The filter in the datasheet has the same topology and design frequency as one on the Atari schematics, so it has to introduce the same delay. Atari might have used parts from different vendors, but they had to keep the same parameters. The circuit actually will work without the delay line, and it is...

3.58MHz is a color subcarrier for the NTSC, but the delay line should introduce a... delay, and its nominal parameter is the delay time, which, for the NTSC, should be 63.5us. PAL color burst frequency is 4.43MHz and PAL 1H delay line is 64.0us. That's the theory... but you'll find answers for your ...

I had similar issues with Toshiba LCD TV, and a SCART cable, which was making RGB switching voltage from the V-Sync, using a diode and a capacitor.

Some TV doesn't support RGB over SCART, but even if they do, there are several problems. 1. STfm doesn't have a composite sync signal used by SCART RGB, instead composite video signal is used. 2. Some TV, have support for RGB mode, but make only automatic switching between composite and RGB. In RGB ...

bfollowell wrote: ↑Sun May 16, 2021 9:52 pm Sooooo, kind of like MyTek's Atari 1088XEL design for the 8-bits?

More like X_Angel's own Atari ITX (8-bit) project, which he did years ago:

Here you have:

Now, there is v2.0. It works with STe reliable, and really fast (~1MB/s). Unfortunately I can't make it to work with STf (with non-buffered ACSI port).

There's also ACSI2STM:
https://github.com/retro16/acsi2stm

But for now, I find it troublesome to run stable on different machines

4x256kbits are the biggest FPM DRAMs in DIP-20 packages I know about. They are in sockets probably for service reasons, not for expansion. There were different versions of those extension, with 8 DIP-20 sockets, or even with 4 30-pin SIMM sockets. It has a neat idea with this precision socket with s...

You still need to desolder the legs that's left behind so why twist it in the first place? You have good access to the whole area of the pad (most of the "leg" and pad is under the capacitor's can), so you can easily clean the residues of leaked electrolyte, scrape off or chemically disso...