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 Fred Lever's 3in TV set.
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 Return to top of page · Post #: 1 · Written at 4:36:37 PM on 23 June 2017.
Fred Lever's Gravatar
 Location: Toongabbie, NSW
 Member since 19 November 2015
 Member #: 1828
 Postcount: 570

Hullo all, while I'm restricted to quarters due to my dicky ticker and not allowed to belt things in the workshop with a hammer or soldering iron I put my mind to making a cute little 3" TV set with all the junk box parts lying around.
I have drafted a circuit and put this in a document as part 1, the design of the set.
I have a couple of unknown 3" CRT's so my next step after the concept drawings in part 1 will be to test these so as to light them up.
I'll figure out the pin outs and applying voltages and see what I get!
Some members may have a comment on the design and that is welcome.

Interesting find in my library, a " Television Field Service Manual" being a large size green bolt together manual covering sets from Admiral to Zenith and containing circuits and information on dozens and dozens of TV sets. The print date is 1971 from JR Publications Peakhurst so most sets are valve. This will give me plenty of typical circuits to look at.

I note that there is a circuit of a "Southern Cross Radio Television Pty Ltd" set near the back. I'll bet that was dad and lad operation with just two models listed. There has to be story there.

I'll email in a PDF with the 3" Part one for Brad to clip to this thread.

Cheers, Fred Lever.

3 inch TV - The Design


 
 Return to top of page · Post #: 2 · Written at 3:27:49 PM on 27 June 2017.
Vintage Pete's avatar
 Location: Cromer, NSW
 Member since 1 May 2016
 Member #: 1919
 Postcount: 1050

Hello Fred,
I always enjoy reading you're posts. I like the way you rake around in boxes looking for junk to build with, for some reason I thought you lived in Victoria,but I see your'er a Sydneyite like me .I go too that old drive in market over your way and I get lots of good old junk there.cheap old tools to sometimes
Pete


 
 Return to top of page · Post #: 3 · Written at 6:43:32 AM on 30 June 2017.
Fred Lever's Gravatar
 Location: Toongabbie, NSW
 Member since 19 November 2015
 Member #: 1828
 Postcount: 570

Guys, when I open the linked article here or any of my previous articles the imbedded photos now show as black rectangles not coloured pictures!
Let me know if the same happens to you please.
Fred.


 
 Return to top of page · Post #: 4 · Written at 8:17:47 AM on 30 June 2017.
STC830's Gravatar
 Location: NSW
 Member since 10 June 2010
 Member #: 681
 Postcount: 804

Link OK here.


 
 Return to top of page · Post #: 5 · Written at 7:53:12 PM on 30 June 2017.
Fred Lever's Gravatar
 Location: Toongabbie, NSW
 Member since 19 November 2015
 Member #: 1828
 Postcount: 570

OK this is the second part of the story where I test my oddball CRT's and select a 3 inch unit as the one to use.

I'll email an Adobe PDF for Brad to pin to this post.

Cheers, Fred.

3 inch TV - CRT Test


 
 Return to top of page · Post #: 6 · Written at 11:48:14 PM on 30 June 2017.
Robbbert's avatar
 Location: Sydney, NSW
 Member since 18 September 2015
 Member #: 1801
 Postcount: 1074

PDF looks fine.


 
 Return to top of page · Post #: 7 · Written at 3:28:04 AM on 1 July 2017.
GTC's avatar
 GTC
 Location: Sydney, NSW
 Member since 28 January 2011
 Member #: 823
 Postcount: 5262

I'm seeing fine white horizontal lines in figs 4, 5, 6, 8 and 9.

Other than that, all okay.


 
 Return to top of page · Post #: 8 · Written at 7:58:44 AM on 1 July 2017.
Fred Lever's Gravatar
 Location: Toongabbie, NSW
 Member since 19 November 2015
 Member #: 1828
 Postcount: 570

Hullo all, I swapped my browser to google chrome and the pictures show ok.

Sorry for all the head scratching but as I said to Brad i'm 73 and don't have a clue!!

I was just using whatever browser the PC's come with probably IE or whatever crap MS include with W10.

If this is not a cure its a work around so i'll just use google chrome and enjoy the pictures instead of big fat black squares!

Cheers, Fred.


 
 Return to top of page · Post #: 9 · Written at 4:29:24 PM on 12 July 2017.
Fred Lever's Gravatar
 Location: Toongabbie, NSW
 Member since 19 November 2015
 Member #: 1828
 Postcount: 570

Hullo all, here is the next part of this project, part three, describing getting all the parts together to the point of starting assembly.
I'll send a PDF to Brad and don't expect any body will have any trouble with black rectangles!


Cheers, Fred.

3 inch TV - The Parts


 
 Return to top of page · Post #: 10 · Written at 9:44:56 AM on 23 July 2017.
Brad's avatar
 Administrator
 Location: Greenwich, NSW
 Member since 15 November 2005
 Member #: 1
 Postcount: 5500

G'day Fred,

All images working here. Good stuff.


‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾
A valve a day keeps the transistor away...

 
 Return to top of page · Post #: 11 · Written at 7:06:56 AM on 24 July 2017.
Fred Lever's Gravatar
 Location: Toongabbie, NSW
 Member since 19 November 2015
 Member #: 1828
 Postcount: 570

Hi Brad, and All, the weird thing now is that I can view all the posted PDF's with any browser and NO black rectangles!
Seems odd that this has happened after the mother of all upgrades installed by MS on Windows 10, "this may take a while" it said and took an hour!! The PC affected now runs faster so they must have deleted a lot of junk in windows.
Naturally the internet is still the same ookla reports 5mb download, 0.8 upload as usual.

Back to 3" TV and i'm now up to seeing a picture and resolving many problems and will do a Pt 4 in due course.
Fred.


 
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