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Author Topic: Power transformer  (Read 8571 times)
jestaudio
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« on: March 22, 2011, 07:26:08 PM »
Heys folks, i,m a newbie about to start my first D type build, got the boards from Nik but using my own trannie, question is how much leeway do i have on voltages, im looking at a Mojo which is about 10v hicher at 355 and 5 v lower on the bias tap
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plasticvonaband
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« Reply #1 on: March 22, 2011, 10:36:16 PM »
I'd stay within spec. The plate voltage is already quite high with the stock PT and from what i gather the Bias voltage is pretty critical to stay in spec.

Gabby sells Mercury Magnetics PT's, OT's, and Chokes which are considered upgrades at fairly reasonable prices

http://www.gabkits.com/transformers/ceriatone

Gregg
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Overdrive is like peanut butter. Some like it crunchy, some like it creamy.
Bluesmaster 50 2x12 combo and some guitars.
MrGoldTop
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« Reply #2 on: March 22, 2011, 11:25:52 PM »
I wouldn't be too concerned. You're talking less than 3% (710/690=1.029). That's like your line voltage going from 118V to 121.5V. You wouldn't notice. By the way Ceriatone's PT's come can with a 50V or 60V bias winding (Check the web site pics). Mine is 50V and works fine.
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sduck
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« Reply #3 on: March 23, 2011, 03:44:33 AM »
Nik is also an authorized mercury dealer - meaning he can sell you the mercury trannies at his dealer price. You send him the money, Mercury send you the trannies directly, which if you're in the US saves a lot on shipping. Don't forget the shipping costs on these things from wherever you end up getting them - they weigh around 25 lbs, which is expensive to ship.
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plasticvonaband
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« Reply #4 on: March 23, 2011, 03:54:52 AM »
good point, sduck. i forgot about that
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Overdrive is like peanut butter. Some like it crunchy, some like it creamy.
Bluesmaster 50 2x12 combo and some guitars.
jestaudio
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« Reply #5 on: March 23, 2011, 07:47:45 PM »
Quote from: sduck on March 23, 2011, 03:44:33 AM
Nik is also an authorized mercury dealer - meaning he can sell you the mercury trannies at his dealer price. You send him the money, Mercury send you the trannies directly, which if you're in the US saves a lot on shipping. Don't forget the shipping costs on these things from wherever you end up getting them - they weigh around 25 lbs, which is expensive to ship.
Already thought of that but shipping to the uk is way expensive
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T Wilcox
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« Reply #6 on: March 23, 2011, 08:06:15 PM »
This site was recommended by McInku on another post. My dumb american ass cant read it though cause I only speaky the english.
http://www.trm-audio.si/
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sduck
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« Reply #7 on: March 23, 2011, 09:50:02 PM »
Quote from: jestaudio on March 23, 2011, 07:47:45 PM
Quote from: sduck on March 23, 2011, 03:44:33 AM
Nik is also an authorized mercury dealer - meaning he can sell you the mercury trannies at his dealer price. You send him the money, Mercury send you the trannies directly, which if you're in the US saves a lot on shipping. Don't forget the shipping costs on these things from wherever you end up getting them - they weigh around 25 lbs, which is expensive to ship.
Already thought of that but shipping to the uk is way expensive

Oh - didn't realize you were over there. Then skip that idea - find something more local!
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mcinku
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« Reply #8 on: March 24, 2011, 01:16:29 PM »
Quote from: T Wilcox on March 23, 2011, 08:06:15 PM
This site was recommended by McInku on another post. My dumb american ass cant read it though cause I only speaky the english.
http://www.trm-audio.si/

Yes these are the trannies I use... unfortunately the site is just in local language.
Here's the direct link to PTs
http://www.trm-audio.si/omr_transf.htm
...the prices are without VAT
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