Amplifone 25" vector monitor

PCB problems and fixes
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boergi
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Amplifone 25" vector monitor

Post by boergi » April 16th, 2010, 10:44 am

I got my Atari Star Wars Cockpit yesterday. The monitor is missing so I'm looking for a replacement.

I already got a NOS 25" tube and I think I can get the HV- and deflection PCB on ebay.

Problem is that I only have the blank tube.
The following parts are missing:

A201113-01 YOKE AND HARNESS ASSY.
171010-001 CRT CONVERGENCE RING
A201044-01 MAGNETIC SHUNT ASSY.
A201114-01 DEGAUSSING COIL ASSY.
A201002-01 DAG SPRING ASSY.

Does anybody has this parts left from a damaged tube? or a complete one?

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uncletom
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Re: Amplifone 25" vector monitor

Post by uncletom » April 20th, 2010, 10:51 am

Check in any garbage disposal station, or garbage room for TVs as large or larger than 25". You can use any 30mm convergence rings for your CRT, take any old degauss coil and dag spring. The "magnetic shunts", if needed at all, you can use any metal pieces taped to long plastic or a instead. Or even better, use a newer CRT for your SW, one that perhaps has an automatic convergence function built in, many modern Philips CRTs has this, at least I've seen this on many 14" tubes.

The only thing, if you can't wind/re-wind you own yoke, is that you need the original yoke. It has like 1 ohm on either of its coils.

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Re: Amplifone 25" vector monitor

Post by boergi » April 20th, 2010, 6:34 pm

I found a Yoke from a Wells Gardner 6100. This should fit.
Scotty from HawkEye Picture Tube is looking for the other parts. I hope the force is with us. :P

I also need to find the HV and Deflection boards now.

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Re: Amplifone 25" vector monitor

Post by boergi » September 6th, 2010, 6:09 pm

I finally found a working pair of HV and deflection PCBs.
Also got a WG6001 deflection coil and the convergence rings.

Now I'm looking for a matching degauss coil.
I only have 19 and 29" monitors..

Can anybody help me out?

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Re: Amplifone 25" vector monitor

Post by trmatthe » September 8th, 2010, 9:17 pm

Hiya. Are you sure the 6100 yoke will work with the Amp 25"? I'd hate for you to burn out your deflection transistors by using an unmatched-impedance yoke.

It might be worth googling for "vector list" which is a mailing list based group of people who are incredibly knowledgeable about vector stuff. They'll tell you if your plan has legs or not.

I'd probably be more inclined to get onto Vector List and check your yoke compatibility options before worrying about degaussing - you'll know pretty quickly if the screen has an uneven magnetic field but that's a lot easier to fix than a dead deflection board.

Good luck and report back! Pics of your cockpit would be ace too - I've spent since last Autumn restoring my SWC into near-mint state :D

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Re: Amplifone 25" vector monitor

Post by Ordyne » September 16th, 2010, 5:22 pm

I could be wrong but I seem to remember the 6100 being the same scan coil?

I could be wrong though,, deffy check that out, maybe it was the 19" ampliphone that was the same ??!?!
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uncletom
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Re: Amplifone 25" vector monitor

Post by uncletom » September 16th, 2010, 5:45 pm

It's a 3 mm neck-diameter anyway, and the resistance should till be somewhere around 1 ohm each for H and V coils.

Ask someone with a 25 inch to measure his yoke, and compare that to the 19 inch yoke. I can almost bet it will be the same.

Have you checked the manual? What about the part numbers? Are they different?

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Re: Amplifone 25" vector monitor

Post by Ordyne » September 17th, 2010, 11:12 am

Just search on the net, it's already documented it's the same as something else.
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Re: Amplifone 25" vector monitor

Post by boergi » September 17th, 2010, 2:46 pm

it should be the same.

any ideas regarding the degauss coil replacement?
can i take one from a 29" nanao?

or does anyone knows someone with a broken monitor who could help me?

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uncletom
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Re: Amplifone 25" vector monitor

Post by uncletom » September 17th, 2010, 4:10 pm

Any deg.coil should do well. Just the lenght differs between the crt sizes.

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