measure the actual values of most of the larger electrolytics on the A17, for future reference. On two boards, C414, 3300 mfd 35 vdc had to be replaced with new 3300 mfd 50 vdc units. One board had a good C414 with only in place a 4.7 mfd component. Replaced this also with 3300 mfd 50 vdc.
One board also needed C406, 450 mfd 50V replaced.
Now all three boards,on bench, with just 12Vdv applied produce a nice raster , intensity controllable with variable 0-5 vdc on video input.
Waiting on some female pins to arrive to make up a jumper cable from the mother board to an external A17/CRT for final test before reassembling the system.
Certainly not as exciting as bring Cesium Beam standards back to life, but I do like to keep the old boat anchors glowing, even if they only have a single vacuum tube. HI .
Lester B Veenstra K1YCM M?YCM W8YCM 6Y6Y
lester@veenstras.com
-----Original Message-----
From: time-nuts [mailto:time-nuts-bounces@lists.febo.com] On Behalf Of Magnus Danielson
Sent: Sunday, July 05, 2020 3:33 PM
To: time-nuts@lists.febo.com
Subject: Re: [time-nuts] HP-5372A and HP-5372A operation with no CRT display.
Hi Lester,
Good to hear your progress.
So, I gather that you managed to successfully repair it, and it was a
capacitor issue that I also had experienced.
Which caps did fail for you? I think I recall a 50 uF bipolar cap.
Cheers,
Magnus
Message: 14
Date: Mon, 06 Jul 2020 11:09:14 -0400
From: Gary Woods garygarlic@earthlink.net
To: Discussion of precise time and frequency measurement
time-nuts@lists.febo.com
Subject: Re: [time-nuts] HP-5372A and HP-5372A operation with no CRT
display.
Message-ID: uif6gftocieppfvlcgj2gjfpi9r14qjmkj@4ax.com
Content-Type: text/plain; charset=us-ascii
On Mon, 6 Jul 2020 10:42:48 -0400, you wrote:
Certainly not as exciting as bring Cesium Beam standards back to life, but I do like to keep the old boat anchors glowing, even if they only have a single vacuum tube. HI .
As the instructor at an RCA seminar said, "I like those glass NPN
devices with the light inside so you can tell they're on."
Gary Woods O- K2AHC Public keys at home.earthlink.net/~garygarlic, or get 0x1D64A93D via keyserver
fingerprint = E2 6F 50 93 7B C7 F3 CA 1F 8B 3C C0 B0 28 68
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End of time-nuts Digest, Vol 192, Issue 10