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psilvest
Joined: 27 Jan 2007
Posts: 44
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| Posted: Mon Mar 17, 2008 9:26 pm Post subject: P16LMJ07 tubes - good for G70? |
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Hi,
I can get (at an interesting price) a set of new P16LMJ07 tubes, which are for NEC retroprojectors but which - I am told by the seller - can be used in my G70 after the G2 pin is jumpered, making them equivalent to P16LJE07 and directly useable in a G70.
Still, I see in
http://www.curtpalme.com/Sony_G70_Tube_Swap10.shtm
that further modifications are needed on the C-blocks to use P16LJE07 (G70 tubes are P16LJE08).
Has anybody some experience with these tubes?
Thanks,
Pier
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Mark_A_W
Joined: 15 Mar 2006
Posts: 3068
Location: Sunny Melbourne Australia
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| Posted: Tue Mar 18, 2008 4:24 am Post subject: |
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If they are NEC retro tubes (I think they are - get a picture to confirm), then they are electrically identical to a P16LJE07, and a P16LJE07 can be made to work in a G70.
So yes it could be done. It's the G1 pin from memory and you'll need to add a resistor - search for P16LJE07 mods in AVS archive. Posts by Chris Bigos and Chuchuf will help you find the info.
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psilvest
Joined: 27 Jan 2007
Posts: 44
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| Posted: Tue Mar 18, 2008 2:15 pm Post subject: |
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Mark,
The tubes come from a NEC XG-751RP retro projector and are P16LMJ07 for sure. They have the HV lead on the side (any problem in a G70 from this?).
I think your point about the G1 and the resistor (from KH, ie G3, to ground) is the same as what shown in the link I posted, to go from LJE07 to LJE08, so to speak. Thanks anyway.
The question I have is that, though LMJ07 and LJE07 are electrically equivalent, the pins apparently are not the same and a small mod is needed.
If anybody could confirm this it would be very helpful.
Pier
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Mark_A_W
Joined: 15 Mar 2006
Posts: 3068
Location: Sunny Melbourne Australia
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| Posted: Tue Mar 18, 2008 8:52 pm Post subject: |
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No, my friend's XG has retro tubes fitted (I forgot to take a picture of the tube numbers), and the electron guns are identical to the LJE07. There is no mod needed in an XG. Therefore the 07 mod to fit in a G70 will be applicable.
I do not know if the side mounted HV lead will cause an issue in a G70, I don't have a G70. You'll have to look for yourself.
Ahh, I didn't know Curt had documented that info!! I thought it would be buried in the AVS archives.
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