Re: LF: A transductor for power regulation?

[DK7FC <selberdenken@posteo.de>]

Thanks for all the interesting contributions. The old book is a very nice one :-)

I expect using saturated coils rather than a saturated transformer can give better results when it is used for keying a carrier (CW, DFCW, QRSS, OPERA...). But that will be rather a narrow band solution. The transformer has its advantages too. I will continue to improve the ratio between keyed and unkeyed power later...

73, Stefan


Am 20.04.2017 09:34, schrieb gw8glo@aol.co.uk:

I used a much smaller circuit but identical as an input attenuator for an experimental vlf transceiver and it worked very well. The control was obtained from the agc line. Definitely worth pursuing!1
73 Dave

-----Original Message-----
From: Claudio Pozzi <smtp01@email.it>
To: rsgb_lf_group <rsgb_lf_group@blacksheep.org>
Sent: Wed, 19 Apr 2017 18:46
Subject: Re: LF: A transductor for power regulation?

On Wednesday 19 April 2017 14:41:35 you wrote:

 

SNIP

 

>

> What about the circuit from my attachment? The windings labeled with DC

> and switched anti-series, so that the AC voltage componsates. The AC

> output winding is switched in series, so that the voltage doubles. When

> the two other legs are saturated there is still a magnetic conductive

> leg in the center, like a rod. This could still provide enough L for the

> primary coil. The DC H fields compensate in the center leg. Could work,

> right?

 

Your circuit is a magnetic amplifier.

 

This book is useful.

 

https://archive.org/details/MagneticAmplifiers

 

73

 

Claudio ik2pii