Home |
Search |
Today's Posts |
#18
![]() |
|||
|
|||
![]()
On Sat, 04 Feb 2006 19:12:18 -0800, running dogg wrote:
I know that there are several plans on the internet for building a radio controlled clock. These involve building a fixed frequency rx and then hooking it up to a clock. How feasible would it be to hook the same circuit up to an amp and speaker instead of a clock? I haven't looked at any of these circuits, but I'd expect it to be quire easy to connect and audio amplifier and speaker to the output of the detector. I suspect that the clock radios listen in on 60khz, but it should be simple to insert a crystal or change it to get 10Mhz. Also, you could build a radio with three frequencies-5Mhz, 10Mhz, and 15Mhz in order to take advantage of day vs night propagation. Converting a 60 KHz receiver to 10 MHz is likely impossible - construction techniques and tuned circuits will be quite different - you can almost use audio techniques and iron-core coils at 60 KHz, but are well into RF territory at 10 MHz, and will likely have to use air-core coils in the tuned circuits. -- Peter Bennett, VE7CEI peterbb4 (at) interchange.ubc.ca new newsgroup users info : http://vancouver-webpages.com/nnq GPS and NMEA info: http://vancouver-webpages.com/peter Vancouver Power Squadron: http://vancouver.powersquadron.ca |
Thread Tools | Search this Thread |
Display Modes | |
|
|
![]() |
||||
Thread | Forum | |||
How to measure soil constants at HF | Antenna | |||
FS: HBR-15 Receiver, Hallicrafters, Heathkit, Millen and Other Goodies | Boatanchors | |||
FA - R. L. Drake SW8 'portable' World Band Shortwave Communications Receiver | Shortwave | |||
STATUS : Grundig Satellit 800 Millennium World Band Receiver | Shortwave | |||
a page of motorola 2way 2 way portable and mobile radio history | Policy |