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Mike Parker Super 03 VIM is...well, Super:-)
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htguy1




Joined: 30 Jul 2008
Posts: 99
PostLink    Posted: Sat Dec 13, 2014 12:25 am    Post subject: Reply with quote

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mp20748 wrote:
Attached is my commercial version of my 02 VIM mod. It has two (2) mini boards, the red one is a power supply for the +/- 14 volt rail into the sample and Hold circuits (both int/ext). It corrects on that VERY noisy 14 supply rail, and provides a VERY clean +/- 12 volt supply for those circuits. This commercial version makes for an almost noiseless VIM. And that lends to a super black level performing VIM.




Hi Mike,

Are you going to do something like this for the 03p VIM?

You wanna sell a DIY kit for these mods? I would love to buy the parts and pay something for your R&D but I don't want to drop too much more money into my pj...



Thanks

God bless...
Mark
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jbmeyer13




Joined: 03 Dec 2010
Posts: 1135
PostLink    Posted: Sat Dec 13, 2014 1:33 am    Post subject: Reply with quote
Mp can speak for himself but i wouldn't hold your breath for a kit. Some of the soldering work is way beyond the avg. hobbyist. Without specialized tools you could get yourself in trouble real quick.
_________________
Projector: Modded 9501LC ULtra- MP VIM, Vold VNB, ETECH LVPS, Silver VIM Cables, HD10F's & a V1 case!
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jbmeyer13




Joined: 03 Dec 2010
Posts: 1135
PostLink    Posted: Tue Dec 16, 2014 5:44 am    Post subject: Reply with quote
This is the 03 VIM outputting 1080p/72 at 199.98mhz, Not only is the 1:1 spectacular but the linearity is spot on with plenty of light output.

Mr. Green



_________________
Projector: Modded 9501LC ULtra- MP VIM, Vold VNB, ETECH LVPS, Silver VIM Cables, HD10F's & a V1 case!
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koldby




Joined: 07 Feb 2007
Posts: 126
Location: Denmark

TV/Projector: GJAKY modded VDC marquee 9500lc ultra
PostLink    Posted: Wed Dec 24, 2014 4:39 am    Post subject: Reply with quote
[quote="mp20748"]Got in some mini RCA's

Trying it on the Commscope cable:
/quote]

Wouldn´t it be a good idea to change the connectors on the boards and on the cables to something a little more RF freindly?
As a former RF techiciant I would rate RCA connectors only a step above banan plugs Laughing

The correct way to transmit a high bandwith signal is to insure the charecteristic impedanse all the way from transmitter to reciever is the same over the bandwith transmitted. I could suggest something like a 75 ohm version of SMB or MCX.
With RCA connectors you probably get standing waves on the cable resulting in ringing on the signal and RF transmitted noise.

Koldby
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mp20748




Joined: 12 Sep 2006
Posts: 5681
Location: Maryland

TV/Projector: 9500LC Ultra / Super 02 and 03 VIM
PostLink    Posted: Wed Dec 24, 2014 6:47 am    Post subject: Reply with quote
[quote="koldby"]
mp20748 wrote:
Got in some mini RCA's

Trying it on the Commscope cable:
/quote]

Wouldn´t it be a good idea to change the connectors on the boards and on the cables to something a little more RF freindly?
As a former RF techiciant I would rate RCA connectors only a step above banan plugs Laughing

The correct way to transmit a high bandwith signal is to insure the charecteristic impedanse all the way from transmitter to reciever is the same over the bandwith transmitted. I could suggest something like a 75 ohm version of SMB or MCX.
With RCA connectors you probably get standing waves on the cable resulting in ringing on the signal and RF transmitted noise.

Koldby



You are 100% correct here. We thought about changing to the better impedance matched connectors and cables, but slipped our mind. Surely there is problems with the mini RCAs. It gets worse the higher the bandwidth. The impedance ringing shows as various degrees of color shifting on test patterns. It can be somewhat tamed by making sure the mini RCAs are well connected and tight
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