OK I built the Moosmann amplifier, but only 1 amp out of 3 yet, from Markus's web page of http://translate.google.co.uk/translate?hl=en&sl=de&u=http://playoffline.wordpress.com/mod/nesrgb/&ei=FJoxToK0CY608QPpt5mhDg&sa=X&oi=translate&ct=result&resnum=1&ved=0CB4Q7gEwAA&prev=/search%3Fq%3Dhttp://playoffline.wordpress.com/mod/nesrgb/%26hl%3Den%26client%3Dfirefox-a%26hs%3D0BV%26rls%3Dorg.mozilla:en-GB:official%26prmd%3Divns
, I used a CTBC337-25 transistor (seller told me was Philips brand), and a CTBC557B that the other seller told me was Fairchild Semiconductor brand. Transistor pinouts were both the same as on Markus's web page (it seems). I used 1 per cent tolerance resistors, metal film type, and an electrolytic capacitor (i.e. polarised) in the amp, as prescribed by Markus on that page.
I wired up the PPU Green to the amp. IN, and Green OUT of amp. directly to pin 11 of SCART, no other cap's or anything. I left the Green Ground (pin 9 of SCART) dangling on a flying lead.
Now when I feed the NES into the Sony KV-14LT1U 14" FD Trinitron CRT 4:3 TV I get a picture (as before) since I have Composite Sync (yellow RCA inner pin from RF box on NES) wired direct to pin 20 of SCART, no other components in the path, and I have Green connected, but the picture is a hell of a lot brighter than the almost non existant picture that I was getting before.. I get music from the NES. I can see SMB 1 playing nicely on the screen BUT it's a little faint for my liking (maybe because the other 2 color components will make it brighter later on) and it's got wavy lines (but less than before) on the screen, and it's in Black and White, NOT green, which I thought was odd. Also if I connect pin 9 of SCART (Green Ground) to the NES PCB the picture is very dark (and still black and white).
The wavy lines dissappear when I ground pin 9 (green ground) to the NES PCB.
Not sure if this TV can even handle RGB LOL. There is no button on the remote for switching the TV to RGB either. I suppose that means I will need 1 to 3 V on pin 16 of SCART, and I assume that would also mean I have to ground pin 18 of SCART to the NES since pin 18 is the ground for pin 16?
However when I fed the same NES into the Sony 29" CRT TV (KV-29K5U) which can take RGB and 525 lines / 60 fields/sec, 3.58MHz NTSC, it WON'T sync (except now and again very briefly and then I can see that it looks OK brightness) and everything is distorted, unless I connect pin 9 of SCART (Green Ground) to the NES PCB and then it sync's but the picture then goes INCREDIBLY dark. Also both "pictures" are in black and white, same as my 14" TV when I know that this larger TV can do RGB or NTSC color at 3.58 or 4.43MHz.
Next I will try making 2 more amp's on my perf. board and try running a ground for Composite Sync onto the NES PCB, and will also try grounding the 3 colors of R, G and B.
Below is what my TV picture now looks like on my 14" Sony with my amplified Green. No grounds wired. Only 5V and ground from NES PCB to the amp. of course. The Moosmann amp. obviously works and the signal is way more than before. Ignore the colored red and blue curved fringes lines, they are aliasing from camera chip / CRT screen.
I just want to know why my picture is black and white on both TV's LOL.
EDIT: I just found out that if I disconnect the mono audio from the RCA input on the front of the TV the picture doesn't sync on the 14" TV unless I ground either Green or Composite sync and then I get a picture. I remember that on my brother's very similar 14" Sony upstairs (older model, not flat Triniton) the RCA video / audio sockets cannot be used at the same time as the SCART as they seem to be connected together internally inside the TV! And of course the audio ground from the mono audio is connected to the NES RF unit so that's where the return path for ground is coming from. Hence why when I connect the mono audio from the NES into the front of the TV it suddenly gets sync, as it's using the audio ground to ground the Composite Sync!
If I have both Composite Sync's Ground and Green's Ground connected together to the NES PCB I get a picture on the 14" TV, but the picture is quite dark compared to not grounding those. If I do the same on the 29" TV I get no picture at all. But if I connect just Green Ground to NES PCB and not CSync ground I get a picture on the 29" but it's incredibly dark (almost not there at all). This is annoying, what the hell do I do about this?