UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post

ppppenguin · 20th Jul 2011, 2:21 pm

The 3 main published 405 modulator designs are David Looser's, Darius's and mine. David's and mine are based around the commonplace 1496 balanced modulator chip. Darius's has no chips at all. Mine uses the HF modulator cans from old Rediffusion converter boxes. Hence not really feasible now unless you have a couple around that haven't been raided. David's design, which predates mine, is essentially the same but built from scratch.

I think that both Darius's and David's designs can be found somewhere in the forum. Mine can be found on my website.

I would strongly recommend a video monitor rather than modulator and TV if you are trying to evaluate 405 video sources.

20th Jul 2011, 2:21 pm	#66
ppppenguin Retired Dormant Member Join Date: Dec 2003 Location: North London, UK. Posts: 6,168	Re: Simple memory card player idea The 3 main published 405 modulator designs are David Looser's, Darius's and mine. David's and mine are based around the commonplace 1496 balanced modulator chip. Darius's has no chips at all. Mine uses the HF modulator cans from old Rediffusion converter boxes. Hence not really feasible now unless you have a couple around that haven't been raided. David's design, which predates mine, is essentially the same but built from scratch. I think that both Darius's and David's designs can be found somewhere in the forum. Mine can be found on my website. I would strongly recommend a video monitor rather than modulator and TV if you are trying to evaluate 405 video sources.