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Old 14 August 2015, 18:35   #301
John Man
 
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Oh, and just one other thing I noticed the other day and would like to show you all.

I own a "big" Panasonic CRT TV and when I went through the owner's manual instructions, on the page relating to audio/video connections there is a warning note specifically stating "do not connect to this device a computer with a TTL output of 5V".

Now, is that a coincidence or what?

Sorry for picture quality and language but it translates to exactly what I have written above.








So, this seems to backup and reinforce the idea that care should be taken when making connections involving certain types of signal and amplitude on TV's.

Fortunately, I don't remember ever connecting the Amiga to this TV and hopefully will not try to find out what happens untill I take proper precautions by making a cable with the 330ohm resistor.

Last edited by John Man; 14 August 2015 at 20:45.
 
Old 23 August 2015, 19:54   #302
John Man
 
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Quote:
Originally Posted by Stedy View Post

..., something I missed, is the DC offset of the Amiga video signal. Black level is about 600mV, it should be 0-50mV. This has an easy fix, on each of the RGB signals, add a 220uF capacitor, + end to the Amiga output. This will AC couple the video, with minimal droop...

Ian
Would this also apply to an Amiga 500?
 
Old 19 November 2019, 09:05   #303
fpmpaolo
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Age: 39
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Hello people, can I use a 150ohm instead of a 75ohm at pin 23 (SCART 16)?
"The BLANK signal (pin 16 of the SCART) is fed from +5V via a 75 ohm resistor, which together with the 75 ohm terminator in the TV, creates a voltage of 2.5V, adequate to RGB input mode."
Image says 47 to 270ohm acceptable range of values.
I couldn't find a 75ohm resistor at work.
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