09-15-2020, 06:24 PM
Most times this would be sufficent:
Determine if SE or PP transformer is needed.
From the datasheet of the tube determine the expected impedance the tube wants to see in the amplifier class you have (SE which is A, or PP which is AB). They are listed in datasheets explicitly.
Find the transformer that says explicitly that it is, say, an SE transformer with the output, say, 8 Ohm (suppose you have 8 ohm speaker) and the matching input impedance. If the latter not listed, the square of the Primary to Secondary turns ratio is the conversion factor.
If you have 30:1 ratio of Prim/Sec your 8 Ohms will be converted into 8*900=7,200 Ohm.
And so forth,
Determine if SE or PP transformer is needed.
From the datasheet of the tube determine the expected impedance the tube wants to see in the amplifier class you have (SE which is A, or PP which is AB). They are listed in datasheets explicitly.
Find the transformer that says explicitly that it is, say, an SE transformer with the output, say, 8 Ohm (suppose you have 8 ohm speaker) and the matching input impedance. If the latter not listed, the square of the Primary to Secondary turns ratio is the conversion factor.
If you have 30:1 ratio of Prim/Sec your 8 Ohms will be converted into 8*900=7,200 Ohm.
And so forth,
People who do not drink, do not smoke, do not eat red meat will one day feel really stupid lying there and dying from nothing.
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