Two output Trannies in parallel?

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eniam rognab
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Re: Two output Trannies in parallel?

Post by eniam rognab »

my family did alot of road trips growing up, DAYS spent in the car....

i think we had some bad experience traveling through missouri, (i was too young to remember details) but its sort of a family joke. im sure its a great place and the pics of your place i have seen look really nice. i just always goad people with this when in find out they are from missouri :lol: :lol:

looks like firestorm and rock-mumbles have given you (and me) some good info, im just laid up and bored and feel like joking around.... i'll take it somewhere else, sorry
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cbass
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Re: Two output Trannies in parallel?

Post by cbass »

I can tell you this Anything to do with St. Louis or KC or Columbia or the boothell is a totally different world than from here.I would reccomend avoiding the boothell.
Its paradise here http://livability.com/top-10/top-10-bes ... -plains/mo just dont tell noone fuckin yankees and californites are tryin to take over. :P
eniam rognab
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Re: Two output Trannies in parallel?

Post by eniam rognab »

is that your hometown? if so, it sounds like it has great people. i consider myself fairly well traveled, but i dont recall much of missouri. if i see a job i qualify for there, ill be checking it out!

classmate of mine is in hawaii on a two 1/2 month "interview" before they decide full time employment, so peeps with my degrees may HAVE to move for work, and unless my part-time technician job starts paying more or more hours, ill be moving too... cant afford this damn california, but if can walk into a store and buy weed so theres that....
eniam rognab
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Re: Two output Trannies in parallel?

Post by eniam rognab »

i did this to your thread, im sorry :oops:
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cbass
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Re: Two output Trannies in parallel?

Post by cbass »

Yea sure like we need a Yankee born Californian :wink:
Sure If you kind find a job here.There's several big factories here one of em builds equipment for the military (patriot missles were wired here) Most industry here is timber related,.THe thing is if you can make $50,000 a year here you can afford a very ,very nice home.
Mnt. Home bout an hour away is also nice and little more progressed than hereSpringfield is the biggest town around bout 200,000 Low crime and lots of jobs.Most anyplace in South MO or north AR is avery nice place to live Except for the eastern side by the Mississippi
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Leo_Gnardo
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Re: Two output Trannies in parallel?

Post by Leo_Gnardo »

eniam rognab wrote:i did this to your thread, im sorry :oops:


Uh-oh, that looks like the Metro-North crash at Spuyten Duyvil last Dec 1. Friend of mine got killed dead on that one. Driver Rockefeller was going 80+ mph in a 35 zone. Not that I blame him, I've been on that line a lot and it seems ALL the drivers think they have to whiz into that last turn. Not any more...

How's about a nice old-fashioned wreck, where all it takes is a little Simoniz and elbow grease to put everything back to working condition. Some soundtrack would be good, "Two Trains Running" Little Feat version, please. This is more like what happens when you parallel 2 OT's, if you don't get the phase of the secondaries right before you splice them together.
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down technical blind alleys . . .
eniam rognab
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Re: Two output Trannies in parallel?

Post by eniam rognab »

:shock: dang leo, sorry to hear that, i just searched for train crash images, no context.... yours is MUCH better by the way, more accurately describes my actions :lol:
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cbass
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Re: Two output Trannies in parallel?

Post by cbass »

So can anyone tell me why I shouldn't do it? I guess the reduced resistance between the primary windings would make the output tubes to run hotter.
I'll be running 6v6,s fixed bias around 350 plate volts 8k primary
Firestorm
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Re: Two output Trannies in parallel?

Post by Firestorm »

What primary and secondary impedances are you trying to wind up with? If you parallel 8K primaries and parallel 8 ohm secondaries, you get 4K primaries into 4 ohm secondaries, which is the same as 8K into 8R. But you absolutely need to know which end of each winding is which.
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JazzGuitarGimp
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Re: Two output Trannies in parallel?

Post by JazzGuitarGimp »

If I recall correctly, there was a Marshall amp that had two paralleled OT's. If you have a signal generator and a dual trace scope, you can determine the phase relationship between primary and secondary on the two OT's.
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cbass
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Re: Two output Trannies in parallel?

Post by cbass »

Hmm they are identical ot's I hope the phase his the same

I'm fix in to attempt to measure them so I would connect all the same color wires together apply ac voltage across the primaries and them measure the voltage on the secondaries then calculate the turns ratio?
Firestorm
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Re: Two output Trannies in parallel?

Post by Firestorm »

I'd calculate the turns ratio on each transformer first. Then connect them together parallel-parallel. If you get it right, the paralleled ones should read the same.
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cbass
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Re: Two output Trannies in parallel?

Post by cbass »

Yes I have measured them they are close to 8k 4 and8 ohm
They came out of a working amp so I am positive on the wiring
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cbass
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Re: Two output Trannies in parallel?

Post by cbass »

Just measured the turns on them wired in parallel .came out close to 8k on the 4 and 8 ohm taps
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rp
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Re: Two output Trannies in parallel?

Post by rp »

Leo_Gnardo wrote:Brown Deeluxe hm? Verrry nice indeed and just a pinch away from the Marshall 18W amps. Should be a winner!
Better than 18W. 4X EL84 full bodied, great, 2X EL84 fun, nice, ultimately anemic & meh, 2X 6V6s full bodied, great. I'm thinking 2 OTs as they might not be exactly matching, might add some interesting color, like running unmatched tubes.

Another out of his mind train engineer:

https://www.youtube.com/watch?v=7-ZtCFqf7UI
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