I thought this deserved it's own thread. It deals specifically with Yoke matching.
So a chassis arrived but the seller thought the yoke I spoke of was was the neck connector. He's chasing that up for me as he gave it away with the tube :o, but hopefully he can get it back for me. Anyway... It leaves me with a massive problem as the yoke for the chassis, a b&w Motorola 23VP111A, is matched to chassis like most, and there's nowhere I can find another.
It's the original chassis that was used in Sprint 2, so I was very happy to get it. Again, thought the yoke was coming too.. anyway, case it doesn't, I thought I put together a back up plan.
I dug out a yoke that came from a 20" philips tube. So first up I'm wondering if that will even deflect enough, the tube is 23 "?
I checked to see it it fits on the tube, and it does. The yoke readings were...
H 2.5
V 50
The new target has these values on the schematic.
H 2
V 30
I figured the Horizontal was pretty dam close, so left that and changed only the vertical.
So here are the two set ups. Please take a look and tell me if you think it will work?
First the wiring for the Nanao then following is the new wiring I set up for the Motorola.
I made sure to use 1W resistors, well the equivalent anyway. For each 50 ohm resistor I took two 100ohm 1/2 ohm resistors and put them in parallel. I'm thinking maybe two 100ohm 1 watt resistors in parallel might be better still?
I'm 90% sure that things will be OK if I power it up. I may not get the picture I'm after. The chassis was reported to have been working a week before it got pulled. I just want to get a few opinions. I'm ultimately responsible if it goes up in a cloud of smoke, but am keen to hear what people think on the topic. Cheers
I should also mention that using a meter the yokes now measures 35 Ohms. I think that's close enough to 30.
UPDATE: The seller has made contact with the guy and he's going to get it in the post next week. :)
Question
taito
I thought this deserved it's own thread. It deals specifically with Yoke matching.
So a chassis arrived but the seller thought the yoke I spoke of was was the neck connector. He's chasing that up for me as he gave it away with the tube :o, but hopefully he can get it back for me. Anyway... It leaves me with a massive problem as the yoke for the chassis, a b&w Motorola 23VP111A, is matched to chassis like most, and there's nowhere I can find another.
It's the original chassis that was used in Sprint 2, so I was very happy to get it. Again, thought the yoke was coming too.. anyway, case it doesn't, I thought I put together a back up plan.
I dug out a yoke that came from a 20" philips tube. So first up I'm wondering if that will even deflect enough, the tube is 23 "?
I checked to see it it fits on the tube, and it does. The yoke readings were...
H 2.5
V 50
The new target has these values on the schematic.
H 2
V 30
I figured the Horizontal was pretty dam close, so left that and changed only the vertical.
So here are the two set ups. Please take a look and tell me if you think it will work?
First the wiring for the Nanao then following is the new wiring I set up for the Motorola.
I made sure to use 1W resistors, well the equivalent anyway. For each 50 ohm resistor I took two 100ohm 1/2 ohm resistors and put them in parallel. I'm thinking maybe two 100ohm 1 watt resistors in parallel might be better still?
I'm 90% sure that things will be OK if I power it up. I may not get the picture I'm after. The chassis was reported to have been working a week before it got pulled. I just want to get a few opinions. I'm ultimately responsible if it goes up in a cloud of smoke, but am keen to hear what people think on the topic. Cheers
I should also mention that using a meter the yokes now measures 35 Ohms. I think that's close enough to 30.
UPDATE: The seller has made contact with the guy and he's going to get it in the post next week. :)
Edited by taitoLink to comment
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