By moving the slug, I was able to match the dial to about where I knew my local stations were and was able to hear the Mexican station near the top of the dial. To match the dial with the AM band, I took a thin wooden stick and gently pushed on the ferrite slug in the coil form until it was nearly centered between the two sets of coils. At the very top of the AM dial (around 1600) I know there is a very strong Mexican station, but I couldn't go high enough to tune it in. When I finished soldering everything in correctly, I connected the little set to my antenna & ground and soon I could clearly hear my local AM stations, but I noticed that the tuning dial seemed to be way off. A powdered iron (ferrite) slug is inside the tube between the two coils. The antenna coil is to the left of center. The antenna and the station tuning coils are wound on the phenolic tube. Back side showing the radio's components. By the way, Heathkit called the tuning capacitor connected to the station tuning coil the 'detector tuner' and on the panel it is labeled as 'DET' for detector. I then soldered the station tuning coil side to its variable capacitor and from the tap on the station tuner coil, I soldered a 1N34 germanium detector diode to the phone jack. Next I soldered the antenna tuner coil to its variable capacitor and wired the two fixed capacitors to the selector switch. I took off the grounded binding post and put a screw to cover the hole. The first thing I did was put a sub-miniature phone jack in place of the missing binder post since my piezo earphone has a sub-miniature plug on it and besides, I didn't have a matching binding post to replace the missing one. About a year ago I came across the little radio and decided that I would figure out how it was supposed to work and then I'd put it together correctly. My CR-1 crystal radio modified for two earphone jacks. To tell the truth, I didn't know how the radio was supposed to be wired and I must not have been very interested in getting it working, so it sat in a cabinet for several years until a year or so ago. I remember that some of the screws and a connection post was missing and the parts weren't soldered in properly or correctly. I seem to recall that I picked it up cheap at a thrift store as a non-functional item that had been poorly or incompletely put together.
#Heathkit cr 1 crystal radio manual#
Even though I kept some of the parts, I decided one day to buy another Futura and found one on.Heathkit Cr 1 Crystal Radio Manual DownloadIf you found this page while looking for a simple, but great performing little radio that you can build yourself, you might be more interested in reading aboutAn Armstrong 'Crystal' Radio I can not really remember when or how I came by this little radio, but it was many years ago. One day, someone borrowed the Futura and broke the case. Your story about the Heathkit CR-1 reminded me of the Futura 3 Transistor radio I got for Christmas that I used to listen to the Los Angeles Dodgers baseball games at night, using the earphone. It began when I ran across an interesting description of Heathkit’s legendary CR-1, a double-tuned good performer and very much sought-after by collectors as well as by users. A very selective and high performance crystal radio My Heathkit model CR-1Heathkit Cr 1 Crystal Radio Manual DownloadCrystal Radio Toronto CanadaA comprehensive story containing historical, educational, technical and biographical elements & opinions byJohn FuhringThe Enigmatic Heathkit CR-1 Crystal Radio For the past several months my interest in ‘DX-crystal radio’ construction has been percolating once again.
0 kommentar(er)
