[Boatanchors] [nagato@arnet.co Re: Audio drive needed for 813 (x 4) AM modulator

[GGLL]

Chris Howard escribió:
>>Take in care the impedance ratio of your transformer.
> 
> 
> The transformer I have says "Langevin" on it, and that's all.
> It has connections for a balanced audio input.

Form an Internet search, it comes up as a vintage quality brand dedicated to 
audio. It's a pity it has no other markings.
> 
> I'm operating under the assumption that this thing all
> worked correctly at one time.  It seems like 600 ohms
> would be a good assumption.
> 
> So, unless there is a method for determining the impedence,
> I think I will assume 600 ohms and see what happens?

You can try; a way to determine transformer's ratio is by feeding it with a 
low voltage (with the aid of a variac) and measuring other's windings voltage. 
Remember then that impedance transformation ratio is the square of turns 
(voltage) ratio.


Good luck
Guillermo - LU8EYW.