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 Post subject: Scope clock build
PostPosted: Mar Mon 26, 2018 11:48 am 
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Location: Warner Robins, GA
I'm thinking of building another scope clock which will more than likely be for use at work.

I've often wanted to do that, but never thought I could until I thought about using something like a vintage huntron tracker or similar.

I'm going to use this kit.

http://www.dutchtronix.com/ScopeClockH3-1-Enhanced.htm

What other than a huntron tracker will be compact and have a smaller electrostatically deflected CRT?

Also will the huntron require any sort of deflection amplifiers?


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 Post subject: Re: Scope clock build
PostPosted: Mar Mon 26, 2018 2:06 pm 
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that would be a cool kit if the display didn't have the "Dutchtron" logo

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 Post subject: Re: Scope clock build
PostPosted: Mar Mon 26, 2018 2:44 pm 
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glue_ru wrote:
that would be a cool kit if the display didn't have the "Dutchtron" logo


That can be removed in the settings or it can be set to whatever text you want.


I have one of those in an EICO solid state kit scope and it is quite good.


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 Post subject: Re: Scope clock build
PostPosted: Mar Mon 26, 2018 5:03 pm 
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sweet, I like it much better now. Cajn display my own name.
I'm just not a fan of countries like the Dutch who just a short while ago thought
the earth was flat.
And I work on Dutch equipment, life would be much better without it.

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 Post subject: Re: Scope clock build
PostPosted: Mar Mon 26, 2018 5:13 pm 
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Only thing I don't like is that when displayed on a round CRT the round clock face has to be expanded somewhat using the volt/div controls to fill the whole CRT and then the vertical and horizontal volts/div have to be reduced when displaying the menus or terminal.

Otherwise it is a great kit.

Accuracy can be improved by getting a 32.768MHz OCXO which replaces the XTAL of the RTC or it can accept a 1 PPS signal from an external source or a GPS device with serial port can be pluggesd into it.

OR

just keep the box the clock is in at a temperature of 98.6F 24/7


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 Post subject: Re: Scope clock build
PostPosted: Apr Mon 16, 2018 3:30 am 
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Given I found a CRT driver board that will work with 2-3 inch electrostatically deflected CRTs I can find a proper CRT and make my own display for the clock.

The issues are these.

1. Cost of CRT
2. Needs to be as short of a CRT as possible.


I did test how the clock would look on a 2-3 inch screen by turning down the vertical and horizontal gain controls of my scope clock with 5" CRT and the display looks ok, although the larger 5" display of course looks better.

I do have an OS-8C oscope that I restored which is quite small. If I had to I could use it, but would prefer not to do that as it would require removing all the existing circuitry aside from the power transformer and I'd rather not mod that one if possible.

But if nothing comes up or if the scope is so common that they are readily available for cheap I might get one unrestored and mod it, although the angle of the CRT might not be very good for viewing from a distance as I don't always sit at my desk at work.

That said a 3" display is possibly as small as I should go for the same reason, but I don't like he length of the typical 3" tube as it is really too long except in the OS-8 because of its mounting angle in that scope.


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 Post subject: Re: Scope clock build
PostPosted: Apr Mon 16, 2018 6:38 am 
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Quote:
I'm just not a fan of countries like the Dutch who just a short while ago thought
the earth was flat.


::::gasp!!::: you mean the earth isn't flat???

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 Post subject: Re: Scope clock build
PostPosted: Apr Mon 16, 2018 3:24 pm 
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funny, I just show a survey of the Millennial's, only 70% believe the earth is round.
where did we go wrong with these kids?

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 Post subject: Re: Scope clock build
PostPosted: Apr Mon 16, 2018 6:05 pm 
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Location: Warner Robins, GA
Don't know where the world went wrong.


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