Re: Interstage Transformer Nomenclature

MagneQuest/Peerless Forum

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In Reply to: Interstage Transformer Nomenclature posted by Sidewinder on January 14, 2005 at 11:15:33:

Sidewinder
first
1:1 is the voltage ratio input:output
but the design is a bit confusing on this point
so I researched it on the net and it is
indeed used as a 1:1 transfomer
second
you need to know what impedance
the tube needs to perform well
sometimes they combine the two and say 5K:2.5K
which is the impedance ratio
a 2:1 impedance ratio will equate to a
1:.7 voltage ratio (square root of difference)
6L6 likes ~5K primary impedance
(from data sheets)
third
there is the voltage swing
voltage needs to be below the
saturating point of the core
6L6 has a 20V bias with a gain of 8
so you have a 160Vpk/112Vrms voltage swing
fourth
there is the current going through it
which determines the size of the air gap
so that the DC current doesn't saturate the core
namely 28mA in this case
so what you are looking for is:
a 5K 1:1 transformer that can
handle a 112V signal level
with a current of 28mA
FWIW
DanL

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Topic - Interstage Transformer Nomenclature - Sidewinder 11:15:33 01/14/05 (1)

Re: Interstage Transformer Nomenclature - danlaudionut 13:03:42 01/16/05 (0)

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Re: Interstage Transformer Nomenclature - danlaudionut 13:03:42 01/16/05 (0)

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