Pilot tv and 2 inch b&w

[dtryon]

I don't think I quite understand what your doing. Isn't the deflection on an old Sinclair TV magnetic and I believe the pilot used electrostatic. I would think the biggest problem would be the horiz and vert scanning not the heater voltage. How did you solve that problem?

Thanks,
Dennis

[timmy]

Originally Posted by dtryon

I don't think I quite understand what your doing. Isn't the deflection on an old Sinclair TV magnetic and I believe the pilot used electrostatic. I would think the biggest problem would be the horiz and vert scanning not the heater voltage. How did you solve that problem?

Thanks,
Dennis

Yes the Sinclair crt is electrostatic not magnetic. The heater voltage was criticle because it was .55 volts that had to be right since I already burned one of these crts out. I used a small center tap 12 volt trans and fed 6 volts to the secondary and with resistors got the voltage down to what I needed from the primary, 1 volt under load gave me just under .50 volts.

[decojoe67]

Just wanted to add that I would still mask the CRT in a smaller "double-D" style. You'll only lose a little bit of the edges of the picture, but it will look a whole lot more convincing. With construction paper it would be easy to make either the early white mask or the later black and gold pinstriped mask. Good luck!

[timmy]

Originally Posted by decojoe67

Just wanted to add that I would still mask the CRT in a smaller "double-D" style. You'll only lose a little bit of the edges of the picture, but it will look a whole lot more convincing. With construction paper it would be easy to make either the early white mask or the later black and gold pinstriped mask. Good luck!

Well I had the plans for the mask but I think it's a done deal because I really don't want to change much in the set with the higher cutoff voltages of the pilot and I'm not sure how to modify it simply to get it to work.

[decojoe67]

Originally Posted by timmy

Well I had the plans for the mask but I think it's a done deal because I really don't want to change much in the set with the higher cutoff voltages of the pilot and I'm not sure how to modify it simply to get it to work.

I would agree. There's still many of those Pilot TV's around in various states of repair. You might try to nab one with a rough cabinet for a reasonable price and hope the CRT is good. I know someone who haggled for a very nice one at a local antiques shop recently - he got it for $75! - and it turns out with a good CRT! That's about the only way to get the original white CRT these days, or even the green substitute, which is acceptable.

[timmy]

Originally Posted by decojoe67

I would agree. There's still many of those Pilot TV's around in various states of repair. You might try to nab one with a rough cabinet for a reasonable price and hope the CRT is good. I know someone who haggled for a very nice one at a local antiques shop recently - he got it for $75! - and it turns out with a good CRT! That's about the only way to get the original white CRT these days, or even the green substitute, which is acceptable.

That is so rare to get a pilot with a good crt but would be nice to find one. I already have a 3kp1 green crt in it and have spares but a white one would be great.

[John Marinello]

What if you put a red filter in front of the 3kp1?