[PSUBS-MAILIST] Helle Communication equipment

[via Personal_Submersibles]

No bet. We used them for years. 27 kHz all. They were cheap and as reliable as a CB radio, which we also used in the early days. Not much range, relatively speaking, for either of them. But we sure got a lot of work done, anyway. Enjoy your beer.
Vance




-----Original Message-----
From: Brian Hughes via Personal_Submersibles <personal_submersibles at psubs.org>
To: personal_submersibles <personal_submersibles at psubs.org>
Sent: Thu, May 25, 2017 7:40 am
Subject: [PSUBS-MAILIST] Helle Communication equipment



Someone on eBay keeps trying to sell Helle equipment of various types. Most are for hard wiring, but several show up without microphone or transducer,, but clearly designed for thu water com. Just because I'm curious I went looking about for information, but no web search seems to find any. Would be interesting to know the power and frequency. Given the vintage, I'd bet a cold beer it's in the 27 kHz range.



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