subject:"Re\: \[time\-nuts\] Wavecrest"

Nod, this is the problem I have, It says 110/220 but is it automatic or do I 
need to change the strapping?
I had a look at Ed Palmers excellent tear down and there were switch mode PSU 
in it.
But he has a 2077, mines a 2070 so it could be completely different, or not..
Arrgh.. I am so wanting to plug it in, unlike Ed I have a place ready for it!
I guess Oracle Palmer will be online later and will be able to provide an 
answer :)

-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf 
Of Bob Stewart
Sent: Monday, 9 September 2013 2:22 PM
To: Bob Stewart; Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Wavecrest DTS 2070

Oops.  Maybe I should have just kept my peace.  I found a User's Guide here: 
http://qmsi.com/pics/Wavecrest2070.a.pdf; which indicates it can take either 
110 or 220.  Pry open the fuse compartment and see what's in there.  Someone 
else will now probably post the right way to go about it, though.  =)


Bob - AE6RV





 From: Bob Stewart b...@evoria.net
To: Discussion of precise time and frequency measurement 
time-nuts@febo.com
Sent: Sunday, September 8, 2013 11:13 PM
Subject: Re: [time-nuts] Wavecrest DTS 2070
 

Go to a tourist supply store and buy a 110 to 230/250 transformer.  I did that 
the year I spent in France for a TV or something we took over there.  Be sure 
you get one that's big enough.  Be sure you don't wire it backwards and get 
250 to 500!!!

Bob - AE6RV






 From: Mark C. Stephens ma...@non-stop.com.au
To: time-nuts@febo.com time-nuts@febo.com
Sent: Sunday, September 8, 2013 11:05 PM
Subject: [time-nuts] Wavecrest DTS 2070
 

I just received my DTS 2070 from 110 volt land.
I live in 230 (well actually 250) volt land.

I haven't plugged it in and I am being a total wuss about breaking the CAL 
seals as they are still current.

Please help me, I really, really need to measure something with it! Anything 
with it! But to do that I need to apply power!

Is the DTS 2070 PSU auto sensing or do I need to change something?


--marki
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Re: [time-nuts] Wavecrest DTS 2070

I pried open the fuse compartment.
Both fuses black. Black as in dead short black.
Not good. Short circuit on mains input.
Open case. big thick wire carry mains to solid state relay then off to switch 
mode modules.
Relay cannot be short between supplies. Must be one or more PSU with chopper or 
bridge short.
Marki will have to be careful. Expensive and dangerous equipment at stake.


-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf 
Of Bob Stewart
Sent: Monday, 9 September 2013 2:22 PM
To: Bob Stewart; Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Wavecrest DTS 2070

Oops.  Maybe I should have just kept my peace.  I found a User's Guide here: 
http://qmsi.com/pics/Wavecrest2070.a.pdf; which indicates it can take either 
110 or 220.  Pry open the fuse compartment and see what's in there.  Someone 
else will now probably post the right way to go about it, though.  =)


Bob - AE6RV





 From: Bob Stewart b...@evoria.net
To: Discussion of precise time and frequency measurement 
time-nuts@febo.com
Sent: Sunday, September 8, 2013 11:13 PM
Subject: Re: [time-nuts] Wavecrest DTS 2070
 

Go to a tourist supply store and buy a 110 to 230/250 transformer.  I did that 
the year I spent in France for a TV or something we took over there.  Be sure 
you get one that's big enough.  Be sure you don't wire it backwards and get 
250 to 500!!!

Bob - AE6RV






 From: Mark C. Stephens ma...@non-stop.com.au
To: time-nuts@febo.com time-nuts@febo.com
Sent: Sunday, September 8, 2013 11:05 PM
Subject: [time-nuts] Wavecrest DTS 2070
 

I just received my DTS 2070 from 110 volt land.
I live in 230 (well actually 250) volt land.

I haven't plugged it in and I am being a total wuss about breaking the CAL 
seals as they are still current.

Please help me, I really, really need to measure something with it! Anything 
with it! But to do that I need to apply power!

Is the DTS 2070 PSU auto sensing or do I need to change something?


--marki
___
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https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.



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Re: [time-nuts] Wavecrest DTS 2070

After removing endless hex screws to get at the insides I find the 24V/2A PSU 
that supplies the standby voltages has what appears to be a transformer primary 
short.
Problem is, one has to remove the input board to get at the PSU screws.
Sounds easy when put like that...
I'll take some pix to show why I am so terrified of this input board.

Looking at Eds teardown on 
http://www.eevblog.com/forum/testgear/wavecrest-dts-2077-teardown/?action=dlattach;attach=58083
Ed has a single standby switch mode - the small silver slotted box with the 
yellow wires.
Mine is ancient and has 2 linear PSU, but hey, it's got the yellow wires!

Anyway I have, used my post quota for the day - nite..
Oh before I go, luckily I checked, yes all the PSU (in this model) need 
strapping for utilised input voltage.
I found a couple of expanded/exploded surface mount electro (tantalum?) caps 
on the filter board between the switch mode frame and the card cage.
I have not a clue what that means..


--marki

-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf 
Of Mark C. Stephens
Sent: Monday, 9 September 2013 6:31 PM
To: Bob Stewart; Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Wavecrest DTS 2070

I pried open the fuse compartment.
Both fuses black. Black as in dead short black.
Not good. Short circuit on mains input.
Open case. big thick wire carry mains to solid state relay then off to switch 
mode modules.
Relay cannot be short between supplies. Must be one or more PSU with chopper or 
bridge short.
Marki will have to be careful. Expensive and dangerous equipment at stake.


-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf 
Of Bob Stewart
Sent: Monday, 9 September 2013 2:22 PM
To: Bob Stewart; Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Wavecrest DTS 2070

Oops.  Maybe I should have just kept my peace.  I found a User's Guide here: 
http://qmsi.com/pics/Wavecrest2070.a.pdf; which indicates it can take either 
110 or 220.  Pry open the fuse compartment and see what's in there.  Someone 
else will now probably post the right way to go about it, though.  =)


Bob - AE6RV





 From: Bob Stewart b...@evoria.net
To: Discussion of precise time and frequency measurement 
time-nuts@febo.com
Sent: Sunday, September 8, 2013 11:13 PM
Subject: Re: [time-nuts] Wavecrest DTS 2070
 

Go to a tourist supply store and buy a 110 to 230/250 transformer.  I did that 
the year I spent in France for a TV or something we took over there.  Be sure 
you get one that's big enough.  Be sure you don't wire it backwards and get 
250 to 500!!!

Bob - AE6RV






 From: Mark C. Stephens ma...@non-stop.com.au
To: time-nuts@febo.com time-nuts@febo.com
Sent: Sunday, September 8, 2013 11:05 PM
Subject: [time-nuts] Wavecrest DTS 2070
 

I just received my DTS 2070 from 110 volt land.
I live in 230 (well actually 250) volt land.

I haven't plugged it in and I am being a total wuss about breaking the CAL 
seals as they are still current.

Please help me, I really, really need to measure something with it! Anything 
with it! But to do that I need to apply power!

Is the DTS 2070 PSU auto sensing or do I need to change something?


--marki
___
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https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.



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Re: [time-nuts] Wavecrest DTS 2070

2013-09-09 Thread Henk ten Pierick

Hi,

The 207x is. Auto sensing for the mains.

Groet,

Henk

Op 9 sep. 2013 om 11:52 heeft Mark C. Stephens ma...@non-stop.com.au het
volgende geschreven:

After removing endless hex screws to get at the insides I find the 24V/2A PSU
that supplies the standby voltages has what appears to be a transformer
primary short.
Problem is, one has to remove the input board to get at the PSU screws.
Sounds easy when put like that...
I'll take some pix to show why I am so terrified of this input board.

Looking at Eds teardown on
http://www.eevblog.com/forum/testgear/wavecrest-dts-2077-teardown/?action=dlattach;attach=58083
Ed has a single standby switch mode - the small silver slotted box with the
yellow wires.
Mine is ancient and has 2 linear PSU, but hey, it's got the yellow wires!

Anyway I have, used my post quota for the day - nite..
Oh before I go, luckily I checked, yes all the PSU (in this model) need
strapping for utilised input voltage.
I found a couple of expanded/exploded surface mount electro (tantalum?)
caps on the filter board between the switch mode frame and the card cage.
I have not a clue what that means..

--marki

-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Mark C. Stephens
Sent: Monday, 9 September 2013 6:31 PM
To: Bob Stewart; Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Wavecrest DTS 2070

I pried open the fuse compartment.
Both fuses black. Black as in dead short black.
Not good. Short circuit on mains input.
Open case. big thick wire carry mains to solid state relay then off to switch
mode modules.
Relay cannot be short between supplies. Must be one or more PSU with chopper
or bridge short.
Marki will have to be careful. Expensive and dangerous equipment at stake.

-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Bob Stewart
Sent: Monday, 9 September 2013 2:22 PM
To: Bob Stewart; Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Wavecrest DTS 2070

Oops. Maybe I should have just kept my peace. I found a User's Guide here:
http://qmsi.com/pics/Wavecrest2070.a.pdf; which indicates it can take either
110 or 220. Pry open the fuse compartment and see what's in there. Someone
else will now probably post the right way to go about it, though. =)

Bob - AE6RV

From: Bob Stewart b...@evoria.net
To: Discussion of precise time and frequency measurement
time-nuts@febo.com
Sent: Sunday, September 8, 2013 11:13 PM
Subject: Re: [time-nuts] Wavecrest DTS 2070

Go to a tourist supply store and buy a 110 to 230/250 transformer. I did
that the year I spent in France for a TV or something we took over there.
Be sure you get one that's big enough. Be sure you don't wire it backwards
and get 250 to 500!!!

Bob - AE6RV

From: Mark C. Stephens ma...@non-stop.com.au
To: time-nuts@febo.com time-nuts@febo.com
Sent: Sunday, September 8, 2013 11:05 PM
Subject: [time-nuts] Wavecrest DTS 2070

I just received my DTS 2070 from 110 volt land.
I live in 230 (well actually 250) volt land.

I haven't plugged it in and I am being a total wuss about breaking the CAL
seals as they are still current.

Please help me, I really, really need to measure something with it!
Anything with it! But to do that I need to apply power!

Is the DTS 2070 PSU auto sensing or do I need to change something?

--marki
___
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Re: [time-nuts] Wavecrest DTS 2070

Hi Henk, mine has option a110.

The linear supply is definitely strapped for 110v.

I disconnected the primary and connected a 24v system supply in its place.
Everything burst into life (at 110v, through step-down transformer)
Haven't been game to try 230v yet...

I guess I'll look at fix or replace 24v standby linear PSU.

The second linear has me scratching my head, 2V@6A and is activated by solid 
state relay.
Goes off to the card frame somewhere, haven't tried tracing yet.

Definitely not looking forward to removing that monster bottom board.

-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf 
Of Henk ten Pierick
Sent: Monday, 9 September 2013 9:05 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Wavecrest DTS 2070

Hi,

The 207x is. Auto sensing for the mains.

Groet,

Henk

Op 9 sep. 2013 om 11:52 heeft Mark C. Stephens ma...@non-stop.com.au het 
volgende geschreven:

 After removing endless hex screws to get at the insides I find the 24V/2A PSU 
 that supplies the standby voltages has what appears to be a transformer 
 primary short.
 Problem is, one has to remove the input board to get at the PSU screws.
 Sounds easy when put like that...
 I'll take some pix to show why I am so terrified of this input board.
 
 Looking at Eds teardown on 
 http://www.eevblog.com/forum/testgear/wavecrest-dts-2077-teardown/?act
 ion=dlattach;attach=58083 Ed has a single standby switch mode - the 
 small silver slotted box with the yellow wires.
 Mine is ancient and has 2 linear PSU, but hey, it's got the yellow wires!
 
 Anyway I have, used my post quota for the day - nite..
 Oh before I go, luckily I checked, yes all the PSU (in this model) need 
 strapping for utilised input voltage.
 I found a couple of expanded/exploded surface mount electro (tantalum?) 
 caps on the filter board between the switch mode frame and the card cage.
 I have not a clue what that means..
 
 
 --marki
 
 -Original Message-
 From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] 
 On Behalf Of Mark C. Stephens
 Sent: Monday, 9 September 2013 6:31 PM
 To: Bob Stewart; Discussion of precise time and frequency measurement
 Subject: Re: [time-nuts] Wavecrest DTS 2070
 
 I pried open the fuse compartment.
 Both fuses black. Black as in dead short black.
 Not good. Short circuit on mains input.
 Open case. big thick wire carry mains to solid state relay then off to switch 
 mode modules.
 Relay cannot be short between supplies. Must be one or more PSU with chopper 
 or bridge short.
 Marki will have to be careful. Expensive and dangerous equipment at stake.
 
 
 -Original Message-
 From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] 
 On Behalf Of Bob Stewart
 Sent: Monday, 9 September 2013 2:22 PM
 To: Bob Stewart; Discussion of precise time and frequency measurement
 Subject: Re: [time-nuts] Wavecrest DTS 2070
 
 Oops.  Maybe I should have just kept my peace.  I found a User's Guide 
 here: http://qmsi.com/pics/Wavecrest2070.a.pdf; which indicates it 
 can take either 110 or 220.  Pry open the fuse compartment and see 
 what's in there.  Someone else will now probably post the right way to 
 go about it, though.  =)
 
 
 Bob - AE6RV
 
 
 
 
 
 From: Bob Stewart b...@evoria.net
 To: Discussion of precise time and frequency measurement 
 time-nuts@febo.com
 Sent: Sunday, September 8, 2013 11:13 PM
 Subject: Re: [time-nuts] Wavecrest DTS 2070
 
 
 Go to a tourist supply store and buy a 110 to 230/250 transformer.  I did 
 that the year I spent in France for a TV or something we took over there.  
 Be sure you get one that's big enough.  Be sure you don't wire it backwards 
 and get 250 to 500!!!
 
 Bob - AE6RV
 
 
 
 
 
 
 From: Mark C. Stephens ma...@non-stop.com.au
 To: time-nuts@febo.com time-nuts@febo.com
 Sent: Sunday, September 8, 2013 11:05 PM
 Subject: [time-nuts] Wavecrest DTS 2070
 
 
 I just received my DTS 2070 from 110 volt land.
 I live in 230 (well actually 250) volt land.
 
 I haven't plugged it in and I am being a total wuss about breaking the CAL 
 seals as they are still current.
 
 Please help me, I really, really need to measure something with it! 
 Anything with it! But to do that I need to apply power!
 
 Is the DTS 2070 PSU auto sensing or do I need to change something?
 
 
 --marki
 ___
 time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to 
 https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
 and follow the instructions there.
 ___
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 https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
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 https

Re: [time-nuts] Wavecrest DTS 2070


Sorry, the oracle is out of the office today - I'm the janitor.  :)

I see you've already replaced the 24V supply and powered the unit up.  I 
would have removed all output connections on the supplies and tested 
them seperately.  Are you sure about that transformer short?  Remember 
that primaries on decent size line transformers only have something ike 
2 to 4  ohms resistance at most.  I wondered why yours was 12 lbs 
heavier than mine.  Linear supplies - that would do it!


The expanded/exploded capacitors could be just from age, or they could 
be from an output fault on the power supply that caused the voltage to 
go high.  That's why I would have tested both power supplies offline.


You said it's alive, but you haven't mentioned if it actually works.

By the way, it turns out that I paid dearly for my good luck with the 
repair of my 2077.  In the two weeks following that, I got a pinched 
nerve in my back that's still giving me trouble, I broke a big chunk off 
a tooth and am now scheduled for a crown at a cost of about $1000, and 
my big-screen TV died! :(


Ed


On 9/9/2013 1:01 AM, Mark C. Stephens wrote:

Nod, this is the problem I have, It says 110/220 but is it automatic or do I 
need to change the strapping?
I had a look at Ed Palmers excellent tear down and there were switch mode PSU 
in it.
But he has a 2077, mines a 2070 so it could be completely different, or not..
Arrgh.. I am so wanting to plug it in, unlike Ed I have a place ready for it!
I guess Oracle Palmer will be online later and will be able to provide an 
answer :)

-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf 
Of Bob Stewart
Sent: Monday, 9 September 2013 2:22 PM
To: Bob Stewart; Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Wavecrest DTS 2070

Oops.  Maybe I should have just kept my peace.  I found a User's Guide here: 
http://qmsi.com/pics/Wavecrest2070.a.pdf; which indicates it can take either 
110 or 220.  Pry open the fuse compartment and see what's in there.  Someone else will 
now probably post the right way to go about it, though.  =)


Bob - AE6RV



From: Bob Stewart b...@evoria.net
To: Discussion of precise time and frequency measurement
time-nuts@febo.com
Sent: Sunday, September 8, 2013 11:13 PM
Subject: Re: [time-nuts] Wavecrest DTS 2070


Go to a tourist supply store and buy a 110 to 230/250 transformer.  I did that 
the year I spent in France for a TV or something we took over there.  Be sure 
you get one that's big enough.  Be sure you don't wire it backwards and get 250 
to 500!!!

Bob - AE6RV



From: Mark C. Stephens ma...@non-stop.com.au
To: time-nuts@febo.com time-nuts@febo.com
Sent: Sunday, September 8, 2013 11:05 PM
Subject: [time-nuts] Wavecrest DTS 2070


I just received my DTS 2070 from 110 volt land.
I live in 230 (well actually 250) volt land.

I haven't plugged it in and I am being a total wuss about breaking the CAL 
seals as they are still current.

Please help me, I really, really need to measure something with it! Anything 
with it! But to do that I need to apply power!

Is the DTS 2070 PSU auto sensing or do I need to change something?


--marki




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time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.

Re: [time-nuts] Wavecrest DTS 2070

Amazing Ed, I just had a invasive discography last Thursday!
I have been a bit quiet because of a back injury too.
We must be living parallel lives, fortunately my telly is still good, my 9 year 
old son has discovered Dr. Who so we are having great time watching it :)
Some of the original series are a hoot :) so overdone but the Dalek's back then 
couldn't fly...

Only 1000 for a crown, It would be cheaper for me to fly to Canada to get crown 
My last crown was disaster as a result the clown that put the crown in stuffed 
up and the crown snapped off at the root
So added to the $2400 for the crown, I am now up for around 7K for an implant. 

The standby PSU tranny is dead short, zero ohm as compared to the 2v/6A 
supplies 8-10 ohm.
Any idea what that 2V supply is for?, If I can lose the 2 linear PSU, I'll lose 
a ton of weight, but possibly at the expense of electrical noise.
I was thinking that is why they used optics between the control board - to keep 
spurious noise to a minimum.

Yeah, I did play roulette by powering it up like that but I was a tad annoyed 
as I was told it was a working unit.
The bottom board on this one has millions of tiny surface mount caps mounted on 
there sides.
It looks terribly fragile. Much of a job to get it out?
All the PSU screw heads are under it (of course)



-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf 
Of Ed Palmer
Sent: Tuesday, 10 September 2013 1:53 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Wavecrest DTS 2070

Sorry, the oracle is out of the office today - I'm the janitor.  :)

I see you've already replaced the 24V supply and powered the unit up.  I would 
have removed all output connections on the supplies and tested them seperately. 
 Are you sure about that transformer short?  Remember that primaries on decent 
size line transformers only have something ike
2 to 4  ohms resistance at most.  I wondered why yours was 12 lbs heavier than 
mine.  Linear supplies - that would do it!

The expanded/exploded capacitors could be just from age, or they could be from 
an output fault on the power supply that caused the voltage to go high.  That's 
why I would have tested both power supplies offline.

You said it's alive, but you haven't mentioned if it actually works.

By the way, it turns out that I paid dearly for my good luck with the repair of 
my 2077.  In the two weeks following that, I got a pinched nerve in my back 
that's still giving me trouble, I broke a big chunk off a tooth and am now 
scheduled for a crown at a cost of about $1000, and my big-screen TV died! :(

Ed


On 9/9/2013 1:01 AM, Mark C. Stephens wrote:
 Nod, this is the problem I have, It says 110/220 but is it automatic or do I 
 need to change the strapping?
 I had a look at Ed Palmers excellent tear down and there were switch mode PSU 
 in it.
 But he has a 2077, mines a 2070 so it could be completely different, or not..
 Arrgh.. I am so wanting to plug it in, unlike Ed I have a place ready for it!
 I guess Oracle Palmer will be online later and will be able to provide 
 an answer :)

 -Original Message-
 From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] 
 On Behalf Of Bob Stewart
 Sent: Monday, 9 September 2013 2:22 PM
 To: Bob Stewart; Discussion of precise time and frequency measurement
 Subject: Re: [time-nuts] Wavecrest DTS 2070

 Oops.  Maybe I should have just kept my peace.  I found a User's Guide 
 here: http://qmsi.com/pics/Wavecrest2070.a.pdf; which indicates it 
 can take either 110 or 220.  Pry open the fuse compartment and see 
 what's in there.  Someone else will now probably post the right way to 
 go about it, though.  =)


 Bob - AE6RV

 
 From: Bob Stewart b...@evoria.net
 To: Discussion of precise time and frequency measurement 
 time-nuts@febo.com
 Sent: Sunday, September 8, 2013 11:13 PM
 Subject: Re: [time-nuts] Wavecrest DTS 2070


 Go to a tourist supply store and buy a 110 to 230/250 transformer.  I did 
 that the year I spent in France for a TV or something we took over there.  
 Be sure you get one that's big enough.  Be sure you don't wire it backwards 
 and get 250 to 500!!!

 Bob - AE6RV

 
 From: Mark C. Stephens ma...@non-stop.com.au
 To: time-nuts@febo.com time-nuts@febo.com
 Sent: Sunday, September 8, 2013 11:05 PM
 Subject: [time-nuts] Wavecrest DTS 2070


 I just received my DTS 2070 from 110 volt land.
 I live in 230 (well actually 250) volt land.

 I haven't plugged it in and I am being a total wuss about breaking the CAL 
 seals as they are still current.

 Please help me, I really, really need to measure something with it! 
 Anything with it! But to do that I need to apply power!

 Is the DTS 2070 PSU auto sensing or do I need to change something?


 --marki



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Re: [time-nuts] Wavecrest DTS 2070

OK now I know what a 2077 dts is. Quite the piece of test equipment.
I bet it would hurt if you dropped it on your foot.
Regards
Paul
WB8TSL/1


On Mon, Sep 9, 2013 at 2:15 PM, Mark C. Stephens ma...@non-stop.com.auwrote:

 Amazing Ed, I just had a invasive discography last Thursday!
 I have been a bit quiet because of a back injury too.
 We must be living parallel lives, fortunately my telly is still good, my 9
 year old son has discovered Dr. Who so we are having great time watching it
 :)
 Some of the original series are a hoot :) so overdone but the Dalek's back
 then couldn't fly...

 Only 1000 for a crown, It would be cheaper for me to fly to Canada to get
 crown
 My last crown was disaster as a result the clown that put the crown in
 stuffed up and the crown snapped off at the root
 So added to the $2400 for the crown, I am now up for around 7K for an
 implant.

 The standby PSU tranny is dead short, zero ohm as compared to the 2v/6A
 supplies 8-10 ohm.
 Any idea what that 2V supply is for?, If I can lose the 2 linear PSU, I'll
 lose a ton of weight, but possibly at the expense of electrical noise.
 I was thinking that is why they used optics between the control board - to
 keep spurious noise to a minimum.

 Yeah, I did play roulette by powering it up like that but I was a tad
 annoyed as I was told it was a working unit.
 The bottom board on this one has millions of tiny surface mount caps
 mounted on there sides.
 It looks terribly fragile. Much of a job to get it out?
 All the PSU screw heads are under it (of course)



 -Original Message-
 From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
 Behalf Of Ed Palmer
 Sent: Tuesday, 10 September 2013 1:53 AM
 To: Discussion of precise time and frequency measurement
 Subject: Re: [time-nuts] Wavecrest DTS 2070

 Sorry, the oracle is out of the office today - I'm the janitor.  :)

 I see you've already replaced the 24V supply and powered the unit up.  I
 would have removed all output connections on the supplies and tested them
 seperately.  Are you sure about that transformer short?  Remember that
 primaries on decent size line transformers only have something ike
 2 to 4  ohms resistance at most.  I wondered why yours was 12 lbs heavier
 than mine.  Linear supplies - that would do it!

 The expanded/exploded capacitors could be just from age, or they could be
 from an output fault on the power supply that caused the voltage to go
 high.  That's why I would have tested both power supplies offline.

 You said it's alive, but you haven't mentioned if it actually works.

 By the way, it turns out that I paid dearly for my good luck with the
 repair of my 2077.  In the two weeks following that, I got a pinched nerve
 in my back that's still giving me trouble, I broke a big chunk off a tooth
 and am now scheduled for a crown at a cost of about $1000, and my
 big-screen TV died! :(

 Ed


 On 9/9/2013 1:01 AM, Mark C. Stephens wrote:
  Nod, this is the problem I have, It says 110/220 but is it automatic or
 do I need to change the strapping?
  I had a look at Ed Palmers excellent tear down and there were switch
 mode PSU in it.
  But he has a 2077, mines a 2070 so it could be completely different, or
 not..
  Arrgh.. I am so wanting to plug it in, unlike Ed I have a place ready
 for it!
  I guess Oracle Palmer will be online later and will be able to provide
  an answer :)
 
  -Original Message-
  From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com]
  On Behalf Of Bob Stewart
  Sent: Monday, 9 September 2013 2:22 PM
  To: Bob Stewart; Discussion of precise time and frequency measurement
  Subject: Re: [time-nuts] Wavecrest DTS 2070
 
  Oops.  Maybe I should have just kept my peace.  I found a User's Guide
  here: http://qmsi.com/pics/Wavecrest2070.a.pdf; which indicates it
  can take either 110 or 220.  Pry open the fuse compartment and see
  what's in there.  Someone else will now probably post the right way to
  go about it, though.  =)
 
 
  Bob - AE6RV
 
  
  From: Bob Stewart b...@evoria.net
  To: Discussion of precise time and frequency measurement
  time-nuts@febo.com
  Sent: Sunday, September 8, 2013 11:13 PM
  Subject: Re: [time-nuts] Wavecrest DTS 2070
 
 
  Go to a tourist supply store and buy a 110 to 230/250 transformer.  I
 did that the year I spent in France for a TV or something we took over
 there.  Be sure you get one that's big enough.  Be sure you don't wire it
 backwards and get 250 to 500!!!
 
  Bob - AE6RV
 
  
  From: Mark C. Stephens ma...@non-stop.com.au
  To: time-nuts@febo.com time-nuts@febo.com
  Sent: Sunday, September 8, 2013 11:05 PM
  Subject: [time-nuts] Wavecrest DTS 2070
 
 
  I just received my DTS 2070 from 110 volt land.
  I live in 230 (well actually 250) volt land.
 
  I haven't plugged it in and I am being a total wuss about breaking the
 CAL seals as they are still current.
 
  Please help me, I

Re: [time-nuts] Wavecrest DTS 2070


Hi Marki,

On 9/9/2013 12:15 PM, Mark C. Stephens wrote:

Amazing Ed, I just had a invasive discography last Thursday!
I have been a bit quiet because of a back injury too.


You're creeping me out Marki!


We must be living parallel lives, fortunately my telly is still good, my 9 year 
old son has discovered Dr. Who so we are having great time watching it :)
Some of the original series are a hoot :) so overdone but the Dalek's back then 
couldn't fly...


I remember watching it when it was new in the early '60's.  Scary.


Only 1000 for a crown, It would be cheaper for me to fly to Canada to get crown
My last crown was disaster as a result the clown that put the crown in stuffed 
up and the crown snapped off at the root
So added to the $2400 for the crown, I am now up for around 7K for an implant.


Geez, I hope I don't follow in your footsteps!  Your 'parallel lives' 
comment now has me really worried.



The standby PSU tranny is dead short, zero ohm as compared to the 2v/6A 
supplies 8-10 ohm.
Any idea what that 2V supply is for?,


Sorry, no clue.  But my mainboard has a +2.1 volt test point so there's 
certainly a 'family resemblance' between our units.  Mine must generate 
the +2.1 volts on the mainboard.



If I can lose the 2 linear PSU, I'll lose a ton of weight, but possibly at the 
expense of electrical noise.
I was thinking that is why they used optics between the control board - to keep 
spurious noise to a minimum.


Yes, but I would have thought that optoisolators would have been cheaper 
than optical transmitters, receivers, and cables.



Yeah, I did play roulette by powering it up like that but I was a tad annoyed 
as I was told it was a working unit.
The bottom board on this one has millions of tiny surface mount caps mounted on 
there sides.
It looks terribly fragile. Much of a job to get it out?


Well, I described my process in the teardown.  Is your board similar?  
Other than the front panel stuff, board removal is just a matter of 
unplugging connectors and unscrewing the mounting screws.



All the PSU screw heads are under it (of course)


Yup.  I needed to get at the mounting screws for the cardcage so that I 
could inspect the motherboard.


Ed


-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf 
Of Ed Palmer
Sent: Tuesday, 10 September 2013 1:53 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Wavecrest DTS 2070

Sorry, the oracle is out of the office today - I'm the janitor.  :)

I see you've already replaced the 24V supply and powered the unit up.  I would 
have removed all output connections on the supplies and tested them seperately. 
 Are you sure about that transformer short?  Remember that primaries on decent 
size line transformers only have something ike
2 to 4  ohms resistance at most.  I wondered why yours was 12 lbs heavier than 
mine.  Linear supplies - that would do it!

The expanded/exploded capacitors could be just from age, or they could be from 
an output fault on the power supply that caused the voltage to go high.  That's 
why I would have tested both power supplies offline.

You said it's alive, but you haven't mentioned if it actually works.

By the way, it turns out that I paid dearly for my good luck with the repair of 
my 2077.  In the two weeks following that, I got a pinched nerve in my back 
that's still giving me trouble, I broke a big chunk off a tooth and am now 
scheduled for a crown at a cost of about $1000, and my big-screen TV died! :(

Ed


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and follow the instructions there.

Re: [time-nuts] Wavecrest DTS 2070

2.1 volt hmm maybe they are doing something with ECL. Say the common logic
was 3.3 V adding a -2.1 would get you close to the 5.2V of ECL. Though
these look new enough that ECL should not be in the mix.
Regards
Paul
WB8TSL


On Mon, Sep 9, 2013 at 2:54 PM, Ed Palmer ed_pal...@sasktel.net wrote:

 Hi Marki,


 On 9/9/2013 12:15 PM, Mark C. Stephens wrote:

 Amazing Ed, I just had a invasive discography last Thursday!
 I have been a bit quiet because of a back injury too.


 You're creeping me out Marki!


  We must be living parallel lives, fortunately my telly is still good, my
 9 year old son has discovered Dr. Who so we are having great time watching
 it :)
 Some of the original series are a hoot :) so overdone but the Dalek's
 back then couldn't fly...


 I remember watching it when it was new in the early '60's.  Scary.


  Only 1000 for a crown, It would be cheaper for me to fly to Canada to get
 crown
 My last crown was disaster as a result the clown that put the crown in
 stuffed up and the crown snapped off at the root
 So added to the $2400 for the crown, I am now up for around 7K for an
 implant.


 Geez, I hope I don't follow in your footsteps!  Your 'parallel lives'
 comment now has me really worried.


  The standby PSU tranny is dead short, zero ohm as compared to the 2v/6A
 supplies 8-10 ohm.
 Any idea what that 2V supply is for?,


 Sorry, no clue.  But my mainboard has a +2.1 volt test point so there's
 certainly a 'family resemblance' between our units.  Mine must generate the
 +2.1 volts on the mainboard.


  If I can lose the 2 linear PSU, I'll lose a ton of weight, but possibly
 at the expense of electrical noise.
 I was thinking that is why they used optics between the control board -
 to keep spurious noise to a minimum.


 Yes, but I would have thought that optoisolators would have been cheaper
 than optical transmitters, receivers, and cables.


  Yeah, I did play roulette by powering it up like that but I was a tad
 annoyed as I was told it was a working unit.
 The bottom board on this one has millions of tiny surface mount caps
 mounted on there sides.
 It looks terribly fragile. Much of a job to get it out?


 Well, I described my process in the teardown.  Is your board similar?
  Other than the front panel stuff, board removal is just a matter of
 unplugging connectors and unscrewing the mounting screws.


  All the PSU screw heads are under it (of course)


 Yup.  I needed to get at the mounting screws for the cardcage so that I
 could inspect the motherboard.

 Ed


  -Original Message-
 From: time-nuts-boun...@febo.com 
 [mailto:time-nuts-bounces@**febo.comtime-nuts-boun...@febo.com]
 On Behalf Of Ed Palmer
 Sent: Tuesday, 10 September 2013 1:53 AM
 To: Discussion of precise time and frequency measurement
 Subject: Re: [time-nuts] Wavecrest DTS 2070

 Sorry, the oracle is out of the office today - I'm the janitor.  :)

 I see you've already replaced the 24V supply and powered the unit up.  I
 would have removed all output connections on the supplies and tested them
 seperately.  Are you sure about that transformer short?  Remember that
 primaries on decent size line transformers only have something ike
 2 to 4  ohms resistance at most.  I wondered why yours was 12 lbs heavier
 than mine.  Linear supplies - that would do it!

 The expanded/exploded capacitors could be just from age, or they could be
 from an output fault on the power supply that caused the voltage to go
 high.  That's why I would have tested both power supplies offline.

 You said it's alive, but you haven't mentioned if it actually works.

 By the way, it turns out that I paid dearly for my good luck with the
 repair of my 2077.  In the two weeks following that, I got a pinched nerve
 in my back that's still giving me trouble, I broke a big chunk off a tooth
 and am now scheduled for a crown at a cost of about $1000, and my
 big-screen TV died! :(

 Ed

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 To unsubscribe, go to https://www.febo.com/cgi-bin/**
 mailman/listinfo/time-nutshttps://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
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Re: [time-nuts] Wavecrest DTS 2070

2013-09-09 Thread Bruce Griffiths

Possibly +2V for ECL Vcc and -3.2V for ECL Vee allowing it to drive 50 
ohm loads connected to ground.
Otherwise with 0V Vcc and -5.2V Vee the ECL loads must be connected to 
-2V (or its Thevenin equivalent)


Bruce

paul swed wrote:

2.1 volt hmm maybe they are doing something with ECL. Say the common logic
was 3.3 V adding a -2.1 would get you close to the 5.2V of ECL. Though
these look new enough that ECL should not be in the mix.
Regards
Paul
WB8TSL


On Mon, Sep 9, 2013 at 2:54 PM, Ed Palmered_pal...@sasktel.net  wrote:

   

Hi Marki,


On 9/9/2013 12:15 PM, Mark C. Stephens wrote:

 

Amazing Ed, I just had a invasive discography last Thursday!
I have been a bit quiet because of a back injury too.

   

You're creeping me out Marki!


  We must be living parallel lives, fortunately my telly is still good, my
 

9 year old son has discovered Dr. Who so we are having great time watching
it :)
Some of the original series are a hoot :) so overdone but the Dalek's
back then couldn't fly...

   

I remember watching it when it was new in the early '60's.  Scary.


  Only 1000 for a crown, It would be cheaper for me to fly to Canada to get
 

crown
My last crown was disaster as a result the clown that put the crown in
stuffed up and the crown snapped off at the root
So added to the $2400 for the crown, I am now up for around 7K for an
implant.

   

Geez, I hope I don't follow in your footsteps!  Your 'parallel lives'
comment now has me really worried.


  The standby PSU tranny is dead short, zero ohm as compared to the 2v/6A
 

supplies 8-10 ohm.
Any idea what that 2V supply is for?,

   

Sorry, no clue.  But my mainboard has a +2.1 volt test point so there's
certainly a 'family resemblance' between our units.  Mine must generate the
+2.1 volts on the mainboard.


  If I can lose the 2 linear PSU, I'll lose a ton of weight, but possibly
 

at the expense of electrical noise.
I was thinking that is why they used optics between the control board -
to keep spurious noise to a minimum.

   

Yes, but I would have thought that optoisolators would have been cheaper
than optical transmitters, receivers, and cables.


  Yeah, I did play roulette by powering it up like that but I was a tad
 

annoyed as I was told it was a working unit.
The bottom board on this one has millions of tiny surface mount caps
mounted on there sides.
It looks terribly fragile. Much of a job to get it out?

   

Well, I described my process in the teardown.  Is your board similar?
  Other than the front panel stuff, board removal is just a matter of
unplugging connectors and unscrewing the mounting screws.


  All the PSU screw heads are under it (of course)
 
   

Yup.  I needed to get at the mounting screws for the cardcage so that I
could inspect the motherboard.

Ed


  -Original Message-
 

From: time-nuts-boun...@febo.com 
[mailto:time-nuts-bounces@**febo.comtime-nuts-boun...@febo.com]
On Behalf Of Ed Palmer
Sent: Tuesday, 10 September 2013 1:53 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Wavecrest DTS 2070

Sorry, the oracle is out of the office today - I'm the janitor.  :)

I see you've already replaced the 24V supply and powered the unit up.  I
would have removed all output connections on the supplies and tested them
seperately.  Are you sure about that transformer short?  Remember that
primaries on decent size line transformers only have something ike
2 to 4  ohms resistance at most.  I wondered why yours was 12 lbs heavier
than mine.  Linear supplies - that would do it!

The expanded/exploded capacitors could be just from age, or they could be
from an output fault on the power supply that caused the voltage to go
high.  That's why I would have tested both power supplies offline.

You said it's alive, but you haven't mentioned if it actually works.

By the way, it turns out that I paid dearly for my good luck with the
repair of my 2077.  In the two weeks following that, I got a pinched nerve
in my back that's still giving me trouble, I broke a big chunk off a tooth
and am now scheduled for a crown at a cost of about $1000, and my
big-screen TV died! :(

Ed

  __**_
   

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To unsubscribe, go to https://www.febo.com/cgi-bin/**
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Re: [time-nuts] Wavecrest DTS 2070

I think there's lots of ECL in this thing.  In 2012, Richard H McCorkle 
said that US Patent #6226231 was for part of the DTS-2075.  It shows 
lots of ECL.  My unit dates from around 2000 and doesn't have an obvious 
3V3 supply, only 5V, 15V, and 24V.  One of the 5V supplies might be 
adjusted for 5V2 and wired for negative voltage.  I didn't check that.


Ed

On 9/9/2013 1:16 PM, paul swed wrote:

2.1 volt hmm maybe they are doing something with ECL. Say the common logic
was 3.3 V adding a -2.1 would get you close to the 5.2V of ECL. Though
these look new enough that ECL should not be in the mix.
Regards
Paul
WB8TSL


On Mon, Sep 9, 2013 at 2:54 PM, Ed Palmer ed_pal...@sasktel.net wrote:


Hi Marki,


On 9/9/2013 12:15 PM, Mark C. Stephens wrote:


Amazing Ed, I just had a invasive discography last Thursday!
I have been a bit quiet because of a back injury too.


You're creeping me out Marki!


  We must be living parallel lives, fortunately my telly is still good, my

9 year old son has discovered Dr. Who so we are having great time watching
it :)
Some of the original series are a hoot :) so overdone but the Dalek's
back then couldn't fly...


I remember watching it when it was new in the early '60's.  Scary.


  Only 1000 for a crown, It would be cheaper for me to fly to Canada to get

crown
My last crown was disaster as a result the clown that put the crown in
stuffed up and the crown snapped off at the root
So added to the $2400 for the crown, I am now up for around 7K for an
implant.


Geez, I hope I don't follow in your footsteps!  Your 'parallel lives'
comment now has me really worried.


  The standby PSU tranny is dead short, zero ohm as compared to the 2v/6A

supplies 8-10 ohm.
Any idea what that 2V supply is for?,


Sorry, no clue.  But my mainboard has a +2.1 volt test point so there's
certainly a 'family resemblance' between our units.  Mine must generate the
+2.1 volts on the mainboard.


  If I can lose the 2 linear PSU, I'll lose a ton of weight, but possibly

at the expense of electrical noise.
I was thinking that is why they used optics between the control board -
to keep spurious noise to a minimum.


Yes, but I would have thought that optoisolators would have been cheaper
than optical transmitters, receivers, and cables.


  Yeah, I did play roulette by powering it up like that but I was a tad

annoyed as I was told it was a working unit.
The bottom board on this one has millions of tiny surface mount caps
mounted on there sides.
It looks terribly fragile. Much of a job to get it out?


Well, I described my process in the teardown.  Is your board similar?
  Other than the front panel stuff, board removal is just a matter of
unplugging connectors and unscrewing the mounting screws.


  All the PSU screw heads are under it (of course)
Yup.  I needed to get at the mounting screws for the cardcage so that I
could inspect the motherboard.

Ed


  -Original Message-

From: time-nuts-boun...@febo.com 
[mailto:time-nuts-bounces@**febo.comtime-nuts-boun...@febo.com]
On Behalf Of Ed Palmer
Sent: Tuesday, 10 September 2013 1:53 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Wavecrest DTS 2070

Sorry, the oracle is out of the office today - I'm the janitor.  :)

I see you've already replaced the 24V supply and powered the unit up.  I
would have removed all output connections on the supplies and tested them
seperately.  Are you sure about that transformer short?  Remember that
primaries on decent size line transformers only have something ike
2 to 4  ohms resistance at most.  I wondered why yours was 12 lbs heavier
than mine.  Linear supplies - that would do it!

The expanded/exploded capacitors could be just from age, or they could be
from an output fault on the power supply that caused the voltage to go
high.  That's why I would have tested both power supplies offline.

You said it's alive, but you haven't mentioned if it actually works.

By the way, it turns out that I paid dearly for my good luck with the
repair of my 2077.  In the two weeks following that, I got a pinched nerve
in my back that's still giving me trouble, I broke a big chunk off a tooth
and am now scheduled for a crown at a cost of about $1000, and my
big-screen TV died! :(

Ed


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and follow the instructions there.

Re: [time-nuts] Wavecrest DTS 2070

Just trying to figure out why a 2V power supply pretty curious.
Regards
Paul.


On Mon, Sep 9, 2013 at 3:57 PM, Ed Palmer ed_pal...@sasktel.net wrote:

 I think there's lots of ECL in this thing.  In 2012, Richard H McCorkle
 said that US Patent #6226231 was for part of the DTS-2075.  It shows lots
 of ECL.  My unit dates from around 2000 and doesn't have an obvious 3V3
 supply, only 5V, 15V, and 24V.  One of the 5V supplies might be adjusted
 for 5V2 and wired for negative voltage.  I didn't check that.

 Ed


 On 9/9/2013 1:16 PM, paul swed wrote:

 2.1 volt hmm maybe they are doing something with ECL. Say the common logic
 was 3.3 V adding a -2.1 would get you close to the 5.2V of ECL. Though
 these look new enough that ECL should not be in the mix.
 Regards
 Paul
 WB8TSL


 On Mon, Sep 9, 2013 at 2:54 PM, Ed Palmer ed_pal...@sasktel.net wrote:

  Hi Marki,


 On 9/9/2013 12:15 PM, Mark C. Stephens wrote:

  Amazing Ed, I just had a invasive discography last Thursday!
 I have been a bit quiet because of a back injury too.

  You're creeping me out Marki!


   We must be living parallel lives, fortunately my telly is still good,
 my

 9 year old son has discovered Dr. Who so we are having great time
 watching
 it :)
 Some of the original series are a hoot :) so overdone but the Dalek's
 back then couldn't fly...

  I remember watching it when it was new in the early '60's.  Scary.


   Only 1000 for a crown, It would be cheaper for me to fly to Canada to
 get

 crown
 My last crown was disaster as a result the clown that put the crown in
 stuffed up and the crown snapped off at the root
 So added to the $2400 for the crown, I am now up for around 7K for an
 implant.

  Geez, I hope I don't follow in your footsteps!  Your 'parallel lives'
 comment now has me really worried.


   The standby PSU tranny is dead short, zero ohm as compared to the 2v/6A

 supplies 8-10 ohm.
 Any idea what that 2V supply is for?,

  Sorry, no clue.  But my mainboard has a +2.1 volt test point so there's
 certainly a 'family resemblance' between our units.  Mine must generate
 the
 +2.1 volts on the mainboard.


   If I can lose the 2 linear PSU, I'll lose a ton of weight, but possibly

 at the expense of electrical noise.
 I was thinking that is why they used optics between the control board -
 to keep spurious noise to a minimum.

  Yes, but I would have thought that optoisolators would have been
 cheaper
 than optical transmitters, receivers, and cables.


   Yeah, I did play roulette by powering it up like that but I was a tad

 annoyed as I was told it was a working unit.
 The bottom board on this one has millions of tiny surface mount caps
 mounted on there sides.
 It looks terribly fragile. Much of a job to get it out?

  Well, I described my process in the teardown.  Is your board similar?
   Other than the front panel stuff, board removal is just a matter of
 unplugging connectors and unscrewing the mounting screws.


   All the PSU screw heads are under it (of course)
 Yup.  I needed to get at the mounting screws for the cardcage so that I
 could inspect the motherboard.

 Ed


   -Original Message-

 From: time-nuts-boun...@febo.com 
 [mailto:time-nuts-bounces@**fe**bo.comhttp://febo.com
 time-nuts-bounces@febo.**com time-nuts-boun...@febo.com]

 On Behalf Of Ed Palmer
 Sent: Tuesday, 10 September 2013 1:53 AM
 To: Discussion of precise time and frequency measurement
 Subject: Re: [time-nuts] Wavecrest DTS 2070

 Sorry, the oracle is out of the office today - I'm the janitor.  :)

 I see you've already replaced the 24V supply and powered the unit up.  I
 would have removed all output connections on the supplies and tested
 them
 seperately.  Are you sure about that transformer short?  Remember that
 primaries on decent size line transformers only have something ike
 2 to 4  ohms resistance at most.  I wondered why yours was 12 lbs
 heavier
 than mine.  Linear supplies - that would do it!

 The expanded/exploded capacitors could be just from age, or they could
 be
 from an output fault on the power supply that caused the voltage to go
 high.  That's why I would have tested both power supplies offline.

 You said it's alive, but you haven't mentioned if it actually works.

 By the way, it turns out that I paid dearly for my good luck with the
 repair of my 2077.  In the two weeks following that, I got a pinched
 nerve
 in my back that's still giving me trouble, I broke a big chunk off a
 tooth
 and am now scheduled for a crown at a cost of about $1000, and my
 big-screen TV died! :(

 Ed

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Re: [time-nuts] Wavecrest DTS 2070

2013-09-09 Thread Pete Lancashire

-2V is a common terminator voltage for ECL

In my days before gray hair I worked on a machine that for each rack had a
200A -2V power supply, a fully configured system had over 20 racks.




On Mon, Sep 9, 2013 at 1:19 PM, paul swed paulsw...@gmail.com wrote:

 Just trying to figure out why a 2V power supply pretty curious.
 Regards
 Paul.


 On Mon, Sep 9, 2013 at 3:57 PM, Ed Palmer ed_pal...@sasktel.net wrote:

  I think there's lots of ECL in this thing.  In 2012, Richard H McCorkle
  said that US Patent #6226231 was for part of the DTS-2075.  It shows lots
  of ECL.  My unit dates from around 2000 and doesn't have an obvious 3V3
  supply, only 5V, 15V, and 24V.  One of the 5V supplies might be adjusted
  for 5V2 and wired for negative voltage.  I didn't check that.
 
  Ed
 
 
  On 9/9/2013 1:16 PM, paul swed wrote:
 
  2.1 volt hmm maybe they are doing something with ECL. Say the common
 logic
  was 3.3 V adding a -2.1 would get you close to the 5.2V of ECL. Though
  these look new enough that ECL should not be in the mix.
  Regards
  Paul
  WB8TSL
 
 
  On Mon, Sep 9, 2013 at 2:54 PM, Ed Palmer ed_pal...@sasktel.net
 wrote:
 
   Hi Marki,
 
 
  On 9/9/2013 12:15 PM, Mark C. Stephens wrote:
 
   Amazing Ed, I just had a invasive discography last Thursday!
  I have been a bit quiet because of a back injury too.
 
   You're creeping me out Marki!
 
 
We must be living parallel lives, fortunately my telly is still good,
  my
 
  9 year old son has discovered Dr. Who so we are having great time
  watching
  it :)
  Some of the original series are a hoot :) so overdone but the Dalek's
  back then couldn't fly...
 
   I remember watching it when it was new in the early '60's.  Scary.
 
 
Only 1000 for a crown, It would be cheaper for me to fly to Canada to
  get
 
  crown
  My last crown was disaster as a result the clown that put the crown in
  stuffed up and the crown snapped off at the root
  So added to the $2400 for the crown, I am now up for around 7K for an
  implant.
 
   Geez, I hope I don't follow in your footsteps!  Your 'parallel lives'
  comment now has me really worried.
 
 
The standby PSU tranny is dead short, zero ohm as compared to the
 2v/6A
 
  supplies 8-10 ohm.
  Any idea what that 2V supply is for?,
 
   Sorry, no clue.  But my mainboard has a +2.1 volt test point so
 there's
  certainly a 'family resemblance' between our units.  Mine must generate
  the
  +2.1 volts on the mainboard.
 
 
If I can lose the 2 linear PSU, I'll lose a ton of weight, but
 possibly
 
  at the expense of electrical noise.
  I was thinking that is why they used optics between the control board
 -
  to keep spurious noise to a minimum.
 
   Yes, but I would have thought that optoisolators would have been
  cheaper
  than optical transmitters, receivers, and cables.
 
 
Yeah, I did play roulette by powering it up like that but I was a tad
 
  annoyed as I was told it was a working unit.
  The bottom board on this one has millions of tiny surface mount caps
  mounted on there sides.
  It looks terribly fragile. Much of a job to get it out?
 
   Well, I described my process in the teardown.  Is your board similar?
Other than the front panel stuff, board removal is just a matter of
  unplugging connectors and unscrewing the mounting screws.
 
 
All the PSU screw heads are under it (of course)
  Yup.  I needed to get at the mounting screws for the cardcage so that I
  could inspect the motherboard.
 
  Ed
 
 
-Original Message-
 
  From: time-nuts-boun...@febo.com [mailto:time-nuts-bounces@**fe**
 bo.comhttp://febo.com
  time-nuts-bounces@febo.**com time-nuts-boun...@febo.com]
 
  On Behalf Of Ed Palmer
  Sent: Tuesday, 10 September 2013 1:53 AM
  To: Discussion of precise time and frequency measurement
  Subject: Re: [time-nuts] Wavecrest DTS 2070
 
  Sorry, the oracle is out of the office today - I'm the janitor.  :)
 
  I see you've already replaced the 24V supply and powered the unit up.
  I
  would have removed all output connections on the supplies and tested
  them
  seperately.  Are you sure about that transformer short?  Remember that
  primaries on decent size line transformers only have something ike
  2 to 4  ohms resistance at most.  I wondered why yours was 12 lbs
  heavier
  than mine.  Linear supplies - that would do it!
 
  The expanded/exploded capacitors could be just from age, or they could
  be
  from an output fault on the power supply that caused the voltage to go
  high.  That's why I would have tested both power supplies offline.
 
  You said it's alive, but you haven't mentioned if it actually works.
 
  By the way, it turns out that I paid dearly for my good luck with the
  repair of my 2077.  In the two weeks following that, I got a pinched
  nerve
  in my back that's still giving me trouble, I broke a big chunk off a
  tooth
  and am now scheduled for a crown at a cost of about $1000, and my
  big-screen TV died! :(
 
  Ed

Re: [time-nuts] Wavecrest DTS 2070

Yes indeed it would be reasonable.
The good news is that if you have a dead short supply for 2V those are the
easiest to troubleshoot. Fixed numbers of pieces of test equipment because
of faulty caps that shorted.


On Mon, Sep 9, 2013 at 4:42 PM, Ed Palmer ed_pal...@sasktel.net wrote:

 That's possible.  The only outputs are the CAL1 and CAL2 signals which are
 square waves at -0V4 and -0v8 into 50 ohms at 8KHz, 1MHz, or 200MHz and the
 oscillator monitor output at 100 MHz.  My spectrum analyzer suggests that
 it's a square wave.  The DTS measures it as +0V2124 and -0V2154.  It
 wouldn't be hard to generate the -3V2 for those locally from -5V0.

 Ed


 On 9/9/2013 1:43 PM, Bruce Griffiths wrote:

 Possibly +2V for ECL Vcc and -3.2V for ECL Vee allowing it to drive 50
 ohm loads connected to ground.
 Otherwise with 0V Vcc and -5.2V Vee the ECL loads must be connected to
 -2V (or its Thevenin equivalent)

 Bruce

 paul swed wrote:

 2.1 volt hmm maybe they are doing something with ECL. Say the common
 logic
 was 3.3 V adding a -2.1 would get you close to the 5.2V of ECL. Though
 these look new enough that ECL should not be in the mix.
 Regards
 Paul
 WB8TSL


 On Mon, Sep 9, 2013 at 2:54 PM, Ed Palmered_pal...@sasktel.net  wrote:

  Hi Marki,


 On 9/9/2013 12:15 PM, Mark C. Stephens wrote:

  Amazing Ed, I just had a invasive discography last Thursday!
 I have been a bit quiet because of a back injury too.

  You're creeping me out Marki!


   We must be living parallel lives, fortunately my telly is still good,
 my

 9 year old son has discovered Dr. Who so we are having great time
 watching
 it :)
 Some of the original series are a hoot :) so overdone but the Dalek's
 back then couldn't fly...

  I remember watching it when it was new in the early '60's. Scary.


   Only 1000 for a crown, It would be cheaper for me to fly to Canada to
 get

 crown
 My last crown was disaster as a result the clown that put the crown in
 stuffed up and the crown snapped off at the root
 So added to the $2400 for the crown, I am now up for around 7K for an
 implant.

  Geez, I hope I don't follow in your footsteps!  Your 'parallel lives'
 comment now has me really worried.


   The standby PSU tranny is dead short, zero ohm as compared to the
 2v/6A

 supplies 8-10 ohm.
 Any idea what that 2V supply is for?,

  Sorry, no clue.  But my mainboard has a +2.1 volt test point so
 there's
 certainly a 'family resemblance' between our units.  Mine must generate
 the
 +2.1 volts on the mainboard.


   If I can lose the 2 linear PSU, I'll lose a ton of weight, but
 possibly

 at the expense of electrical noise.
 I was thinking that is why they used optics between the control board -
 to keep spurious noise to a minimum.

  Yes, but I would have thought that optoisolators would have been
 cheaper
 than optical transmitters, receivers, and cables.


   Yeah, I did play roulette by powering it up like that but I was a tad

 annoyed as I was told it was a working unit.
 The bottom board on this one has millions of tiny surface mount caps
 mounted on there sides.
 It looks terribly fragile. Much of a job to get it out?

  Well, I described my process in the teardown.  Is your board similar?
   Other than the front panel stuff, board removal is just a matter of
 unplugging connectors and unscrewing the mounting screws.


   All the PSU screw heads are under it (of course)
 Yup.  I needed to get at the mounting screws for the cardcage so that I
 could inspect the motherboard.

 Ed


   -Original Message-

 From: time-nuts-boun...@febo.com [mailto:time-nuts-bounces@**fe**
 bo.com 
 http://febo.comtime-nuts-bounces@febo.**comtime-nuts-boun...@febo.com
 ]
 On Behalf Of Ed Palmer
 Sent: Tuesday, 10 September 2013 1:53 AM
 To: Discussion of precise time and frequency measurement
 Subject: Re: [time-nuts] Wavecrest DTS 2070

 Sorry, the oracle is out of the office today - I'm the janitor.  :)

 I see you've already replaced the 24V supply and powered the unit up.
  I
 would have removed all output connections on the supplies and tested
 them
 seperately.  Are you sure about that transformer short? Remember that
 primaries on decent size line transformers only have something ike
 2 to 4  ohms resistance at most.  I wondered why yours was 12 lbs
 heavier
 than mine.  Linear supplies - that would do it!

 The expanded/exploded capacitors could be just from age, or they could
 be
 from an output fault on the power supply that caused the voltage to go
 high.  That's why I would have tested both power supplies offline.

 You said it's alive, but you haven't mentioned if it actually works.

 By the way, it turns out that I paid dearly for my good luck with the
 repair of my 2077.  In the two weeks following that, I got a pinched
 nerve
 in my back that's still giving me trouble, I broke a big chunk off a
 tooth
 and am now scheduled for a crown at a cost of about $1000, and my
 big-screen TV died! :(

 Ed

Re: [time-nuts] Wavecrest DTS 2070

That's possible.  The only outputs are the CAL1 and CAL2 signals which 
are square waves at -0V4 and -0v8 into 50 ohms at 8KHz, 1MHz, or 200MHz 
and the oscillator monitor output at 100 MHz.  My spectrum analyzer 
suggests that it's a square wave.  The DTS measures it as +0V2124 and 
-0V2154.  It wouldn't be hard to generate the -3V2 for those locally 
from -5V0.


Ed

On 9/9/2013 1:43 PM, Bruce Griffiths wrote:
Possibly +2V for ECL Vcc and -3.2V for ECL Vee allowing it to drive 50 
ohm loads connected to ground.
Otherwise with 0V Vcc and -5.2V Vee the ECL loads must be connected to 
-2V (or its Thevenin equivalent)


Bruce

paul swed wrote:
2.1 volt hmm maybe they are doing something with ECL. Say the common 
logic

was 3.3 V adding a -2.1 would get you close to the 5.2V of ECL. Though
these look new enough that ECL should not be in the mix.
Regards
Paul
WB8TSL


On Mon, Sep 9, 2013 at 2:54 PM, Ed Palmered_pal...@sasktel.net  wrote:


Hi Marki,


On 9/9/2013 12:15 PM, Mark C. Stephens wrote:


Amazing Ed, I just had a invasive discography last Thursday!
I have been a bit quiet because of a back injury too.


You're creeping me out Marki!


  We must be living parallel lives, fortunately my telly is still 
good, my
9 year old son has discovered Dr. Who so we are having great time 
watching

it :)
Some of the original series are a hoot :) so overdone but the Dalek's
back then couldn't fly...


I remember watching it when it was new in the early '60's. Scary.


  Only 1000 for a crown, It would be cheaper for me to fly to Canada 
to get

crown
My last crown was disaster as a result the clown that put the crown in
stuffed up and the crown snapped off at the root
So added to the $2400 for the crown, I am now up for around 7K for an
implant.


Geez, I hope I don't follow in your footsteps!  Your 'parallel lives'
comment now has me really worried.


  The standby PSU tranny is dead short, zero ohm as compared to the 
2v/6A

supplies 8-10 ohm.
Any idea what that 2V supply is for?,


Sorry, no clue.  But my mainboard has a +2.1 volt test point so there's
certainly a 'family resemblance' between our units.  Mine must 
generate the

+2.1 volts on the mainboard.


  If I can lose the 2 linear PSU, I'll lose a ton of weight, but 
possibly

at the expense of electrical noise.
I was thinking that is why they used optics between the control 
board -

to keep spurious noise to a minimum.

Yes, but I would have thought that optoisolators would have been 
cheaper

than optical transmitters, receivers, and cables.


  Yeah, I did play roulette by powering it up like that but I was a tad

annoyed as I was told it was a working unit.
The bottom board on this one has millions of tiny surface mount caps
mounted on there sides.
It looks terribly fragile. Much of a job to get it out?


Well, I described my process in the teardown.  Is your board similar?
  Other than the front panel stuff, board removal is just a matter of
unplugging connectors and unscrewing the mounting screws.


  All the PSU screw heads are under it (of course)
Yup.  I needed to get at the mounting screws for the cardcage so that I
could inspect the motherboard.

Ed


  -Original Message-
From: time-nuts-boun...@febo.com 
[mailto:time-nuts-bounces@**febo.comtime-nuts-boun...@febo.com]

On Behalf Of Ed Palmer
Sent: Tuesday, 10 September 2013 1:53 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Wavecrest DTS 2070

Sorry, the oracle is out of the office today - I'm the janitor.  :)

I see you've already replaced the 24V supply and powered the unit 
up.  I
would have removed all output connections on the supplies and 
tested them

seperately.  Are you sure about that transformer short? Remember that
primaries on decent size line transformers only have something ike
2 to 4  ohms resistance at most.  I wondered why yours was 12 lbs 
heavier

than mine.  Linear supplies - that would do it!

The expanded/exploded capacitors could be just from age, or they 
could be

from an output fault on the power supply that caused the voltage to go
high.  That's why I would have tested both power supplies offline.

You said it's alive, but you haven't mentioned if it actually works.

By the way, it turns out that I paid dearly for my good luck with the
repair of my 2077.  In the two weeks following that, I got a 
pinched nerve
in my back that's still giving me trouble, I broke a big chunk off 
a tooth

and am now scheduled for a crown at a cost of about $1000, and my
big-screen TV died! :(

Ed




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and follow the instructions there.

Re: [time-nuts] Wavecrest DTS 2070

Is 200 amperes @ 2v not lethal?

-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf 
Of Pete Lancashire
Sent: Tuesday, 10 September 2013 6:58 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Wavecrest DTS 2070

-2V is a common terminator voltage for ECL

In my days before gray hair I worked on a machine that for each rack had a 200A 
-2V power supply, a fully configured system had over 20 racks.

On Mon, Sep 9, 2013 at 1:19 PM, paul swed paulsw...@gmail.com wrote:

 Just trying to figure out why a 2V power supply pretty curious.
 Regards
 Paul.

 On Mon, Sep 9, 2013 at 3:57 PM, Ed Palmer ed_pal...@sasktel.net wrote:

  I think there's lots of ECL in this thing.  In 2012, Richard H 
  McCorkle said that US Patent #6226231 was for part of the DTS-2075.  
  It shows lots of ECL.  My unit dates from around 2000 and doesn't 
  have an obvious 3V3 supply, only 5V, 15V, and 24V.  One of the 5V 
  supplies might be adjusted for 5V2 and wired for negative voltage.  I 
  didn't check that.

  Ed

  On 9/9/2013 1:16 PM, paul swed wrote:

  2.1 volt hmm maybe they are doing something with ECL. Say the 
  common
 logic
  was 3.3 V adding a -2.1 would get you close to the 5.2V of ECL. 
  Though these look new enough that ECL should not be in the mix.
  Regards
  Paul
  WB8TSL

  On Mon, Sep 9, 2013 at 2:54 PM, Ed Palmer ed_pal...@sasktel.net
 wrote:

   Hi Marki,

  On 9/9/2013 12:15 PM, Mark C. Stephens wrote:

   Amazing Ed, I just had a invasive discography last Thursday!
  I have been a bit quiet because of a back injury too.

   You're creeping me out Marki!

We must be living parallel lives, fortunately my telly is still 
  good, my

  9 year old son has discovered Dr. Who so we are having great time 
  watching it :) Some of the original series are a hoot :) so 
  overdone but the Dalek's back then couldn't fly...

   I remember watching it when it was new in the early '60's.  Scary.

Only 1000 for a crown, It would be cheaper for me to fly to 
  Canada to get

  crown
  My last crown was disaster as a result the clown that put the 
  crown in stuffed up and the crown snapped off at the root So 
  added to the $2400 for the crown, I am now up for around 7K for 
  an implant.

   Geez, I hope I don't follow in your footsteps!  Your 'parallel lives'
  comment now has me really worried.

The standby PSU tranny is dead short, zero ohm as compared to 
  the
 2v/6A

  supplies 8-10 ohm.
  Any idea what that 2V supply is for?,

   Sorry, no clue.  But my mainboard has a +2.1 volt test point so
 there's
  certainly a 'family resemblance' between our units.  Mine must 
  generate the
  +2.1 volts on the mainboard.

If I can lose the 2 linear PSU, I'll lose a ton of weight, but
 possibly

  at the expense of electrical noise.
  I was thinking that is why they used optics between the control 
  board
 -
  to keep spurious noise to a minimum.

   Yes, but I would have thought that optoisolators would have been
  cheaper
  than optical transmitters, receivers, and cables.

Yeah, I did play roulette by powering it up like that but I was 
  a tad

  annoyed as I was told it was a working unit.
  The bottom board on this one has millions of tiny surface mount 
  caps mounted on there sides.
  It looks terribly fragile. Much of a job to get it out?

   Well, I described my process in the teardown.  Is your board similar?
Other than the front panel stuff, board removal is just a matter 
  of unplugging connectors and unscrewing the mounting screws.

All the PSU screw heads are under it (of course) Yup.  I needed 
  to get at the mounting screws for the cardcage so that I could 
  inspect the motherboard.

  Ed

-Original Message-

  From: time-nuts-boun...@febo.com [mailto:time-nuts-bounces@**fe**
 bo.comhttp://febo.com
  time-nuts-bounces@febo.**com time-nuts-boun...@febo.com]

  On Behalf Of Ed Palmer
  Sent: Tuesday, 10 September 2013 1:53 AM
  To: Discussion of precise time and frequency measurement
  Subject: Re: [time-nuts] Wavecrest DTS 2070

  Sorry, the oracle is out of the office today - I'm the janitor.  
  :)

  I see you've already replaced the 24V supply and powered the unit up.
  I
  would have removed all output connections on the supplies and 
  tested them seperately.  Are you sure about that transformer 
  short?  Remember that primaries on decent size line transformers 
  only have something ike
  2 to 4  ohms resistance at most.  I wondered why yours was 12 lbs 
  heavier than mine.  Linear supplies - that would do it!

  The expanded/exploded capacitors could be just from age, or they 
  could be from an output fault on the power supply that caused the 
  voltage to go high.  That's why I would have tested both power 
  supplies offline.

  You said it's alive, but you haven't mentioned if it actually works.

  By the way

Re: [time-nuts] Wavecrest DTS 2070

2013-09-09 Thread Jim Lux


On 9/9/13 2:21 PM, Mark C. Stephens wrote:

Is 200 amperes @ 2v not lethal?


Not particularly.. any more than putting your fingers across a 1.5 or 3V 
battery is lethal.



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Re: [time-nuts] Wavecrest DTS 2070

Ah so the sparks scare you to death, well I can relate to that :)
I fear we deviate off course Bob..

-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf 
Of Bob Stewart
Sent: Tuesday, 10 September 2013 7:39 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Wavecrest DTS 2070

Only if whatever shorts it vaporizes violently enough to kill you.  When I 
worked at Burroughs in the 70s, I heard stories about low volts/high amps 
hijinks.

Bob

 From: Mark C. Stephens ma...@non-stop.com.au
To: Discussion of precise time and frequency measurement 
time-nuts@febo.com
Sent: Monday, September 9, 2013 4:21 PM
Subject: Re: [time-nuts] Wavecrest DTS 2070

Is 200 amperes @ 2v not lethal?

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Re: [time-nuts] Wavecrest DTS 2070

I have seen a 12v car battery and a wire frame bed to torture victims on 
television twice now.
Are you telling me that's bunk?! (pardon the pun)



-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf 
Of Jim Lux
Sent: Tuesday, 10 September 2013 7:24 AM
To: time-nuts@febo.com
Subject: Re: [time-nuts] Wavecrest DTS 2070

On 9/9/13 2:21 PM, Mark C. Stephens wrote:
 Is 200 amperes @ 2v not lethal?

Not particularly.. any more than putting your fingers across a 1.5 or 3V 
battery is lethal.


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Re: [time-nuts] Wavecrest DTS 2070

2013-09-09 Thread Pete Lancashire

Lethal was dropping a conductor across the buss bars. If it was not the -2V
it
was -5.2V. I can't remember but it was at least 75A more like 100A.

The power supplies were in the bottom of the cabinets and tin plated copper
buss bars would run up the side of the back planes.

The back planes where wire wrapped and we were suppose to shut the power off
when making a change.  A bit of 30 gauge wire didn't matter but a manual
wire wrap
tool made some pretty interesting sparks. That caused a fault.

Another had metal framed glasses. Did not even cause a hiccup to the test
program
that was running.

Ah the good days of CML, Current Mode Logic. at Burroughs.

-pete


On Mon, Sep 9, 2013 at 2:21 PM, Mark C. Stephens ma...@non-stop.com.auwrote:

 Is 200 amperes @ 2v not lethal?

 -Original Message-
 From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
 Behalf Of Pete Lancashire
 Sent: Tuesday, 10 September 2013 6:58 AM
 To: Discussion of precise time and frequency measurement
 Subject: Re: [time-nuts] Wavecrest DTS 2070

 -2V is a common terminator voltage for ECL

 In my days before gray hair I worked on a machine that for each rack had a
 200A -2V power supply, a fully configured system had over 20 racks.




 On Mon, Sep 9, 2013 at 1:19 PM, paul swed paulsw...@gmail.com wrote:

  Just trying to figure out why a 2V power supply pretty curious.
  Regards
  Paul.
 
 
  On Mon, Sep 9, 2013 at 3:57 PM, Ed Palmer ed_pal...@sasktel.net wrote:
 
   I think there's lots of ECL in this thing.  In 2012, Richard H
   McCorkle said that US Patent #6226231 was for part of the DTS-2075.
   It shows lots of ECL.  My unit dates from around 2000 and doesn't
   have an obvious 3V3 supply, only 5V, 15V, and 24V.  One of the 5V
   supplies might be adjusted for 5V2 and wired for negative voltage.  I
 didn't check that.
  
   Ed
  
  
   On 9/9/2013 1:16 PM, paul swed wrote:
  
   2.1 volt hmm maybe they are doing something with ECL. Say the
   common
  logic
   was 3.3 V adding a -2.1 would get you close to the 5.2V of ECL.
   Though these look new enough that ECL should not be in the mix.
   Regards
   Paul
   WB8TSL
  
  
   On Mon, Sep 9, 2013 at 2:54 PM, Ed Palmer ed_pal...@sasktel.net
  wrote:
  
Hi Marki,
  
  
   On 9/9/2013 12:15 PM, Mark C. Stephens wrote:
  
Amazing Ed, I just had a invasive discography last Thursday!
   I have been a bit quiet because of a back injury too.
  
You're creeping me out Marki!
  
  
 We must be living parallel lives, fortunately my telly is still
   good, my
  
   9 year old son has discovered Dr. Who so we are having great time
   watching it :) Some of the original series are a hoot :) so
   overdone but the Dalek's back then couldn't fly...
  
I remember watching it when it was new in the early '60's.  Scary.
  
  
 Only 1000 for a crown, It would be cheaper for me to fly to
   Canada to get
  
   crown
   My last crown was disaster as a result the clown that put the
   crown in stuffed up and the crown snapped off at the root So
   added to the $2400 for the crown, I am now up for around 7K for
   an implant.
  
Geez, I hope I don't follow in your footsteps!  Your 'parallel
 lives'
   comment now has me really worried.
  
  
 The standby PSU tranny is dead short, zero ohm as compared to
   the
  2v/6A
  
   supplies 8-10 ohm.
   Any idea what that 2V supply is for?,
  
Sorry, no clue.  But my mainboard has a +2.1 volt test point so
  there's
   certainly a 'family resemblance' between our units.  Mine must
   generate the
   +2.1 volts on the mainboard.
  
  
 If I can lose the 2 linear PSU, I'll lose a ton of weight, but
  possibly
  
   at the expense of electrical noise.
   I was thinking that is why they used optics between the control
   board
  -
   to keep spurious noise to a minimum.
  
Yes, but I would have thought that optoisolators would have been
   cheaper
   than optical transmitters, receivers, and cables.
  
  
 Yeah, I did play roulette by powering it up like that but I was
   a tad
  
   annoyed as I was told it was a working unit.
   The bottom board on this one has millions of tiny surface mount
   caps mounted on there sides.
   It looks terribly fragile. Much of a job to get it out?
  
Well, I described my process in the teardown.  Is your board
 similar?
 Other than the front panel stuff, board removal is just a matter
   of unplugging connectors and unscrewing the mounting screws.
  
  
 All the PSU screw heads are under it (of course) Yup.  I needed
   to get at the mounting screws for the cardcage so that I could
   inspect the motherboard.
  
   Ed
  
  
 -Original Message-
  
   From: time-nuts-boun...@febo.com [mailto:time-nuts-bounces@**fe**
  bo.comhttp://febo.com
   time-nuts-bounces@febo.**com time-nuts-boun...@febo.com]
  
   On Behalf Of Ed Palmer
   Sent: Tuesday, 10 September 2013 1:53 AM
   To: Discussion of precise time and frequency measurement

Re: [time-nuts] Wavecrest DTS 2070

2013-09-09 Thread Bob Stewart

Only if whatever shorts it vaporizes violently enough to kill you.  When I 
worked at Burroughs in the 70s, I heard stories about low volts/high amps 
hijinks.

Bob





 From: Mark C. Stephens ma...@non-stop.com.au
To: Discussion of precise time and frequency measurement time-nuts@febo.com 
Sent: Monday, September 9, 2013 4:21 PM
Subject: Re: [time-nuts] Wavecrest DTS 2070
 

Is 200 amperes @ 2v not lethal?


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Re: [time-nuts] Wavecrest DTS 2070

2013-09-09 Thread Jim Lux


On 9/9/13 2:38 PM, Mark C. Stephens wrote:

I have seen a 12v car battery and a wire frame bed to torture victims on 
television twice now.
Are you telling me that's bunk?! (pardon the pun)


As someone who used to make their living doing just such physical 
effects for film and TV..


It's a special made for TV battery(!)  (typically with a connection to 
something else inside, so you can make really nice scary sparks)


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Re: [time-nuts] Wavecrest DTS 2070

You have some cml in the basement right?
Regards
Paul


On Mon, Sep 9, 2013 at 5:51 PM, Pete Lancashire p...@petelancashire.comwrote:

 Lethal was dropping a conductor across the buss bars. If it was not the -2V
 it
 was -5.2V. I can't remember but it was at least 75A more like 100A.

 The power supplies were in the bottom of the cabinets and tin plated copper
 buss bars would run up the side of the back planes.

 The back planes where wire wrapped and we were suppose to shut the power
 off
 when making a change.  A bit of 30 gauge wire didn't matter but a manual
 wire wrap
 tool made some pretty interesting sparks. That caused a fault.

 Another had metal framed glasses. Did not even cause a hiccup to the test
 program
 that was running.

 Ah the good days of CML, Current Mode Logic. at Burroughs.

 -pete


 On Mon, Sep 9, 2013 at 2:21 PM, Mark C. Stephens ma...@non-stop.com.au
 wrote:

  Is 200 amperes @ 2v not lethal?
 
  -Original Message-
  From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
  Behalf Of Pete Lancashire
  Sent: Tuesday, 10 September 2013 6:58 AM
  To: Discussion of precise time and frequency measurement
  Subject: Re: [time-nuts] Wavecrest DTS 2070
 
  -2V is a common terminator voltage for ECL
 
  In my days before gray hair I worked on a machine that for each rack had
 a
  200A -2V power supply, a fully configured system had over 20 racks.
 
 
 
 
  On Mon, Sep 9, 2013 at 1:19 PM, paul swed paulsw...@gmail.com wrote:
 
   Just trying to figure out why a 2V power supply pretty curious.
   Regards
   Paul.
  
  
   On Mon, Sep 9, 2013 at 3:57 PM, Ed Palmer ed_pal...@sasktel.net
 wrote:
  
I think there's lots of ECL in this thing.  In 2012, Richard H
McCorkle said that US Patent #6226231 was for part of the DTS-2075.
It shows lots of ECL.  My unit dates from around 2000 and doesn't
have an obvious 3V3 supply, only 5V, 15V, and 24V.  One of the 5V
supplies might be adjusted for 5V2 and wired for negative voltage.  I
  didn't check that.
   
Ed
   
   
On 9/9/2013 1:16 PM, paul swed wrote:
   
2.1 volt hmm maybe they are doing something with ECL. Say the
common
   logic
was 3.3 V adding a -2.1 would get you close to the 5.2V of ECL.
Though these look new enough that ECL should not be in the mix.
Regards
Paul
WB8TSL
   
   
On Mon, Sep 9, 2013 at 2:54 PM, Ed Palmer ed_pal...@sasktel.net
   wrote:
   
 Hi Marki,
   
   
On 9/9/2013 12:15 PM, Mark C. Stephens wrote:
   
 Amazing Ed, I just had a invasive discography last Thursday!
I have been a bit quiet because of a back injury too.
   
 You're creeping me out Marki!
   
   
  We must be living parallel lives, fortunately my telly is still
good, my
   
9 year old son has discovered Dr. Who so we are having great time
watching it :) Some of the original series are a hoot :) so
overdone but the Dalek's back then couldn't fly...
   
 I remember watching it when it was new in the early '60's.
  Scary.
   
   
  Only 1000 for a crown, It would be cheaper for me to fly to
Canada to get
   
crown
My last crown was disaster as a result the clown that put the
crown in stuffed up and the crown snapped off at the root So
added to the $2400 for the crown, I am now up for around 7K for
an implant.
   
 Geez, I hope I don't follow in your footsteps!  Your 'parallel
  lives'
comment now has me really worried.
   
   
  The standby PSU tranny is dead short, zero ohm as compared to
the
   2v/6A
   
supplies 8-10 ohm.
Any idea what that 2V supply is for?,
   
 Sorry, no clue.  But my mainboard has a +2.1 volt test point so
   there's
certainly a 'family resemblance' between our units.  Mine must
generate the
+2.1 volts on the mainboard.
   
   
  If I can lose the 2 linear PSU, I'll lose a ton of weight, but
   possibly
   
at the expense of electrical noise.
I was thinking that is why they used optics between the control
board
   -
to keep spurious noise to a minimum.
   
 Yes, but I would have thought that optoisolators would have been
cheaper
than optical transmitters, receivers, and cables.
   
   
  Yeah, I did play roulette by powering it up like that but I was
a tad
   
annoyed as I was told it was a working unit.
The bottom board on this one has millions of tiny surface mount
caps mounted on there sides.
It looks terribly fragile. Much of a job to get it out?
   
 Well, I described my process in the teardown.  Is your board
  similar?
  Other than the front panel stuff, board removal is just a matter
of unplugging connectors and unscrewing the mounting screws.
   
   
  All the PSU screw heads are under it (of course) Yup.  I needed
to get at the mounting screws for the cardcage so that I could
inspect the motherboard.
   
Ed
   
   
  -Original Message

Re: [time-nuts] Wavecrest DTS 2070