Kortek KTM-F 19”

[Bods]

Do you mean they're the high impedance type (like the one above)? You can tell if it's a high impedance chassis by looking at the vertical deflection area. If there's a multilegged TDA1675 chip same as what they use on the Hantarex MTC9000, it's for a standard low impedance yoke. If it's got two separate transistors instead, it need a high impedance yoke. You can convert certain yokes to high impedance, for example someOrion crt yokes can be converted easily by swapping a couple of winding wires on the yoke itself where it solders to the yoke wire connection terminals.

Interesting info, cheers

Just had a look, they slightly different to one above, both same model one missing control pcb but both with 2 transistors so High Impedance then, I tried them on a tube a couple of years ago and working but reduced height

 

[tb2000]

Interesting info, cheers

Just had a look, they slightly different to one above, both same model one missing control pcb but both with 2 transistors so High Impedance then, I tried them on a tube a couple of years ago and working but reduced height

Ah right, yeah if you've got a compatible Orion crt, if I remember correctly the vertical winding is actually two windings wired in parallel, so it's about 14 ohms, if you detach the wires and wire it in series, it gives about 40-50ohms. I can't remember right now exactly how to do it but that's the basic idea. You could probably use one of those chassis on a G07 crt as those yokes are high impedance, but you'd probably get pincushion issues as those crts need a chassis with a pincushion transformer which the G07 has on board if I remember correctly. Similarly, using a G07 chassis on a crt that doesn't require a pincushion transformer causes pincushion issues, so the transformer has to be disabled (G07 on a later crt that doesn't require a pincushion transformer also generally needs a different neck heater resistor as the image will be way too intense as the heater's somewhat overdriven but that's a different conversation!)

 

[Bods]

Ah right, yeah if you've got a compatible Orion crt, if I remember correctly the vertical winding is actually two windings wired in parallel, so it's about 14 ohms, if you detach the wires and wire it in series, it gives about 40-50ohms. I can't remember right now exactly how to do it but that's the basic idea. You could probably use one of those chassis on a G07 crt as those yokes are high impedance, but you'd probably get pincushion issues as those crts need a chassis with a pincushion transformer which the G07 has on board if I remember correctly. Similarly, using a G07 chassis on a crt that doesn't require a pincushion transformer causes pincushion issues, so the transformer has to be disabled (G07 on a later crt that doesn't require a pincushion transformer also generally needs a different neck heater resistor as the image will be way too intense as the heater's somewhat overdriven but that's a different conversation!)

Pretty sure I was looking at the tube in my Millipede as it's G07 and was going to test on that, it's got really bad screen burn from Hyper Sports it was converted too though, monitor works okay but will need replacing when it's converted back to millipede

will have to look if I have any Orion Tubes, If not I'll get them up for sale at some point

 

[Yakama]

I've got 2 Kortek chassis I got working and then find I don't have suitable tubes for them as not replacement for Hantarex

Hi. Are they KTM-F 19” chassis? I’m after one for a lordsvale neo geo cabinet if you do decide to sell