Re: Crystal detector?


Robin Szemeti - G1YFG
 

I've seen the Marconi, the advantage of the HP device is that it is self contained battery powered, which is useful when messing around out in fields.


On Sun, 16 Jan 2022 at 08:11, Graham G3VKV via groups.io <g3vkv=btinternet.com@groups.io> wrote:
Hi Robin,
There is a Marconi version - the 6593a - very similar to the HP

  Graham G3VKV


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Robin Szemeti - G1YFG

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