Try both and find for yourself...it is very important that you try both for first hand experience. Power wise you should not notice any difference.
Regards
Regards
If you know the power transformer nominal wattage and secondary parameters (at least loaded AC voltage and DCR) easier to give advice.
The transformer is the Hammond 372JX, Power 243VA, secondary 600V C.T. @ 288ma, and I havent been able to find DCR
Hello,
3,7 w with 2,6 % Thd is low.
For SE class A, More you are power with acceptable THD, better the sound it is with low power.
The standard design is 7 w with 5 % of THD.
Best design is > 10 w with only 3 % of THD.
One part depend of the driver and second part of the 300 B.
When the driver design use a heavy load for example C3 g 24 k to 30 k, the dynamic line load go down. The result is more swing with less THD.
But when you turn on the amplifier you must have a sequence of PSU'S.
Exemple.
Heat for all tube immediat
Negative voltage of 300 b progressive 15 s
Hight voltage driver progressive 30 s
Hight voltage 300 b progressive 45 s
With this sequence tubes have a long life.
A rule for good stuff is to run the tube to 80 % of plate dissipation.
The standard load of 300 B is between 2,3 k to 3,5 k for good sonic experience.
Eric
3,7 w with 2,6 % Thd is low.
For SE class A, More you are power with acceptable THD, better the sound it is with low power.
The standard design is 7 w with 5 % of THD.
Best design is > 10 w with only 3 % of THD.
One part depend of the driver and second part of the 300 B.
When the driver design use a heavy load for example C3 g 24 k to 30 k, the dynamic line load go down. The result is more swing with less THD.
But when you turn on the amplifier you must have a sequence of PSU'S.
Exemple.
Heat for all tube immediat
Negative voltage of 300 b progressive 15 s
Hight voltage driver progressive 30 s
Hight voltage 300 b progressive 45 s
With this sequence tubes have a long life.
A rule for good stuff is to run the tube to 80 % of plate dissipation.
The standard load of 300 B is between 2,3 k to 3,5 k for good sonic experience.
Eric
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With 5AR4/GZ34 the output rather 350V than 360.
Attachments
You realize that you're compulsing over a difference of 5% or less. Real world things aren't made to those tolerances. It must be the lure of the modeling programs, that lull us into believing their 4 decimal place answers.
YOS,
Chris
If you need only 3 w,
2 E55L in // without driver 1,5 k plate load and 150 V plate voltage and you have 3 W with 3 % THD. It is a sigle stage amplifier, very simple with very nice sound.
2 E55L in // without driver 1,5 k plate load and 150 V plate voltage and you have 3 W with 3 % THD. It is a sigle stage amplifier, very simple with very nice sound.
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