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Re: LF: Transmitting with a small ferrite antenna

To: [email protected]
Subject: Re: LF: Transmitting with a small ferrite antenna
From: John Rabson <[email protected]>
Date: Wed, 25 Jul 2018 08:02:19 +0200
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Thank you, Roman.

> On 24 Jul 2018, at 21:33, Roman <[email protected]> wrote:
> Hi John!
> VY glad about that info was interested for you!
> Alexander RN3AUS make an experiments with 11 Hz here, but in near zone. Not 
> so long distance.
> This is experiment and joy-toy, but no communication for caves -)
> If I know any news about VLF communication for caves here - I let you to know!
> 73!
> Roman
>> Roman,
>> Many thanks for pointing these out. Some aspects of the French experiment 
>> were also described in CREGJ 89 and 92.
>> FERRA was also mentioned in CREGJ 89.
>> John Hey (SK) would be delighted for his cave radio to be described as 
>> “Professional”. It undoubtedly was of that standard, but was not 
>> manufactured commercially as we could not find a company to do that. Many 
>> people built Heyphones, over a hundred sets were built and approximately 80 
>> were built by John himself.
>> 73 John F5VLF

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