John Bennett
Senior Member
Re: [ukvac] MAMEing
-------------------------- eGroups Sponsor -------------------------~-~>
eGroups eLerts
It's Easy. It's Fun. Best of All, it's Free!
http://click.egroups.com/1/9067/14/_/5935/_/969314071/
---------------------------------------------------------------------_->
In article <NCBBIIPJMLPBCDGPHHNGOEHBCMAA.egroups@freedomprojects.co.uk>,
D-Type <egroups@freedomprojects.co.uk> writes
>The biggest problem is the neck coil bobbin and yoke - if you could get this
>bit sorted out (i.e. made) and someone who knows his inductance to wind the
>coils then the rest of it would be easy, especially as the tube is the same
>as a raster one for a colour monitor.
I would have thought that the existing yoke and even the neck board
could all be used as is. The only serious difference between raster
scan monitors and vector monitors is that the horizontal deflection
oscillator on a raster scan monitor is often used to drive the line
output circuitry too (15KHz). On a vector monitor the line output
transformer (HT) is driven by an independent oscillator (a humble 555 on
Tempest).
A conversion kit for an existing Hantarex type monitor would probably
have an X amplifier, Y amplifier, an HT generation circuit and a bit of
spot kill protection. I suppose a small conversion card could be made
to drive the existing amplifiers and provide a separate drive for the
HT.
--
Clive Mitchell
DATA Imported from archives: originally posted by Clive Mitchell (clive@emanator.demon.co.uk)
-------------------------- eGroups Sponsor -------------------------~-~>
eGroups eLerts
It's Easy. It's Fun. Best of All, it's Free!
http://click.egroups.com/1/9067/14/_/5935/_/969314071/
---------------------------------------------------------------------_->
In article <NCBBIIPJMLPBCDGPHHNGOEHBCMAA.egroups@freedomprojects.co.uk>,
D-Type <egroups@freedomprojects.co.uk> writes
>The biggest problem is the neck coil bobbin and yoke - if you could get this
>bit sorted out (i.e. made) and someone who knows his inductance to wind the
>coils then the rest of it would be easy, especially as the tube is the same
>as a raster one for a colour monitor.
I would have thought that the existing yoke and even the neck board
could all be used as is. The only serious difference between raster
scan monitors and vector monitors is that the horizontal deflection
oscillator on a raster scan monitor is often used to drive the line
output circuitry too (15KHz). On a vector monitor the line output
transformer (HT) is driven by an independent oscillator (a humble 555 on
Tempest).
A conversion kit for an existing Hantarex type monitor would probably
have an X amplifier, Y amplifier, an HT generation circuit and a bit of
spot kill protection. I suppose a small conversion card could be made
to drive the existing amplifiers and provide a separate drive for the
HT.
--
Clive Mitchell
DATA Imported from archives: originally posted by Clive Mitchell (clive@emanator.demon.co.uk)