I've been trying to find out information about the UM1286 modulator, specifically what each screw adjusts. Today I have finally found that information hidden inside the service manual for the Memotech MTX 500/512, no wonder it took me so long to find!
The manual can be found at http://www.primrosebank.net/computers/m ... anuals.htm - be sure to download 'MTX 500/512 Service Manual and Technical Information (5MB)' and not the larger size download. The relevant details, including how best to test and set the modulator, can be found on pages 42 and 43.
Does anyone know what 'cable compensators' do?
Information about the ASTEC UM1286 Modulator
Re: Information about the ASTEC UM1286 Modulator
I think they might compensate for the ca... No, I have no ideaAlastair wrote:Does anyone know what 'cable compensators' do?
Maybe something to do with matching impedance of the co-ax?
Re: Information about the ASTEC UM1286 Modulator
The funniest thing is I did that pdf version of the MTX 500/512 Service Manual and Technical Information!
I got the manual from a friend and reconstructed as close as possible to the original, including damaged illustrations.
I never thought it would be useful here years later...
I got the manual from a friend and reconstructed as close as possible to the original, including damaged illustrations.
I never thought it would be useful here years later...
Re: Information about the ASTEC UM1286 Modulator
Wow, it's a small world. Either that or you Rob are a colossus in the world of retro computing.robcfg wrote:The funniest thing is I did that pdf version of the MTX 500/512 Service Manual and Technical Information!
Re: Information about the ASTEC UM1286 Modulator
Thanks for the compliment!
It is indeed a small world. It's true that I've done a lot of preservation stuff too but nowhere near some people I know.
Always glad to help!
It is indeed a small world. It's true that I've done a lot of preservation stuff too but nowhere near some people I know.
Always glad to help!