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Old 11th Jan 2019, 12:35 pm   #3
Superscope
Octode
 
Join Date: May 2017
Location: St Austell, Cornwall, UK.
Posts: 1,018
Default Re: Help wanted with B/W TV Mod

Hi Studio263,

Thanks, I wasn't expecting a reply quite that fast.

The Base of Q801 is quite convenient to get at, and disconnect from R262, so I will hopefully
have time tonight to experiment on that.

Thanks for reminding me about the Bias, I'd not thought about that, but it should be fairly straightforward to set up a temporary adjustable Bias for testing to get the final required level.

The Audio side of things I don't have a problem with, that's fairly simple.

Regarding the UHF Modulator, that would for sure be a simpler solution, but I want to avoid up converting
the Video Signal just to have it down converted again with the associated loss of quality.
I have also had trouble with interference between Modulators and some Freeview Boxes in the past as well.

Most importantly for me though, is if I can successfully convert this Set, I will move on and try the same type of mod on one of my other portable Sets where there really is no room for a Modulator inside.

I bought this particular Sharp 5T especially for this experiment to gain some knowledge as it has plenty of room inside and all the Boards are quite accessible.


Ian
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