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  #121  
02-25-2018, 11:20 AM
hodgey hodgey is offline
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Quote:
Originally Posted by lordsmurf View Post
According to TVOne support, the CTB-100 and 1T-TBC share the same main circuit board -- but apparently the 1T-TBC has something added, which results in the decreased image quality. There's also a variant model which adds genlock: the 1T-TBC-GL. The only potential benefit of the 1T-TBC is that no current chipset defects have been reported by users online -- it's contained mostly to 2011 issue AVT-8710 and CTB-100 models.
I have taken some images (attached) of a newer TVOne 1-TBC (bought in 2016 or 2017 I think), and it looks as if the circuit board design has departed a bit more from the CTB-100. Taken with a cellphone camera, with sub-optimal lighting and settings, so the quality isn't great.

This unit also have issues with locked fields (similar to what's demonstrated here here) (though it's a bit visually different, as the AVT the field, while on the TVOne (not sure how to best describe it) rolls instead of being frozen still (I might be able to provide video if there is any interest). I haven't noticed any deteriorated image quality from it as reported in the linked thread, though I haven't done checks with test images, so it's possible that the image defects are present in this one as well.


Attached Images
File Type: jpg IMG_20180215_151322.jpg (123.5 KB, 20 downloads)
Attached Files
File Type: zip TvOne 1-TBC.zip (20.11 MB, 3 downloads)

Last edited by hodgey; 02-25-2018 at 12:10 PM. Reason: fix link
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  #122  
02-25-2018, 11:56 AM
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Correct. The 1T-TBC eventually also had the same problems as the AVT-8710/CTB-100. I've updated the post you've quoted with more updated/current accurate info.

The entire Cypress/AVT TBC ordeal ended quite sadly. No fix ever existed, simply a discontinued product.

Since Cypress/AVT serial numbers reflect the date of manufacturer, so only get TBCs made before 2010 to be safe. The AVT-8710 is green, the rarer CTB-100 is Smurfy-blue on gray (not muted blue on silver). Unfortunately, the 1T-TBCs never changed it's look, so it's not as simply as color. Must find/read the serial.

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  #123  
02-25-2018, 12:28 PM
BarryTheCrab BarryTheCrab is online now
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This might be nutty, but with all the gadgetry and 3D printers and electronic stuff, can someone with the correct knowledge actually build a TBC? Same for VCR parts, 3D printers? It's brave new world wizardry that might be applied to old world crappery?
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  #124  
02-25-2018, 01:41 PM
hodgey hodgey is offline
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I came across this the other day. It looks abandoned, but it suggests it's doable.
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  #125  
03-13-2018, 12:30 PM
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Quote:
Originally Posted by BarryTheCrab View Post
This might be nutty, but with all the gadgetry and 3D printers and electronic stuff, can someone with the correct knowledge actually build a TBC? Same for VCR parts, 3D printers? It's brave new world wizardry that might be applied to old world crappery?
Electronics can't easily be built with 3D printers, especially not capacitors. Maybe the raw component boards can be printed, maybe a case (a flimsy one), but that's it.

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Originally Posted by hodgey View Post
I came across this the other day. It looks abandoned, but it suggests it's doable.
Interesting.

Quote:
Originally Posted by endo
...
Your topic was moved here: VCR TBC memory mod to improve performance?

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  #126  
03-13-2018, 12:59 PM
hodgey hodgey is offline
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Originally Posted by lordsmurf View Post
Interesting.

I came across another DIY TBC project here. This person is using the same A/D converter as the one in the AVT8710, with a slightly differend D/A chip and a different microcontroller. Interestingly he's using the 16-bit colour mode of the SAA7114H, while the AVT uses the 8-bit colour mode (from what I can tell at least).
So it seems like it would indeed be possible to create something using off-the-shelf parts.
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  #127  
03-13-2018, 02:50 PM
BarryTheCrab BarryTheCrab is online now
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Quote:
Originally Posted by lordsmurf View Post
Electronics can't easily be built with 3D printers, especially not capacitors. Maybe the raw component boards can be printed, maybe a case (a flimsy one), but that's it.
My thoughts were 3D printing of rare or broken VCR parts, plastic armatures or gears, etc. Stock plastic or metal cases might be available for pennies with a little poking around. And am I wrong in thinking electronics of all sorts are available off-the-shelf for some clever under-grad to cobble together a TBC during lunch?

Last edited by BarryTheCrab; 03-13-2018 at 02:51 PM. Reason: spelling
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  #128  
03-13-2018, 02:54 PM
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I'd buy lunch.

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  #129  
11-02-2018, 08:23 AM
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Hi there,

Sorry to resurrect this old thread.
I'm a complete amateur and not interested in digitising VHS tapes, just projecting them through a digital projector.

Unfortunately some of my tapes are in bad condition, and the projector plays the video for a bit but intermittently shows 'no signal'.

Do you think a TBC could help me with this set-up?

Thanks

Max
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  #130  
11-02-2018, 08:32 AM
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Quote:
Originally Posted by Xithi View Post
Unfortunately some of my tapes are in bad condition, and the projector plays the video for a bit but intermittently shows 'no signal'.
Do you think a TBC could help me with this set-up?
For mere viewing, I'd look at using a Panasonic ES10/15 recorder on passthrough.
Try that first.

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