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Locked Question about article "The Forgotten Use of Saturable- Core Inductors (Transductors)" by Chris Trask
Attention: Chris Trask, N7ZWY / WDX3HLBHello,I am interested in preamps with saturable-reactor (transducer). In his article "The Forgotten Use of Saturable-Core Inductors (Transducers)", a practical example is shown in Figure 7 as "Remotely-tuned active antenna transducer application". Is it possible to get the schematic of this circuit? Regards, Fernando Martin |
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I too would like the schematic. Fred - N4CLA On Fri, Sep 23, 2022 at 11:09 AM Fernando Martin <martin.iranzo.61@...> wrote:
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Let me see if I can find it. ? Chris ? When the going gets weird, the weird turn pro - Hunter S. Thompson -----Original Message-----
From: <[email protected]> Sent: Sep 23, 2022 9:32 AM To: <[email protected]> Subject: Re: [loopantennas] Question about article "The Forgotten Use of Saturable- Core Inductors (Transductors)" by Chris Trask ? I too would like the schematic.
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Fred - N4CLA
On Fri, Sep 23, 2022 at 11:09 AM Fernando Martin <martin.iranzo.61@...> wrote:
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I spent a few hours yesterday looking for any documentation about that design, and all I could find was some OrCAD files. Couldn't even find the board itself. It was one of those designs I was pursuing in the design of active antennas. It was probably shoved in a box somewhere and forgotten. It will probably turn up some day when I'm looking for something else. ? Chris ? When the going gets weird, the weird turn pro - Hunter S. Thompson -----Original Message-----
From: <[email protected]> Sent: Sep 23, 2022 8:09 AM To: <[email protected]> Subject: [loopantennas] Question about article "The Forgotten Use of Saturable- Core Inductors (Transductors)" by Chris Trask ? Attention: Chris Trask, N7ZWY / WDX3HLBHello,I am interested in preamps with saturable-reactor (transducer). In his article "The Forgotten Use of Saturable-Core Inductors (Transducers)", a practical example is shown in Figure 7 as "Remotely-tuned active antenna transducer application". Is it possible to get the schematic of this circuit? Regards, Fernando Martin ? |
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On Sun, Sep 25, 2022 at 02:34 PM, Chris Trask - N7ZWY/WDX3HLB wrote:
I spent a few hours yesterday looking for any documentation about that design, and all I could find was some OrCAD files. Couldn't even find the board itself. It was one of those designs I was pursuing in the design of active antennas. It was probably shoved in a box somewhere and forgotten. It will probably turn up some day when I'm looking for something else.I did find some of your notes relating to using a Trasnductor as an attenuator, so I assume the biasing and construction of the DC coil used in the active antenna would be similar. Other of Chris's notes are still archived on the Wayback machine Unfortunately the on-line archive of Applied Microwaves and Wireless article "The Forgotten Use of Saturable-Core Inductors (Transductors)," Sep/Oct 1997, pp. 76-82. seems to have been deleted, but at least you now all know what keywords to search for. Regards, Martin |
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I found the article in Google patents. Unfortunately some of the figures are missing for some reason.? Regards, Ilkka Laurikainen pe 23. syysk. 2022 klo 18.09 Fernando Martin (martin.iranzo.61@...) kirjoitti:
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Try this link.?? Fred - N4CLA On Mon, Sep 26, 2022 at 7:59 AM <ilkkalaurikainen@...> wrote:
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The article compares the distortion of a saturable inductor with
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a single varactor. This is the proverbial "straw man" comparison, since anyone who cares about distortion uses a pair of varactors in series/opposed. Surely Chris knows this. Also, there is no discussion about the Q of the transductor. Rick N6RK On 9/26/2022 4:58 AM, ilkkalaurikainen@... wrote:
I found the article in Google patents. Unfortunately some of the figures are missing for some reason. <> |
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