Hi Mike,Thanks very much, this actually makes a little sense. "Feet" should have translated to "pin" (the associated pin of the integrated circuit), and pins 2 and 30 are indeed the AM and FM signal inputs, respectively. The same 4537 audio amp IC is also used in the SRF 59 radio, and pins 2 and 4 are the dual inputs; pins 7 and 9 the dual audio outputs. Unfortunately little to nothing is said about what actually happens inside the main IC and what the local oscillator frequency should be. ----- Original Message ----- From: "Mike Westfall, Lost Almost NM" <mwdx@xxxxxxxxxx> To: "Mailing list for the International Radio Club of America" <irca@xxxxxxxxxxxxxxxx>
Sent: Thursday, December 27, 2007 8:53 PM Subject: Re: [IRCA] Sony SRF-59 Schematic Now Posted Online
Well, here's what Babelfish says: (I'm still confused...) CXAll29N is the new monolithic reception electric circuit which Japan Sony Corporation produces, it integrated the amplitude modulation, frequency modulation stereophonic receiver all functions, and consumes the electricity province, with fifth battery power supply, may use for a month. This IC is 30 feet 双列 flat plastics seal, the volume is very small, the length is 10mm, the width only has 5.smm. The attached figure is CXAll29N assembly AM/the FMSTEREO radio electric circuit schematic diagram, the working voltage is 1.5V, the operating current is 8mA. CXAll29N 2nd, 30 feet respectively are center the wave and the frequency modulation antenna signal input end; The 7th foot is hanging when is the FM receive condition, meets V+ is the AM condition; IC2 (4,537) is the necessary audio frequency amplification electric circuit, its 2, 4 feet respectively be audio frequency about sound track input end; 8th foot earth; 7th, 9 feet are the audio frequency out-ports, may directly impel the low impedance earphone. This machine antijamming ability strong, receiving sensitivity high, when listens to the frequency modulation program, the sound is clear but the background sound to be much more static, its acoustic fidelity approaches the CD level. If can use the upscale earphone to listen to, some large-scale combined sounds also are unable with it comparison. Character string 9 -- Mesa Mike LA de NM
--------------------------------------------------------------------------------
_______________________________________________ IRCA mailing list IRCA@xxxxxxxxxxxxxxxx http://montreal.kotalampi.com/mailman/listinfo/ircaOpinions expressed in messages on this mailing list are those of the original contributors and do not necessarily reflect the opinion of the IRCA, its editors, publishing staff, or officersFor more information: http://www.ircaonline.org To Post a message: irca@xxxxxxxxxxxxxxxx
_______________________________________________ IRCA mailing list IRCA@xxxxxxxxxxxxxxxx http://montreal.kotalampi.com/mailman/listinfo/irca Opinions expressed in messages on this mailing list are those of the original contributors and do not necessarily reflect the opinion of the IRCA, its editors, publishing staff, or officers For more information: http://www.ircaonline.org To Post a message: irca@xxxxxxxxxxxxxxxx