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    uTracer 'tube tester'

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    uTracer 'tube tester'

    Post by Guest on Sun Jun 22, 2014 6:08 pm

    has anyone on this forum heard of the uTester, http://www.dos4ever.com/uTracer3/uTracer3.html, or, has one.
    Looks like an interesting tool!

    sKiZo

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    Location : Michigan USA

    Re: uTracer 'tube tester'

    Post by sKiZo on Sun Jun 22, 2014 6:30 pm

    Link works better without the comma at the end ...

    http://www.dos4ever.com/uTracer3/uTracer3.html

    Looks interesting ... have to do me some reading.

    * I already like the idea of being able to test a tube at a specific bias point ...

    peterh

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    Join date : 2012-12-25
    Location : gothenburg, sweden

    Re: uTracer 'tube tester'

    Post by peterh on Mon Jun 23, 2014 2:11 am

    MontanaWay wrote:has anyone on this forum heard of the uTester, http://www.dos4ever.com/uTracer3/uTracer3.html, or, has one.
    Looks like an interesting tool!

    Yes, i have built one.

    it's a very good design, more or less self-calibrating, and accurate.

    Due to it's limitation of voltage it's less useful for power tubes( it has an upper limit of 300V )

    My implementation is a little different ( and of course vastly superior !) , as i have the
    uTracer in a small box by itself, each type of tubesocket has it's own "adapter box" size of
    a cigarette packet. Each adapter has a 25-pole D-sub connector where 1-n is hardwired to
    the tubesocket 1-n , and 25 23 21 19 13 14 is connected to A G2 G C f + f of the uTracer.
    The final customization for each tube is a D-sub connector with appropriate cross-connections
    that is plugged into the adapters D-sub. This gives me total flexibility and shortest possible cables
    ( yes cable length is a problem with all active devices) at a cost of a number of d-sub plugs.

    I think there is a picture on dos4ever.com , if interested i could publish some more pictures.

    Maintarget

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    Join date : 2013-02-10

    Re: uTracer 'tube tester'

    Post by Maintarget on Mon Jun 23, 2014 8:56 pm

    Peterh would like to see your pictures this is way over my head but very interesting none the less

    peterh

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    Re: uTracer 'tube tester'

    Post by peterh on Tue Jun 24, 2014 5:51 am

    Maintarget wrote:Peterh would like to see your pictures this is way over my head but very interesting none the less

    Have a look at http://n.manet.nu/uTracer


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    Re: uTracer 'tube tester'

    Post by Guest on Tue Jun 24, 2014 6:26 pm

    peterh wrote:
    Maintarget wrote:Peterh would like to see your pictures this is way over my head but very interesting none the less

    Have a look at http://n.manet.nu/uTracer


    can you show how you wired up your tube specific D-Sub plugs, thanks!

    peterh

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    Re: uTracer 'tube tester'

    Post by peterh on Wed Jun 25, 2014 2:20 am

    Wiring for the tubespecific D-SUB:
    This example is for 6AN8, and needs two plugs, one for the triode part and one for the pentode.

    Common is the wiring to the D-sub chassies connector :
    Pin connects to
    1 tubesocket 1
    2 tubesocket 2
    3 tubesocket 3
    4 tubesocket 4
    ----
    12 chassies ground uTracer
    14 filament uTracer
    15 filament uTracer
    19 grid uTracer
    21 cathode uTracer
    23 screen uTracer
    25 anode uTracer

    The adapter plugs will the interconnect these, all but one is a wire, the one connecting the grid
    is a 1kohm resistor to prevent parasitic oscillation ( there is so small amounts of current that
    this will not affect measuring.

    6an8 triode has

    25 -- 1 ( anod )
    23 -- 3 (cathode )
    19 -- 2 ( grid 1kOhm resistor )
    14 -- 4 ( filament )
    15 -- 5 ( filament )
    12 -- 9

    6an8 pentode has
    25 -- 6 (anode)
    23 -- 7 /screen)
    21 -- 9 cathode
    19 -- 8 grid ( 1kohm)
    14 -- 4
    15 -- 5


    peterh

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    Re: uTracer 'tube tester'

    Post by peterh on Thu Jun 26, 2014 2:48 am

    It's very quiet here.... Any comments ?

    GP49

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    Re: uTracer 'tube tester'

    Post by GP49 on Thu Jun 26, 2014 10:44 am

    It's summertime, maybe folks are out doing fun things in the outdoors, instead of hi-fi?

    Not me, though; it's been doctor visits to sort out a particular and potentially serious issue that has cropped up; a tricky issue that has knocked out the turn signals in one of our cars; and then a cat who developed asthma and almost couldn't breathe (happily home now).

    But at least my hi-fi is there and running when I want some music.

    Bob Latino
    Admin

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    Re: uTracer 'tube tester'

    Post by Bob Latino on Thu Jun 26, 2014 11:33 am

    peterh wrote:It's very quiet here.... Any comments ?

    Hi Peter,

    As GP49 has mentioned above ..

    It always slows down here in the summer time with the warmer weather .. People don't listen to their stereo gear as much. They spend more time vacationing (boating, camping, the beach etc.). DIY type forums, as this one is, has more participation in the winter months (at least in the northern hemisphere) when DIY people are looking for an indoor project when colder weather and snow keeps them inside for much of their recreational time.

    Bob

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    Re: uTracer 'tube tester'

    Post by Guest on Thu Jun 26, 2014 7:40 pm

    the more I read about it the more I am leaning towards getting one.
    This tester really seems to be able to obtain pretty much all the vital readings and measurements for a given tube.
    One can get very involved in setting this up and testing tubes, I don't think I would use all the possible readings this tester can do.
    Pretty much replaces any old style tube tester, not to mention being able to obtain a ton more info on a tube and far more accurate!
    It does seem to be somewhat limited for power tubes, a somewhat low B+, but I don't think that will really be an issue for me.
    I like peterh's approach, but I think I will go with simple banana plugs & sockets, arranged in such a way that I can create 'cheat' cards which I can overlay on the banana plug sockets which will then tell me how to set up the 'patch' for a given tube/s.
    I'll keep reading, but like I said, I think I'll order a kit!

    Pillo69

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    Re: uTracer 'tube tester'

    Post by Pillo69 on Mon Jul 25, 2016 9:12 pm

    I requested a kit to Ronald.
    The new version of 400v.

    My idea is to include different sockets in the cabinet.

    http://www.dos4ever.com/uTracer3/uTracer3_pag0.html

    deepee99

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    Re: uTracer 'tube tester'

    Post by deepee99 on Tue Jul 26, 2016 1:05 pm

    Bob Latino wrote:
    peterh wrote:It's very quiet here.... Any comments ?

    Hi Peter,

    As GP49 has mentioned above ..

    It always slows down here in the summer time with the warmer weather .. People don't listen to their stereo gear as much. They spend more time vacationing (boating, camping, the beach etc.). DIY type forums, as this one is, has more participation in the winter months (at least in the northern hemisphere) when DIY people are looking for an indoor project when colder weather and snow keeps them inside for much of their recreational time.

    Bob
    Quite so, and it leaves more space for Kentley and me to duke it out. However, we're still shovelling snow here in 90F heat.

    Kentley

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    Location : Worcester, MA

    Re: uTracer 'tube tester'

    Post by Kentley on Tue Jul 26, 2016 1:55 pm

    deepee99 wrote:
    Bob Latino wrote:
    peterh wrote:It's very quiet here.... Any comments ?

    Hi Peter,

    As GP49 has mentioned above ..

    It always slows down here in the summer time with the warmer weather .. People don't listen to their stereo gear as much. They spend more time vacationing (boating, camping, the beach etc.). DIY type forums, as this one is, has more participation in the winter months (at least in the northern hemisphere) when DIY people are looking for an indoor project when colder weather and snow keeps them inside for much of their recreational time.

    Bob
    Quite so, and it leaves more space for Kentley and me to duke it out. However, we're still shovelling snow here in 90F heat.
    What a flooze. Snow my hinterlands.

    deepee99

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    Location : Wallace, Idaho

    Re: uTracer 'tube tester'

    Post by deepee99 on Tue Jul 26, 2016 2:10 pm

    Kentley wrote:
    deepee99 wrote:
    Bob Latino wrote:
    peterh wrote:It's very quiet here.... Any comments ?

    Hi Peter,

    As GP49 has mentioned above ..

    It always slows down here in the summer time with the warmer weather .. People don't listen to their stereo gear as much. They spend more time vacationing (boating, camping, the beach etc.). DIY type forums, as this one is, has more participation in the winter months (at least in the northern hemisphere) when DIY people are looking for an indoor project when colder weather and snow keeps them inside for much of their recreational time.

    Bob
    Quite so, and it leaves more space for Kentley and me to duke it out. However, we're still shovelling snow here in 90F heat.
    What a flooze. Snow my hinterlands.
    Kentley, The Dual is on and I have a full jug of Thorens to combat any heartburn. AR you ready to continue upon this ARC? If not I shall unleash more ants on your snow-free domicile.

    BNR_1

    Posts : 78
    Join date : 2013-06-11

    Re: uTracer 'tube tester'

    Post by BNR_1 on Tue Jul 26, 2016 3:23 pm

    Pillo69 wrote:I requested a kit to Ronald.
    The new version of 400v.

    My idea is to include different sockets in the cabinet.

    http://www.dos4ever.com/uTracer3/uTracer3_pag0.html

    Hey Pillo69 - keeps us informed as to what your thoughts are with regards to the unit. I highly doubt I would build such a unit, but who knows. It does look interesting.

    Thanks

    Pillo69

    Posts : 105
    Join date : 2012-04-11
    Location : Granada (España)

    Re: uTracer 'tube tester'

    Post by Pillo69 on Tue Jul 26, 2016 7:57 pm

    I received the kit.
    I'm going to start.........


    peterh

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    Join date : 2012-12-25
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    Re: uTracer 'tube tester'

    Post by peterh on Wed Jul 27, 2016 2:50 am

    BNR_1 wrote:
    Pillo69 wrote:I requested a kit to Ronald.
    The new version of 400v.

    My idea is to include different sockets in the cabinet.

    http://www.dos4ever.com/uTracer3/uTracer3_pag0.html

    Hey Pillo69 - keeps us informed as to what your thoughts are with regards to the unit.  I highly doubt I would build such a unit, but who knows.  It does look interesting.

    Thanks

    The kit is very well documented. The build is done in a step by step with tests between
    the stages so when the kit is done you have tested every step.

    To avoid "long cable effects" i would recommend that the first tube is measured
    in a single holder connected with short wires straight to the uTracer. Keep this tube
    and holder to compare when the final installation is done.

    Why do i say this ? well, many cables and some capacitance might push the valve into
    oscillation that will corrupt the curves. Mounting proper grid stoppers and ferrite pearls can be used to correct this.

    Pillo69

    Posts : 105
    Join date : 2012-04-11
    Location : Granada (España)

    Re: uTracer 'tube tester'

    Post by Pillo69 on Wed Jul 27, 2016 5:30 am

    Peterh thanks for your tips.

    Pillo69

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    Join date : 2012-04-11
    Location : Granada (España)

    Re: uTracer 'tube tester'

    Post by Pillo69 on Fri Jul 29, 2016 10:00 am

    The mounting kit is finished.
    Tested and calibrated.
    I will perform tests with a noval socket, while mechanized furniture.


    peterh

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    Join date : 2012-12-25
    Location : gothenburg, sweden

    Re: uTracer 'tube tester'

    Post by peterh on Fri Jul 29, 2016 10:48 am

    Well Done !
    Are you using the windows tools ? What windows do you use ?

    Tube Nube

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    Re: uTracer 'tube tester'

    Post by Tube Nube on Fri Jul 29, 2016 12:28 pm

    There's something mildly amusing about a tube tester that uses silicon chips.

    peterh

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    Join date : 2012-12-25
    Location : gothenburg, sweden

    Re: uTracer 'tube tester'

    Post by peterh on Fri Jul 29, 2016 3:18 pm

    Tube Nube wrote:There's something mildly amusing about a tube tester that uses silicon chips.

    It's not a tube tester. It's a tube tracer, a device that measures every
    point on a number of load conditions.

    As a by-product simple values ( Gm, Ra and My ) is obtained at any
    choosen working point.

    A tube "tester" is either to simple to be of any value, or to simple to be of any general value.

    Tectronix made tube tracers too a long time ago. But these used lots of tubes
    and they are no longer made. If there were made they would be very expensive.

    That's what todays computers can give, large functionality to a very low price.

    In addition uTracer measures one microsecond at each measurment, thus avoiding to heat up tube structures, which will give more accurate values when measuring the higher power parts.


    Pillo69

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    Location : Granada (España)

    Re: uTracer 'tube tester'

    Post by Pillo69 on Sat Jul 30, 2016 7:40 pm

    I am using the Win 10 computer, the RS232 adapter does not have the chipsset TFDI (I found the house).

    Until I make a cabinet baseboards, I have placed a turret with noval zocalo.



    I am learning to use the GUI interface.
    I have done some tests with JJ 12AX7.
    Here are the reports in txt and bmp.






    BNR_1

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    Re: uTracer 'tube tester'

    Post by BNR_1 on Sat Jul 30, 2016 8:57 pm

    Awesome. What are you using for the filament source?

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