tag:blogger.com,1999:blog-7590176649168185428.post3584574366897252132..comments2024-03-27T17:14:31.032-04:00Comments on SolderSmoke Daily News: Bike RadioBill Mearahttp://www.blogger.com/profile/07662500663603350847noreply@blogger.comBlogger6125tag:blogger.com,1999:blog-7590176649168185428.post-18231765011797699242011-08-15T04:47:29.185-04:002011-08-15T04:47:29.185-04:00Hi Bill.
As Steve says the usual line-up comprise...Hi Bill.<br /><br />As Steve says the usual line-up comprised 6 transistors and a diode. There appears to be only 3 transistors in the bike radio so you're starting from an unusual arrangement. A ferrite rod antenna is a directional device which may add difficulties even if rewound which I wouldn't recommend.<br /><br />'Christmas tree' the radio for parts like the case, speaker, etc. and start from scratch. It would make and interesting project to design a front end with a telescopic antenna from a standard BCB road kill receiver.<br /><br />As you always say, if you can get a receiver working, the transmitter should be relatively easy.<br /><br />73 David M0VTGAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-7590176649168185428.post-16621248315189908022011-08-15T01:02:00.643-04:002011-08-15T01:02:00.643-04:00You could add down converter build out of a ne602 ...You could add down converter build out of a ne602 and add a 455kc oscillator for bfo, BUT it would be much easier to just build a direct conversion receiver using a '602 and LM386 audio amp. You would probably want to use an external oscillator for LO, or a xtal and cap for minor adjustment.WA6ARAhttps://www.blogger.com/profile/03742658789253617646noreply@blogger.comtag:blogger.com,1999:blog-7590176649168185428.post-85902470138644791402011-08-14T23:10:54.525-04:002011-08-14T23:10:54.525-04:00Typically they use a combination LO/mixer, an I.F....Typically they use a combination LO/mixer, an I.F. amp, a diode det., an audio pre-amp. and a 2-transistor audio p.a., push-pull and transformer coupled. Sometimes the detector audio is pumped back through the mixer in a reflex arrangement to get a bit more audio 'oomph'.<br /><br />Using that thing as-is would be a challenge and probably a silk purse/sow's ear situation but what the heck, nothing ventured, nothing gained. I say take a whack at it.<br /><br />To get away from BCB 'ingress' and use the radio as a 'back-end' for a xtal-controlled converter, you could raise the frequency up to some lesser used frequency band. You may need to either ditch the ferrite rod antenna (which would require winding a new antenna transformer) or completely shield the rod. However, ditching the rod antenna opens up another can of worms.<br /><br />FWIW, I grab any road-kill A.M. portable I find. They're a good source of parts for experiments and for the "Impoverished Radio Experimenter" <br /><br />http://www.lindsaybks.com/bks3/exp1/index.html<br /><br />From the former home of "Sears By The Sea" (there's quite a story behind that one),<br /><br />73.......Steve Smith WB6TNL<br />"Snort Rosin"Steve "Snort Rosin" Smith WB6TNLhttps://www.blogger.com/profile/01570621886789949035noreply@blogger.comtag:blogger.com,1999:blog-7590176649168185428.post-55822221520459567142011-08-14T22:07:23.734-04:002011-08-14T22:07:23.734-04:00That thing is too new-fangled. You need something ...That thing is too new-fangled. You need something older:<br />http://davidszondy.com/future/fashion/radiohat.htm<br /><br />Watch out for the B+ !<br /><br />Bill N5ABAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-7590176649168185428.post-27896192498253335982011-08-14T14:58:30.739-04:002011-08-14T14:58:30.739-04:00I don't know Bill, this really ups on to the n...I don't know Bill, this really ups on to the next level of geekness. Be careful that you don't end up like those folks walking down the street with an radio in their hands or even worse headphones with build inn radio and antenna sticking up.....<br />Good for you to enjoy the bike ride dough!Rogierhttps://www.blogger.com/profile/11355222106470607835noreply@blogger.comtag:blogger.com,1999:blog-7590176649168185428.post-10302174187618906432011-08-14T11:26:16.535-04:002011-08-14T11:26:16.535-04:00Good for you Bill for riding to work and taking ad...Good for you Bill for riding to work and taking advantage of nearby rail-trail systems. It's a 12 mile ride on the road to get to my nearest rail-trail. <br /><br />Wow your bike has worked as much DX as I have. Hi!<br /><br />Great blog and podcast. I have been following with interest.<br /><br />73<br />Mike KD8JHJrecumbent conspiracy theoristhttps://www.blogger.com/profile/06534820082655384780noreply@blogger.com