[ARC5] Synchronous vibrator electronic mod, antenna toroid, speaker matching

[Tim]

Thanks for passing that link on Neil...Dr Holden has done some nice work,
both in DC-DC converter analysis, design and in fabrication.  I'll be
studying it in detail...
Thanks! Tim
N6CC


On Fri, Apr 4, 2014 at 4:52 PM, AKLDGUY . <neilb0627 at gmail.com> wrote:

> The question of which WW2 radios were transceivers came up on another
> thread, so I took a look at the New Zealand made ZC1 radio to see whether
> it was a transceiver or not (although I live in NZ, I've never had any
> experience with the ZC1).
>
> While googling, I found the following article:
>
> http://www.worldphaco.com/uploads/ZC1_MK2_POWER_SUPPLIES.pdf
>
> The article is primarily a report on the author's successful use of solid
> state devices to construct a unit that plugs into the ZC1 vibrator socket
> and fulfills the function of the vibrator.
>
> Also demonstrated are the construction of a 12:50 ohm toroid for feeding
> the low impedance of the ZC1 into a conventional 50 ohm antenna, and the
> construction of an auto-transformer to step down the ZC1 audio output to 8,
> 16, or 32 ohms.
>
> The article is complete with excellent photos and detailed analysis and is
> highly recommended. Everyone will learn something from it.
>
> 73 de Neil ZL1ANM
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