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Old 30th October 2006, 04:07 AM   #521
BGcap is offline BGcap  United States
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LuckyLyndy

If, as Zen Mod believes, it turns out your tranny runs too hot then it might help to build the cathode CCS's to regulate at reduced current.

Someone (Brian Beck, I think) suggested that changing the value of the resister in the CCS to lower the current draw of each tube to about 22ma would have negligible affect on the sound.

This would take the total current draw from 120ma down to about 104ma.

22ma for each 12b4 + 30ma for each OD3 stack = 104ma

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Old 30th October 2006, 05:59 AM   #522
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Thanks, BG, for the idea and suggestion.
I'll look into it. After reading Cho...er, Zen Mod's comments, I was just ready to chuck that part of the project and just stick with the excellent solid state regulated board I bought from Germany. Foolish me of thinking of having two paths on this linestage.

Just watched an old Johnny Depp movie, "The Ninth Gate". The movie is so-so, but the soundtrack...
A beautiful voice emerges from soprano Sumijo, blending well with - The City of Prague Philharmonic & Chorus, conducted by Stepan Konicek.
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Old 30th October 2006, 08:25 AM   #523
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Quote:
Originally posted by LuckyLyndy
Thanks, BG, for the idea and suggestion.
I'll look into it. After reading Cho...er, Zen Mod's comments, I was just ready to chuck that part of the project and just stick with the excellent solid state regulated board I bought from Germany. Foolish me of thinking of having two paths on this linestage.

Just watched an old Johnny Depp movie, "The Ninth Gate". The movie is so-so, but the soundtrack...
A beautiful voice emerges from soprano Sumijo, blending well with - The City of Prague Philharmonic & Chorus, conducted by Stepan Konicek.

in your boots-I'll try my luck with that xformer and gas stabz;

you're Lucky , don't you?


besides, I corrected somewhat my comments in PM to you...?
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Old 3rd November 2006, 09:55 AM   #524
Zen Mod is offline Zen Mod  Serbia
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Pinging Lucky....

my mails to you bounced....

I forwarded mail for ya to Mark...........
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Old 3rd November 2006, 02:57 PM   #525
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I just forworded them to him... Thanks!
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Old 3rd November 2006, 07:16 PM   #526
Zen Mod is offline Zen Mod  Serbia
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Quote:
Originally posted by Mark A. Gulbrandsen
I just forworded them to him... Thanks!


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Old 5th November 2006, 04:04 PM   #527
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Default Gas tubes regulation/Proper Transformer Specs

I sent a PM to Zen Mod, but I would also like to post here.
I bought a trannie to power up the OD3 gas tubes, but it looks like it doesn't have the juice to do the job properly. With help from Zen Mod and Mark, I have emailed a schematic and power requirements to Edcor Transformers, and got this reply:
Lyndon,
> Sorry I was out part of Friday. I looked at the info
> and am a little
> confused. I understand the schematics and discussion
> but give me a AC
> voltage that you would like to have supplied to your
> solid state bridge.
>
> I will make you a transformer and replace the
> XPWR106 at no charge.
>
> Do you require a 6.3VAC source as the XPWR106.
> Don't forget you can use the
> red to red high voltage winding to get 550 VAC at
> 125ma. Just don't use the
> black/red wire.
> Let me know.
>
> Larry

The transformer I purchased was this one:
http://www.edcorusa.com/classx/power/xpwr/Xpwr106.htm

Anyone with advice for Larry, let me know.
P.S. I am just an avid stereo diy'er, and have no background knowledge in electronics, but it mystifies me that I have asked and asked what should be a simple question for this transformer and have wasted a ton of time on it. Why has it been so hard to get a straight answer on a trannie to meet the requirements for this area of the project?
Larry at Edcor has been more than willing to make whatever we need, so kudos to him and to George (tubelab.com) for trying out the Edcor trannies last year, and reviewing them. Also thanks to Zen Mod for sending a reply this morning, that I have sent to Larry at Edcor. Maybe I will have this up and running before Thanksgiving!
Off topic:
SY, I know you like to cook, so I am letting you know I am making a baked pumpkin dish, a Long Island Cheese Pumpkin with layers of crusty bread, creme fraiche, gruyere cheese, and fresh ground nutmeg. Served with sauteed gnocchi, in olive oil and rosemary, and a garden salad...YUM!
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Old 5th November 2006, 04:31 PM   #528
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Fall is indeed here! Is Ovens of Brittany still around? They were on 7th East.

OK, back on topic.
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Old 6th November 2006, 02:25 AM   #529
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Default Re: Gas tubes regulation/Proper Transformer Specs

Quote:
Originally posted by LuckyLyndy
......................
SY, I know you like to cook, so I am letting you know I am making a baked pumpkin dish, a Long Island Cheese Pumpkin with layers of crusty bread, creme fraiche, gruyere cheese, and fresh ground nutmeg. Served with sauteed gnocchi, in olive oil and rosemary, and a garden salad...YUM!

WTF!
sign me in for next shootout!
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Old 6th November 2006, 03:47 AM   #530
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Default Re: Gas tubes regulation/Proper Transformer Specs

Quote:
Originally posted by LuckyLyndy
I sent a PM to Zen Mod, ...........

you can try with data I sent you in PM,or you can go for http://www.edcorusa.com/classx/power/xpwr/Xpwr107.htm and just use two diodes in full wave rectifier.........and stay with 6V3 AC heating
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