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dturco

Are Ampro magnetics usable in the Marquee chassis without major surgery?

Nashou66 · Joined: 12 Jan 2007 Posts: 16171 Location: West Seneca NY

The Ampro magnets gave birth to the Frankenyoke of Chris Johnson.

Only think is no Astig windings and you'll have to wire them up properly.

Athanasios

dturco · Posted: Wed Oct 20, 2010 4:46 pm Post subject:

Nashou66 · Joined: 12 Jan 2007 Posts: 16171 Location: West Seneca NY

Only if you do not have 6 pole CPC magnets. Marquees that have electronic astig some times only have 2 pole or 4 pole.

If your good at dialing those electronic helps very little. But if you are missing the 6 pole magnet then your more likely to need the
Electronic astig and it does help in the corners and edges. I have been thinking of some how removing the astig winding in the Marquee coil and still using then with the ampro coils, but i dont have any to test with(ampro). I do not want to take apart the 3600 I have for testing this out either.

Athanasios

cmjohnson · Joined: 03 Apr 2006 Posts: 5180 Location: Buried under G90s

I'm not 100 percent sure that no AmPro has focus coils that have astig coils in them. It's possible that some do have those windings on
the coils, but they were not used in the projector.

The number of connection pins on the focus coil will tell the tale. Five pins is focus only. (One pin is ground, always, with K-D yokes.)
You're looking for nine pins in the connector. Those will have astig coils.

But the K-D (Kanto Denshi, the manufacturer) focus coils found in AmPros can give excellent performance even without astig windings. They are quite useful for upgrading Marquee 8000s which never had astig windings in the first place.

Their magnetic strength is likely to be a little off for a Marquee, but should be close enough that you can achieve good focus before
running out of adjustment range.

CJ

dturco · Posted: Wed Oct 20, 2010 9:53 pm Post subject:

tse · Joined: 03 May 2006 Posts: 1014 Location: Sweatbucket, Fl.

Ampro didn't make a projector with dynamic stig adjustment. The magnets shown at the link are from a 4200 (4205 if Panasonic tubes). There are two windings of about 180uH (IIRC) each for focus. That is way wrong for Marquee chassis. There are no stig windings in the magnets.

Scott

dturco · Posted: Thu Oct 21, 2010 12:02 am Post subject:

Well that settles that. Marquee magnetics will go back in.

banzairun · Joined: 10 Jul 2006 Posts: 129 Location: NJ

yeah, I was looking into using them on my V1 before you grabbed that stuff from me, Dave.. the SB-C9110 coils have 9-pins but no astig windings, and the coils read nothing like a marquee's -- If they were useful I'd have probably tried playing around with them.

Only the 4300 (& the 4600 I guess?) have the KF-2211K coils which can be hacked into frankenyokes, I believe (haven't read up on them in a while). The 9110 is quite a bit smaller than the 2211, so I imagine they're not too useful.

While I'm here; what is the difference between a 4300 and a 4600?