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Marquee Modifications and Performance Enhancement
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Nashou66



Joined: 12 Jan 2007
Posts: 16170
Location: West Seneca NY


PostLink    Posted: Sun Nov 03, 2013 12:59 am    Post subject: Reply with quote


        Register to remove this ad. It's free!
Mine shipped the next day. I'm going to try to fix Justin's VDM using parts from extra VDMs I have. This way if the amps blow at least they are the older versions. Got his CVA going while not on the heat sink, once I get the VDM going I'll test both together on the heat sink.

I was testing Caps with my LCR meter( no ESR) and found some interesting traits.

With high value lyrics tested 470uf and 560uf changing the frequency on the LCR meter changes the value little from 100hz to 120hz but when you hit 1khz the uf double almost, when tested with a 22uf lytic not much of a change.

Now I tried a wet tant 120uf it stayed stable with 100 and 120hz but went lower to 75uf with 1 kHz.

Now I have some Oscons these were the most stable, no major change across the three frequencies. I wish they made these in higher voltages and uf ranges!!!!

Since Mike used a 16 volt 33uf dry rant on the CVA I might now use either the new PosCons there or some Os cons I have 20vdc
values .

Nashou

Nashou

_________________
Don't blame your underwear for your crooked ass~ unknown Greek philosopher


"Republicans believe every day is the Fourth of July, but the Democrats believe every day is April 15." --- President Reagan

One Smart Dog!!!

Marquee High Performance Bellows now shipping!!
Marquee Modifications and Performance Enhancement
Marquee C-element and Bellow removal


Last edited by Nashou66 on Sun Nov 03, 2013 12:11 pm; edited 1 time in total
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gjaky



Joined: 05 Jun 2010
Posts: 2647
Location: Budapest, Hungary


PostLink    Posted: Sun Nov 03, 2013 7:42 am    Post subject: Reply with quote

Probably the big cap fools your tester...
At the university we measured some caps with a professional Wayne-Kerr component analyser, that could measure up to 3MHz. Unfortunately the caps didn't have the same capacitance rating, yet it is obvious how they are related.
The upper diagrams shows the effective capacitance vs. frequency, the lower shows where is the resonant point of the cap, after the resonant point the cap behaves more like an inductor instead of a capacitor.
You can speed up a capacitor if you connect with them parallel faster ones, so for example if you connect parallel an 1uF foil cap and a 100-200nF ceremic cap with a standard 470uF electrolytic cap, it can make wonders, and cheaper than buying individual magic caps.



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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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mp20748



Joined: 12 Sep 2006
Posts: 5358
Location: Maryland

TV/Projector: 9500LC Ultra / Super 02 and 03 VIM


PostLink    Posted: Sun Nov 03, 2013 8:32 am    Post subject: Reply with quote

gjaky wrote:
.......... so for example if you connect parallel an 1uF foil cap and a 100-200nF ceremic cap with a standard 470uF electrolytic cap, it can make wonders, and cheaper than buying individual magic caps.


Yep, and that's the main reason why you won't find expensive designer caps in video circuits. There's really no need or benefit to using them.
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Nashou66



Joined: 12 Jan 2007
Posts: 16170
Location: West Seneca NY


PostLink    Posted: Thu Nov 14, 2013 6:41 am    Post subject: Reply with quote




Very Happy Very Happy Very Happy

_________________
Don't blame your underwear for your crooked ass~ unknown Greek philosopher


"Republicans believe every day is the Fourth of July, but the Democrats believe every day is April 15." --- President Reagan

One Smart Dog!!!

Marquee High Performance Bellows now shipping!!
Marquee Modifications and Performance Enhancement
Marquee C-element and Bellow removal
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stridsvognen
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PostLink    Posted: Thu Nov 14, 2013 7:56 am    Post subject: Reply with quote

I hope it looks better on screen than the cabeling. Wink

Is it working.?
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barclay66



Joined: 27 Jun 2011
Posts: 1250
Location: Germany

TV/Projector: Marquee 9500 Ultra


PostLink    Posted: Thu Nov 14, 2013 12:48 pm    Post subject: Reply with quote

Nash,

Can You share this mod's functionality with us? It looks to me like an additional ROM which feeds the D/A converter for the vertical deflection signals. Somekind of automatic aspect ratio or anamorphic adjustment?

Regards,
barclay66
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stridsvognen
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PostLink    Posted: Thu Nov 14, 2013 1:01 pm    Post subject: Reply with quote

It looks like the banding mod.. I asked about that mod once, but there was never any feedback that confirmed it working, and it was way to expensive for my taste.

http://www.curtpalme.com/forum/viewtopic.php?t=29526&highlight=marquee+banding+mod
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mp20748



Joined: 12 Sep 2006
Posts: 5358
Location: Maryland

TV/Projector: 9500LC Ultra / Super 02 and 03 VIM


PostLink    Posted: Thu Nov 14, 2013 1:18 pm    Post subject: Reply with quote

I had that mod also.

It works, but at the same time, you WON"T be able to adjust the convergence in some of the zones. Not if the problem was vertical direction or horizontal, but you'll not be able to get all zones to align. Not sure why the mod had this effect on the the convergence.

Also, and if you're running really high resolutions, it'll make some areas on the screen appear too dense (scan lines pressed together).
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Nashou66



Joined: 12 Jan 2007
Posts: 16170
Location: West Seneca NY


PostLink    Posted: Thu Nov 14, 2013 2:51 pm    Post subject: Reply with quote

From what I tested it seems ok so far..... but that was a rough convergence and at 1:30 am i really wanted to get it done.

There did seem to be a few spots that were off but I noticed my convergence timing is off and I have to adjust than first, and then adjust the geometry alignment as well. I think the former is what is key. But doing the geometry alignment is more difficult than the convergence timing. And if that is the case it be hard for the end user to use unless they know how to do those timings.

I think the key is very short wire lengths. Mine are a bit long but I think the shorter would be better.

It is a bitch to do tho.

Athanasios

_________________
Don't blame your underwear for your crooked ass~ unknown Greek philosopher


"Republicans believe every day is the Fourth of July, but the Democrats believe every day is April 15." --- President Reagan

One Smart Dog!!!

Marquee High Performance Bellows now shipping!!
Marquee Modifications and Performance Enhancement
Marquee C-element and Bellow removal
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Nashou66



Joined: 12 Jan 2007
Posts: 16170
Location: West Seneca NY


PostLink    Posted: Mon Nov 18, 2013 3:41 am    Post subject: Reply with quote

Focus Board Pics back up!! Got o first page for direct links

Nashou

_________________
Don't blame your underwear for your crooked ass~ unknown Greek philosopher


"Republicans believe every day is the Fourth of July, but the Democrats believe every day is April 15." --- President Reagan

One Smart Dog!!!

Marquee High Performance Bellows now shipping!!
Marquee Modifications and Performance Enhancement
Marquee C-element and Bellow removal
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Nashou66



Joined: 12 Jan 2007
Posts: 16170
Location: West Seneca NY


PostLink    Posted: Fri Dec 06, 2013 4:37 am    Post subject: Reply with quote

Well I came up with a better method to do this mod. the one earlier in the post takes a long time. Then i tried another way but that also did not optimally end well. had some issues due to connection problems etc.It was causing a LVPS short but on the 24 volt line!! No 24 volt line on CLM so the signals to the CVA must be crossing on that mod. But this last method seems the best but one issue is the Upside down socket I used pops off. I can try to solder it to the chip under it but that can cause some short between pins. It may have to be hot glued down. I only did a rough convergence on my not set up well test PJ in my shop, no scheimfluge , corner focus, astir and greyscale etc. its just my PJ i test stuff in case I blow up something I won't care Wink

Here are some pics.

First some beer… Very Happy



What I did was bend out the clips not used and cut them off. Then
I soldered the programed banding Chip to the upside down Socket.











Here you can see the socket upside down on the board chip with the new chip on top.
I had to cut out the angled corner to get it to fit. I might leave the angle and just force it on next time to hold the socket onto the existing board chip.







And the rough convergence. There was no banding. With this method I won't be afraid to try it on one of my Longbows.



Very Happy

Nashou

_________________
Don't blame your underwear for your crooked ass~ unknown Greek philosopher


"Republicans believe every day is the Fourth of July, but the Democrats believe every day is April 15." --- President Reagan

One Smart Dog!!!

Marquee High Performance Bellows now shipping!!
Marquee Modifications and Performance Enhancement
Marquee C-element and Bellow removal
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Nashou66



Joined: 12 Jan 2007
Posts: 16170
Location: West Seneca NY


PostLink    Posted: Tue Dec 10, 2013 6:41 pm    Post subject: Reply with quote

Re organized the Test bed area so I can now freely swivel the marquee around for testing
by moving the Sources from the PJ table to their own table.



And my messy work bench. I moved the scope from where the Sources are now( different table).

I had a drill press on the left side of the work bench but moved it to a new spot on its own table. When drilling, metal shavings would fly onto PBC boards !! Not good if you know what i mean.



nashou

_________________
Don't blame your underwear for your crooked ass~ unknown Greek philosopher


"Republicans believe every day is the Fourth of July, but the Democrats believe every day is April 15." --- President Reagan

One Smart Dog!!!

Marquee High Performance Bellows now shipping!!
Marquee Modifications and Performance Enhancement
Marquee C-element and Bellow removal
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Melifluonze



Joined: 25 Nov 2013
Posts: 248
Location: Upstate NY

TV/Projector: 9500LC Ultra (Vidikron)


PostLink    Posted: Wed Dec 11, 2013 5:01 am    Post subject: Reply with quote

Hey! There's MY HDM! Shocked

What're you doing with my HDM?

- Melifluonze

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Theater under construction!
9500LC Ultra, DLA-RS10/RS40 (Gaming/3D)
Aria 5 Focal custom speaker, HT Tuba

We don't need no stinkin' 7.1!
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Nashou66



Joined: 12 Jan 2007
Posts: 16170
Location: West Seneca NY


PostLink    Posted: Wed Dec 11, 2013 5:29 am    Post subject: Reply with quote

LOL, Ummm nope ! Wink

Nashou

_________________
Don't blame your underwear for your crooked ass~ unknown Greek philosopher


"Republicans believe every day is the Fourth of July, but the Democrats believe every day is April 15." --- President Reagan

One Smart Dog!!!

Marquee High Performance Bellows now shipping!!
Marquee Modifications and Performance Enhancement
Marquee C-element and Bellow removal
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tse



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


PostLink    Posted: Wed Jan 01, 2014 4:36 pm    Post subject: Reply with quote

Nashou66 wrote:



Very Happy Very Happy Very Happy


There is a way to do this with PCBs....

Scott



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"Were we directed from Washington when to sow and when to reap, we would soon want bread."

Thomas Jefferson
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Nashou66



Joined: 12 Jan 2007
Posts: 16170
Location: West Seneca NY


PostLink    Posted: Wed Jan 01, 2014 4:45 pm    Post subject: Reply with quote

Yep that was my plan scot but I couldnt find the right gull wing connectors to go from SMD to PIN's

Can you email me the part numbers? I did it another way I reversed the socket and left the chip on the board but still had to lift the dac pins.

Nashou

_________________
Don't blame your underwear for your crooked ass~ unknown Greek philosopher


"Republicans believe every day is the Fourth of July, but the Democrats believe every day is April 15." --- President Reagan

One Smart Dog!!!

Marquee High Performance Bellows now shipping!!
Marquee Modifications and Performance Enhancement
Marquee C-element and Bellow removal
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Nashou66



Joined: 12 Jan 2007
Posts: 16170
Location: West Seneca NY


PostLink    Posted: Fri Jan 03, 2014 12:43 am    Post subject: Reply with quote

Just put my PJ back in to the shop after the Solar panel Inverter instal.

I made the table smaller and I have more room to walk around it and still kept the turntable feature.




Watch the video below to see how I have it set up.



http://www.youtube.com/watch?v=9ywN3t0rffg&feature=youtu.be

_________________
Don't blame your underwear for your crooked ass~ unknown Greek philosopher


"Republicans believe every day is the Fourth of July, but the Democrats believe every day is April 15." --- President Reagan

One Smart Dog!!!

Marquee High Performance Bellows now shipping!!
Marquee Modifications and Performance Enhancement
Marquee C-element and Bellow removal
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Nashou66



Joined: 12 Jan 2007
Posts: 16170
Location: West Seneca NY


PostLink    Posted: Tue Jan 21, 2014 6:24 pm    Post subject: Reply with quote

Got the Boards back! Now when I find some time I'll have to see if they fit correctly.
Other wise I'll have to make adjustments to my original design and have another set made.
Lining up the parts so they fit over the top of the existing
parts is a challenge . I hope I got it right the first time.



On the one set with out the cap pads I forgot a via for the power pin on the DAC0800, but
I can jump a fly wire to it.

Hopefully in the next few days I can get to this and see how they work.

Nashou

_________________
Don't blame your underwear for your crooked ass~ unknown Greek philosopher


"Republicans believe every day is the Fourth of July, but the Democrats believe every day is April 15." --- President Reagan

One Smart Dog!!!

Marquee High Performance Bellows now shipping!!
Marquee Modifications and Performance Enhancement
Marquee C-element and Bellow removal
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Nashou66



Joined: 12 Jan 2007
Posts: 16170
Location: West Seneca NY


PostLink    Posted: Tue Jan 21, 2014 7:10 pm    Post subject: Reply with quote

Had to try a mock up!!!



From what I can see underneath I think I lined up the DAC pads pretty well. The cool thing
is on the other side the pads for the socket are much longer than the DAC pads you see on top.
So there is wiggle room to place the socket side to side, but if the pads are not lined up the long way
then I'll have to make another attempt. I few tenths of a mm I might be able to
make it fit.

On the next board I will try to angle some of the traces and also
add a mounting hole in the same location of the existing one on the CLM and the
SWB. Then the board will be kept in place with the screw to stand offs.

Nashou

_________________
Don't blame your underwear for your crooked ass~ unknown Greek philosopher


"Republicans believe every day is the Fourth of July, but the Democrats believe every day is April 15." --- President Reagan

One Smart Dog!!!

Marquee High Performance Bellows now shipping!!
Marquee Modifications and Performance Enhancement
Marquee C-element and Bellow removal
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draganm



Joined: 08 Mar 2006
Posts: 8769
Location: Colorado


PostLink    Posted: Wed Jun 18, 2014 5:57 pm    Post subject: Reply with quote

looks like Pani just released a new line of Hybrid caps in SMD and through hole, ultra low ESR, high ripple rating

Quote:
Panasonic Electronic Components manufactures Capacitors in a broad range of technologies that can be used in the most demanding applications. OS-CON parts are characterized by a long life span and minimal changes in ESR throughout the entire rated temperature range. POSCAP (Tantalum Polymer) parts demonstrate a high reliability and high heat resistance, making them the ideal Chip Capacitor for digital, high-frequency devices and more. The SP-Cap (Aluminum Polymer SMD) line from Panasonic consists of multiple series that offer capacitance range up to 560µF, voltage range from 2V to 16V, and the lowest ESR/impedance in the industry, achieving very good noise suppression and transient response. Unlike MLCCs, SP-Caps are free from temperature drift and DC/AC bias characteristics. The EEH-ZA and the EEH-ZC series take the benefits of both electrolytic and aluminum polymer capacitor technologies and combine them, producing a capacitor with low ESR, low leakage current, high ripple current and smaller case sizes.

white paper

http://www.mouser.com/pdfdocs/Panasonic_Capacitors_WP_final.PDF

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MARQUEE HD MODS: Bring your Marquee CRT projector (or clone) back up to spec and offer even greater performance!
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