Dunno if I need to post hear at loudspeakers or tubes or both...
Anyway..can anyone tell me how I am doing?
Cheers,
Bas
http://home.zonnet.nl/horneman/eslamp.htm
Anyway..can anyone tell me how I am doing?
Cheers,
Bas
http://home.zonnet.nl/horneman/eslamp.htm
Hi Bas,
How would you maintain a constant plate loading?
I think you would need some kind of impedance compensation network.
Or maybe it`s not so importent?
There is another issue of high freq ringing that needs to be delt with,How do you plan to control the ringing?
How would you maintain a constant plate loading?
I think you would need some kind of impedance compensation network.
Or maybe it`s not so importent?
There is another issue of high freq ringing that needs to be delt with,How do you plan to control the ringing?
Bas Horneman said:
Hi Bas ,
Looks ok !
Just a few points of note :
Coupling caps may be too large (0.22uF will run full-range)
6EW7 may not have enough 'clout' to drive your panels loud enough
Hope this helps
316a
Hi FB,
Yes, I thing you are right...what were you going to use again?
EL36 or something?
I doubt the transformer as well by the way...
Cheers,
Bas
Yep, changed that to 0,056uF allready.
Yes, I thing you are right...what were you going to use again?
EL36 or something?
I doubt the transformer as well by the way...
Cheers,
Bas
More ESL stuff
Hi Bas ,
You could probably use an even smaller value for the couplers . Low value 1% toleranced Vishay polyprops are available very cheaply , the smaller the cap , the better if you ask me ! If using a low value , you could always just use the couplers as a simple 1st order crossover within the amplifier instead of an external one . The valves I was intending on using were EL38's , but these were for direct drive running at 480V as triodes . (EL38 have mu of 16 and Ra of 1.9k as triodes) However for step-up usage I would recommend a low Ra device such as 5998a , 6528 or triode strapped 12E1 , EL34 etc or better still a 2A3 . Mind you though , the 6EW7 would make an excellent starting point to build from ! Maybe not ear-splittingly-loud but there should be enough to get a working setup !
316a
Bas Horneman said:
Hi Bas ,
You could probably use an even smaller value for the couplers . Low value 1% toleranced Vishay polyprops are available very cheaply , the smaller the cap , the better if you ask me ! If using a low value , you could always just use the couplers as a simple 1st order crossover within the amplifier instead of an external one . The valves I was intending on using were EL38's , but these were for direct drive running at 480V as triodes . (EL38 have mu of 16 and Ra of 1.9k as triodes) However for step-up usage I would recommend a low Ra device such as 5998a , 6528 or triode strapped 12E1 , EL34 etc or better still a 2A3 . Mind you though , the 6EW7 would make an excellent starting point to build from ! Maybe not ear-splittingly-loud but there should be enough to get a working setup !
316a
Excellent idea!
Yep, was thinking that too...like you said..the 6ew7 might be a good starting point..
Hi Ben,
What do you mean?
Cheers,
Bas
Bas,
ESL panels are capacitive load and this couses peaking in the freq response,which on all ESL`s is being controlled with a serias resistor to the primery coil.
Do you have an idea for the tuning resistor position in your case?
It`s a fine expriment,let us know if there`s a solution for that problem.
BenY.
ESL panels are capacitive load and this couses peaking in the freq response,which on all ESL`s is being controlled with a serias resistor to the primery coil.
Do you have an idea for the tuning resistor position in your case?
It`s a fine expriment,let us know if there`s a solution for that problem.
BenY.
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