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Ampro 4600 focus

 
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papalek



Joined: 08 Mar 2006
Posts: 1537
Location: Longs SC


PostLink    Posted: Sun Sep 22, 2019 6:40 pm    Post subject: Ampro 4600 focus Reply with quote


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Is there a way to get more magnetic focus? They were all good for a long time but things started looking a bit off all across the screen. So I checked test screen and it was blurry. I adjusted the magnetic focus. Center is perfect and top and bottom are very nice. But both left and right on all tubes are maxed out on the settings and a bit blurry still.

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My current list of PJ's AmPro 1 1/2-4600,4200, 1/2-3600,2600.
I do love my AmPro's
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HaydnG90



Joined: 22 May 2006
Posts: 1248



PostLink    Posted: Sun Sep 22, 2019 6:50 pm    Post subject: Reply with quote

Increase frequency if pj can handle more bandwidth. I'm running 1080/72Hz which was noticeably sharper than 1080/60
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gjaky



Joined: 05 Jun 2010
Posts: 2724
Location: Budapest, Hungary


PostLink    Posted: Sun Sep 22, 2019 7:44 pm    Post subject: Re: Ampro 4600 focus Reply with quote

papalek wrote:
Is there a way to get more magnetic focus? They were all good for a long time but things started looking a bit off all across the screen. So I checked test screen and it was blurry. I adjusted the magnetic focus. Center is perfect and top and bottom are very nice. But both left and right on all tubes are maxed out on the settings and a bit blurry still.


I'd suggest to check if the adjustments make any difference at all? Also, see if your astigmatism is dialed in right?

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projectors in the past : NEC 6-9PG xtra, Electrohome Marquee 6-7500, NEC XG 1351 LC ( with super modified Electrohome VNB neckboard !!!)
current: VDC Marquee 9500LC
The MOD: VNB-DB
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papalek



Joined: 08 Mar 2006
Posts: 1537
Location: Longs SC


PostLink    Posted: Sun Sep 22, 2019 9:47 pm    Post subject: Reply with quote

I reset the adjustments back to 50% and made slight adjustments back and forth. I realized that the center and edges effect each other. I was able to get it way closer than it was before. Not perfect but way better.
_________________
My current list of PJ's AmPro 1 1/2-4600,4200, 1/2-3600,2600.
I do love my AmPro's
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