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Non-NEC Console Related Discussion => Console Sales & Trades => Topic started by: bust3dstr8 on January 08, 2015, 08:48:20 AM

Title: FREE...with a catch. Populated LM1881 sync cleaner pcb
Post by: bust3dstr8 on January 08, 2015, 08:48:20 AM

I have a run of pcbs coming in for the LM1881. They where designed mainly for doing CMVS and Jamma Genesis, but should be small enough to fit in the end of a scart cable. They are 20mm X 13mm x 4mm.

So....I am looking for someone who wouldn't mind testing it out in a scart cable and sharing a few pics and their results.

USA only please :)

Title: Re: FREE...with a catch. Populated LM1881 sync cleaner pcb
Post by: PunkicCyborg on January 08, 2015, 09:11:19 AM

Bust I would be happy to test one, i have 2 monitors that need LM1881's to work and have installed them before

Title: Re: FREE...with a catch. Populated LM1881 sync cleaner pcb
Post by: ProfessorProfessorson on January 08, 2015, 10:08:05 AM

I could test one on the GBS8200, but not Scart. I hate Scart. f*ck scart. I hope Scart dies of cancer.

Title: Re: FREE...with a catch. Populated LM1881 sync cleaner pcb
Post by: bust3dstr8 on January 10, 2015, 12:48:03 PM

Thanks guys....I should have them out in about 10 days.

Title: Re: FREE...with a catch. Populated LM1881 sync cleaner pcb
Post by: bust3dstr8 on January 21, 2015, 08:12:16 AM

Boards are in and samples will be out in a few days.

(https://farm8.staticflickr.com/7574/16149635519_51ef4a1021_c.jpg)

(https://farm8.staticflickr.com/7331/16329990426_03f243a9fd_b.jpg)

Title: Re: FREE...with a catch. Populated LM1881 sync cleaner pcb
Post by: Fidde_se on February 16, 2015, 04:31:27 AM

Tested, and the verdict is... good stuff... mostly because it's so small, it's really tiny.

Not much difference between the monitors and TV's I tried, if any visible at all,
but that's also a good thing... as it's for mon/tvs having trouble with Composite Sync.

There is a slight color difference on sand colors (bleak yellow/light brown) when switching between
the built-in sync and composite and just a fragment of difference of that when using the sync cleaner, probably just because the Composites higher video voltage slips threw somewhere, other colors seems unaffected, and I'v tried filming it and taking a photo of it but the difference is just to small for the CCD to catch any of it.

Title: Re: FREE...with a catch. Populated LM1881 sync cleaner pcb
Post by: Fidde_se on February 24, 2015, 06:27:05 AM

Been checking some more.

The standard sync outputs around 0.8v while with the LM1881 outputs nearly 5v

(http://www.retrosampling.se/Temp/LM1881/Sync_Normal.png)
Standard sync

(http://www.retrosampling.se/Temp/LM1881/Sync_LM1881.png)
Bust3dstr8 sync cleaner

The boards are also very good soldered and the flux has been removed, top quality.