Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.2 9/18/84; site rtp47.UUCP Path: utzoo!linus!decvax!mcnc!rti-sel!rtp47!throopw From: throopw@rtp47.UUCP (Wayne Throop) Newsgroups: net.physics Subject: Advertisement claims Message-ID: <68@rtp47.UUCP> Date: Fri, 14-Jun-85 15:21:44 EDT Article-I.D.: rtp47.68 Posted: Fri Jun 14 15:21:44 1985 Date-Received: Tue, 18-Jun-85 02:30:57 EDT References: <265@sri-arpa.ARPA> Organization: Data General, RTP, NC Lines: 16 > From: William Spears > I have just recently come across an interesting advertisement > for a radio that runs on muscle power alone - just turn the crank > 10 times and the radio (and encased flashlight!) will run for an > hour and a half. [omitted calculation of energy available from hand crank] > My question: How does his radio function for 1.5 hours? Can I assume > a .1 Watt radio? Yes. Since crystal radios draw zero power, it seems clear that a radio can operate on quite modest power levels. I have no way of knowing for sure, but I suspect that the radio in this case is essentially a cheap crystal set, and would be of quite low quality. I'm not sure about the flashlight claim, but imagine it to be quite dim. -- Wayne Throop at Data General, RTP, NC !mcnc!rti-sel!rtp47!throopw