CurtPalme.com Home Theater Forum

[redfox001]

It was 120nH still small differnce.

[the dude]

Got some inductors. I testet 470nH and it looked OK. In the lower frequency pattern there was some streaking, but that was barely visible and only in test pictures.

Then i tried 680nH. It seems to be a little bit better at 48p, but at 60p 470n looked brigher i think. Not sure. It is hard to tell. Not even sure about that.

I think it depens on tubes also. The green PT22-22 seems to have different capatitance than my red P19LCP. I noticed a reddish tint in the 1:1 pattern with all colors on, wich makes me think the red is performing better. So i think the bad performance i get on green may be a indication of higher capacitance of the PT22, my pattern never looked as bright as on Redfox machine

It may also be true the 909 neckboards are made for LUG. Maybe the amps are real fast but can't provide enough current to charge a PT22-22 well even at lower frequencies.

Yesterday i got my hand on a 909 chasis So im not sure what to do next. I need to retube it, green and blue are unuseable. Red may be useabe, wear is barely visible (only in very bright light) but on a small area. The good thing is: Red is LUG. So i can build a machine with all LUG tubes. So i have some work to be done. Right now i think about reducing noise, this machine is a little to loud in my opinion. Maybe i should build a water cooling, i thought about that several times for my 1209 but it would be plenty of work, nothing that can be done in a few days.

So building a G1 drive has to wait. But i will try that for sure. When the 909 is on the ceiling (wich may take a while depending on what i do about the noise problem) i have a 1209s chasis with 909 neckboards to play with. I think the sanyo transistors may be perfect for making a G1 drive, since they could operate from the same 190V as the hybrid. Maybe a marquee neckboard is also an option. Tought about that to. The 909 amp boards could be used without the socket board to drive a eletrohome VNB. This will give us most of a working ABL and G2 regulator, but maybe would require to add the barco IBL stuff on the cathode. The drawback is the need of a extra PSU.

[the dude]

@gjaky: good point, maybe we simply could remove the negative clamping diode.

[redfox001]

If we agree on the clamping diodes that it is not a big risk than I will try that next.

Congratulations on the 909 chasis. One of the reasons I like the 909 neckboards is that they made the powersupply much better according to a technote. The 909 has increadable focussing power.

I got my better 1:1 after using the moome in stead of a fury that I tested as it came with an Eisseman modified chaine. But no measurements to proof it yet

[redfox001]

About the noise check for a jumper on the focusboard. If it is set to 12V it is at full speed. Different firmware seem to produce different noise. There is a cine max 2.13 firmware. Som say it is more quiet.

[the dude]

Hm, checked that. Already set to temp controlled. The 1209s has 4x 120mm fans. The 80mm on the tray are very noisy. Also there there is a small 40mm one on the PFC board. Hmmm. I don't want to flash the firmware, its the only controller board i have.

[redfox001]

Ok there is a guy on the repair forum that says it is fail save because you can set a jumper. He has read the firmware with an eeprom programmer seems he knows what he says but still I did not flash either.

That pfc comes in two models the one later has the little fan diagonal. Still also that one is very noisy I agree. But the other is even worse.

[the dude]

Damn! The set is dead

Removed some boards yesterday because i wanted to compare them to the 1209s and check out how a water cooling could be constructed, last i pulled was driver & switcher. Quite sure it was ok before that.

Now it powers on fine, EHT is running, ABL line visible on tubes but no picture. On vertical board "concidence" led is on, on switcher "mute" goes on after startup, then off and finally on again.

All green LED on G2 board are on. No reaction to remote (IR and build in), even power button as no function. I have to turn it off via the main switch.

All boards are seated well in the right place, no pin is damaged. Checked everything obvious a hundert times. Maybe controller? Or bad soldering on mainboard connector?

Quite clueless

I was afraid of that, i have every board (except the EHT) for the 1209s 3 times, but no parts for the 909.

[redfox001]

Did you try to boot without switcher and driver? I think there is no check for these boards at startup and perhaps you have a short that crashes the controller?

[redfox001]

By the way if you need a spare controller I have one with 2.20 software pretty quiet but a lot of hours. Not to pricy

[the dude]

Without driver EHT is absent. Thats the same as the 1209 since the G1 spot supression is on the driver. Remote still not working.

[the dude]

Thats good to know! But first of all i have to find out what the problem is...

[redfox001]

Other things to check.
Disconnect the internal remote
Disconnect the rs232 board's
Discoonect the convergence focus astig

I have had boot problems caused by the internal remote and the rs232 in the tray.

[redfox001]

You have the cable that connects switcher to controller connected? You have the jumper on the edge blend connector on the driver?

[the dude]

Removed internal remote -> no success.

Removed RS232 -> No success. Remote not longer working. Hmm - strange, since there is a rear receiver.

I will try the others later...

[the dude]

HURRY

You are my hero!

Now im feeling happy and stupid at the same time

It was the cable. In the 1209 the controller is in the cover and this cable has no pluggable connector on the main board, so you can't forget it. I tought the connection to the controller is done via the main board in the 909.

[redfox001]

Happens a lot

[redfox001]

[redfox001]

Or compare these:

without diode
Untitled by Radio Head, on Flickr

with
Untitled by Radio Head, on Flickr

[redfox001]

I also have a smps fail. Known problem with the standby voltage the thing was beeping my ears off. With the 909 you have to replace these 9V standby caps often with the older machines.