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| To: | [email protected] |
|---|---|
| Subject: | Re: ***CECI EST UN SPAM*** RE: LF: Ferrite RX antennas |
| From: | John Rabson <[email protected]> |
| Date: | Sun, 2 Oct 2011 18:35:31 +0200 |
| In-reply-to: | <[email protected]> |
| References: | <[email protected]> |
| Reply-to: | [email protected] |
| Sender: | [email protected] |
Very cold! The lowest temperature I ever worked with was that of dry ice (about -78C?) 73 John On 2 Oct 2011, at 08:45CEST, <[email protected]> wrote: > Yes , > > hf is used for more things than amateur radio communication.The filters are > used to read out a infrared detector-arrey(freq multiplexing).Workingtemp of > detector,filters and preamp is 50 mK.(detectors and squid preamp don't work > at all at higher temp).Very strange techniques but they do work. > > 73 > > Victor |
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