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I have been looking like a madman trying to get my hands on a 1:10 step-up transformer (input 12V@1A square pulsed DC) which is capable to deal with frequencies from 1kHz -50kHz (if possible without or minimal distortions of the signal).
Questions: Is it doable? If so, can I purchase a complete device from somewhere - if not, what material do I have to use for the core/magnet wire and what aspects do I have to take into consideration when building one myself.
Any suggestions/help would be greatly appreciated.
Registered Member #3989
Joined: Thu Jul 07 2011, 05:10PM
Location: In a van down by the river.
Posts: 52
PeterJP wrote ...
I have been looking like a madman trying to get my hands on a 1:10 step-up transformer (input 12V@1A square pulsed DC) which is capable to deal with frequencies from 1kHz -50kHz (if possible without or minimal distortions of the signal).
Questions: Is it doable? If so, can I purchase a complete device from somewhere - if not, what material do I have to use for the core/magnet wire and what aspects do I have to take into consideration when building one myself.
Any suggestions/help would be greatly appreciated.
you could try a low voltage landscape lighting transformer hooked up backwards, they are 10:1 and not rectfied. I have no idea if it would work at 50 kilohertz
you put the amount of volts you want to be able to get out on the plate and the pulsed dc on the screen grid modulates the current which is converted to voltage becouse of the varying voltage drop the resistor causes, but as I am just learning I maybe am not explaning it right
you may also just ground the grid and drive the cathode with your pulsed dc and take the output from the plate before the resistor I believe, as it works better with high frequencies because there is no miller capacitance effect in this configuration, the tube takes more signal to drive this way but since you have 1amp of driving current you said that would be plenty I would think, sorry if I sound confusing
Registered Member #162
Joined: Mon Feb 13 2006, 10:25AM
Location: United Kingdom
Posts: 3140
For 50 kHz ferrite is a good core material for a transformer you want minimal leakage inductance/flux/airgap a large (core area) x (number of turns) is required at low frequency a low (number of secondary turns) is required at high frequency. The primary wire should be about 1mm o.d. and the secondary wire would be 0.315mm o.d. 12V:120V is low voltage, no special insulation requirements. The main challenge here is 12V, 1A @ 1kHz with minimal distortion which requires quite a large core, about ETD49 size.
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I need a little help with something real simple (not sure if it is simple thou)
