16-12-2016, 04:30 PM
(This post was last modified: 16-12-2016, 04:42 PM by Miguel Lopez.)
Nowhere-Man Wrote:In Miguel's case (Cuba), radios were supplied in the early sixties so I guess they are plentiful in Cuba.
I wasn't aware that you were talking about Soviet radios here, sorry. Have to say that I have never seen an Astrad in Cuba. We have plenty of VEF-202, 204, 206, 221 and 260; Selena B210, B211, B212, B215 and B216, Sokol, Meridian, some VEF Spidola, and then the Cuban copies:
Siboney (Spidola 230)
Ritmo (VEF-221)
Taíno-74 (Orbita-2)
Juvenil-80 (Radiotehnika-625)
Nocturno (Abava 8330)
Pionero (Selga XXX?)
But as I said, I have never seen an Astrad. This doesn't mean that there isn't.
Nowhere Man Wrote:Miguel, as we know, is a specialist in Soviet radio tech repair so he will know all the irregularities of the design
Not really, I'm just a hobbyist.
I always work on the following direction: A radio has two sections: audio and RF. Connect the oscilloscope at the audio output of the RF section and move the dial. If there is an audio signal there, then it is the audio amplifier, if not, it is the RF section; then focus your effort on the faulty section.
Other way, remove the speaker and connect a similar resistance resistor there and connect the oscilloscope across this resistor; then apply a 1kHz signal to the input of the audio amplifier, and see if that signal appears at the forementioned resistor. That will tell you if the audio amplifier is faulty and focus your effort there.
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PS: @MODS, please replace the "n" by an "m" in the title of this thread. I really feel ashamed for that typing mistake
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