Best place to source composite

General discussions or ideas about hardware.
Post Reply
Steve
Posts: 2570
Joined: Fri Sep 15, 2017 11:49 am

Best place to source composite

Post by Steve »

Hey all,

This might be a silly question? But please no silly answer! :D

If I wanted to source the best composite signal from the Falcon motherboard, where would I take it from. (Please I don't mean from the output connector, I mean specifically on the motherboard, the best source component)

Cheers
User avatar
exxos
Site Admin
Site Admin
Posts: 23497
Joined: Wed Aug 16, 2017 11:19 pm
Location: UK
Contact:

Re: Best place to source composite

Post by exxos »

Not even sure falcon has C-video.. possible as its driven from the MC1377... but its only called C-SYNC on there.. Even so, should really just use the video connector...

Capture.PNG
Capture.PNG (292.93 KiB) Viewed 2065 times
https://www.exxosforum.co.uk/atari/ All my hardware guides - mods - games - STOS
https://www.exxosforum.co.uk/atari/store2/ - All my hardware mods for sale - Please help support by making a purchase.
viewtopic.php?f=17&t=1585 Have you done the Mandatory Fixes ?
Just because a lot of people agree on something, doesn't make it a fact. ~exxos ~
People should find solutions to problems, not find problems with solutions.
Steve
Posts: 2570
Joined: Fri Sep 15, 2017 11:49 am

Re: Best place to source composite

Post by Steve »

So it looks like R31 would be the best place to solder a wire?

By the way, as far as I know the RF modulator takes a composite signal from MC1377 to create the RF. C-Sync should not only be carrying a sync signal, but also the composite image.
User avatar
exxos
Site Admin
Site Admin
Posts: 23497
Joined: Wed Aug 16, 2017 11:19 pm
Location: UK
Contact:

Re: Best place to source composite

Post by exxos »

Steve wrote: Tue Feb 02, 2021 1:36 pm So it looks like R31 would be the best place to solder a wire?
You would have to scope the signal, and on the monitor port.. the port should have a filter on it, so "soldering direct" could actually be worse.. If you want better video.. why not just use RGB.. composite is almost as bad as RF!
https://www.exxosforum.co.uk/atari/ All my hardware guides - mods - games - STOS
https://www.exxosforum.co.uk/atari/store2/ - All my hardware mods for sale - Please help support by making a purchase.
viewtopic.php?f=17&t=1585 Have you done the Mandatory Fixes ?
Just because a lot of people agree on something, doesn't make it a fact. ~exxos ~
People should find solutions to problems, not find problems with solutions.
Steve
Posts: 2570
Joined: Fri Sep 15, 2017 11:49 am

Re: Best place to source composite

Post by Steve »

I don't want to use composite as my main signal source. I just want it as a secondary output. I ripped out my modulator internals and fitted a standard composite jack. I guess I'll try wiring it to the output jack again, it's just I did try before without any luck. I might have done it wrong though, so I'll just have another go.
User avatar
Badwolf
Posts: 2231
Joined: Tue Nov 19, 2019 12:09 pm

Re: Best place to source composite

Post by Badwolf »

Steve wrote: Tue Feb 02, 2021 1:36 pm So it looks like R31 would be the best place to solder a wire?
I'd probably go for either leg of L28 depending on whether you want to be upstream or downstream of the ferrite bead.

BW.
DFB1 Open source 50MHz 030 and TT-RAM accelerator for the Falcon
DSTB1 Open source 16Mhz 68k and AltRAM accelerator for the ST
Smalliermouse ST-optimised USB mouse adapter based on SmallyMouse2
FrontBench The Frontier: Elite 2 intro as a benchmark
Post Reply

Return to “HARDWARE DISCUSSIONS”