[time-nuts] Wavecrest DTS 2070

[Mark C. Stephens]

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-bounces at febo.com [mailto:time-nuts-bounces at 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-bounces at febo.com [mailto:time-nuts-bounces at 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 <bob at evoria.net>
>> To: Discussion of precise time and frequency measurement 
>> <time-nuts at 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 <marks at non-stop.com.au>
>>> To: "time-nuts at febo.com" <time-nuts at 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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