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tromatus
Joined: 19 Nov 2010
Posts: 66
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| Posted: Fri Mar 22, 2013 8:26 am Post subject: BARCO 1209S neckboard mod |
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hi guys,
i going to put a set of p19 lugs
into my 1209s.
some peoples says i must to modify
the necboards
normaly KG grid is connectet to the ground in the 1209s sockets.
but some people says i must tie KG (pin 7) to G1 (pin 5) with
a small wire to get a god focus and reduced noise...
my question:
its realy necessary to make this mod?
someone did that?and if yes that he think about
this mod??
thanke you
manu
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Decibel
Joined: 31 May 2007
Posts: 904
Location: Roma - Italia
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| Posted: Fri Mar 22, 2013 10:51 am Post subject: |
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I am very interested in this topic, you got some link?
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Domenico (Barco fan!)
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tromatus
Joined: 19 Nov 2010
Posts: 66
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Decibel
Joined: 31 May 2007
Posts: 904
Location: Roma - Italia
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| Posted: Fri Mar 22, 2013 11:24 am Post subject: |
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Be careful!!!
Greg in the linked topic said ...
| Geisemann in AVSForum wrote: |
On the 1209 you just add a wire.
On 1209s I had to cut round the pin to isolate the pin from ground with a dremmel and then tie the grids tougher. |
Infact if we simply make a jumper from pin 5 (G1) to pin 7 (KH) in 1209s neckboard we will connect G1 to ground!!!
He repeated the warning in his subsequent post
http://www.avsforum.com/t/1134455/new-green-p19lug-for-barco-1209#post_16188258
| Geisemann in AVSForum wrote: | | PLEASE ON THE 1209S DON'T FORGET TO DREMMEL THE BOARD AROUND THE KG PIN IF NOT IT WILL BE A MASSIVE SHORT G1 TO GROUND. AFTER YOU DREMMEL USE A DROP OF SILICONE OR HOT GLUE TO PREVENT ARCS |
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Domenico (Barco fan!)
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tromatus
Joined: 19 Nov 2010
Posts: 66
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| Posted: Fri Mar 22, 2013 11:35 am Post subject: |
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| Geisemann in AVSForum wrote: | | PLEASE ON THE 1209S DON'T FORGET TO DREMMEL THE BOARD AROUND THE KG PIN IF NOT IT WILL BE A MASSIVE SHORT G1 TO GROUND. AFTER YOU DREMMEL USE A DROP OF SILICONE OR HOT GLUE TO PREVENT ARCS |
[/quote]
yes,yes,we need to dremel around the kg pin.
if not we make a shortcut
int this picture http://www.heberger-image.fr/images/77741_STP83114.jpg.html can you tell
me if in this picture you can tell me if the pins 7 and 5 are correct??
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Decibel
Joined: 31 May 2007
Posts: 904
Location: Roma - Italia
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| Posted: Fri Mar 22, 2013 2:27 pm Post subject: |
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Here the pin 7 and 5
[image removed]
And here the project of modify.
[image removed]
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Domenico (Barco fan!)
Last edited by Decibel on Fri Jul 04, 2014 10:00 am; edited 2 times in total
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tromatus
Joined: 19 Nov 2010
Posts: 66
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| Posted: Fri Mar 22, 2013 4:34 pm Post subject: |
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yes,that like.
but do you think that is there impact on the life of tubes??
I'm afraid there is a negative impact on the tubes'life....
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Decibel
Joined: 31 May 2007
Posts: 904
Location: Roma - Italia
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| Posted: Fri Mar 22, 2013 9:40 pm Post subject: |
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| tromatus wrote: |
but do you think that is there impact on the life of tubes??
I'm afraid there is a negative impact on the tubes'life.... |
I have no idea if the modify would adversely affect tube life.
I do not know anything about this modify 
I just explained the practice what we read in the other forum.
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Domenico (Barco fan!)
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Gerbrand
Joined: 13 May 2008
Posts: 199
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| Posted: Mon Mar 25, 2013 7:27 pm Post subject: |
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I put P19LUGs in my 1209s and did not do anything to the neckboards. It looks great to me (and others...)
Gerbrand
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BG1209s (color filtered,new LUGs!), 13000h
Bat cave
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Decibel
Joined: 31 May 2007
Posts: 904
Location: Roma - Italia
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| Posted: Fri Jul 04, 2014 9:59 am Post subject: |
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| tromatus wrote: | | int this picture |
| tromatus wrote: | | can you tell me if in this picture you can tell me if the pins 7 and 5 are correct?? |
I've removed the my pictures because I noticed that was wrong!
In your picture above (and in my pictures that I've removed) the pin that show "PIN 5" is really pin 9 (filament).
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Domenico (Barco fan!)
Last edited by Decibel on Fri Jul 04, 2014 10:16 am; edited 1 time in total
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Decibel
Joined: 31 May 2007
Posts: 904
Location: Roma - Italia
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| Posted: Fri Jul 04, 2014 10:15 am Post subject: |
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If someone tried to modify his neckboards with these wrong pictures, no worry.
I personally modified my neckboards following wrong pictures, with Lug's tubes, and they works anyway.
With useless filament voltage in pin7 (extra grid in lug's tubes, nothing in others tubes).
Sorry. 
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Domenico (Barco fan!)
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