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Old 1st March 2006, 05:47 PM   #11
Bazukaz is offline Bazukaz  Lithuania
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Simple math:
If the input voltage is 100V , output Z = 4 ohms , P = 60W.
So, Vout=60/4=15 volts.

Turns ratio is 100/15 = 6.6
Not so good.

if P is lower , output V is lower too , and turns ratio is higher.

Search for old tube amp trannie , if you can get it.

For now i am building a headphone direct drive amp , maybe it will be able to drive small ESLs in low volumes - i will try if i succeed... a prototype works at 100V Rms output , but final project is targted to 400VRms.

Regards,
Lukas
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Old 1st March 2006, 09:42 PM   #12
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Quote:
Originally posted by Bazukaz
Simple math:
If the input voltage is 100V , output Z = 4 ohms , P = 60W.
So, Vout=60/4=15 volts.

Turns ratio is 100/15 = 6.6
Not so good.

if P is lower , output V is lower too , and turns ratio is higher.

Search for old tube amp trannie , if you can get it.

For now i am building a headphone direct drive amp , maybe it will be able to drive small ESLs in low volumes - i will try if i succeed... a prototype works at 100V Rms output , but final project is targted to 400VRms.

Regards,
Lukas
There is something wrong with your math, 60 watts into 4 ohms is (60*4)^0.5 = 15.5 volts, very close in this case but this is the right calculation.
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Old 2nd March 2006, 02:50 PM   #13
Bazukaz is offline Bazukaz  Lithuania
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I agree.In my calculation , i get 15 V*A*Ohm units... Strange why the result is so close . Actually , the formula is P = U^2 / R
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