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#1
April 24th 08, 06:08 PM
posted to rec.radio.amateur.homebrew
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Transmitter Circuit?
I am trying to locate the article for a simple 2 transistor topband AM phone
transmitter from many years ago that I am sure appeared in "Practical Wireless" sometime between 1958 and 1965. If memory serves me correctly, it used two germanium transistors, OC71 and OC44. The OC71 was configured as a microphone amp/modulator and the OC44 as a Hartley oscillator. The oscillator coil was wound on a short piece of ferrite rod. I wonder if anyone can help in any way? |
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#2
May 2nd 08, 05:43 PM
posted to rec.radio.amateur.homebrew
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Transmitter Circuit?
On Apr 24, 6:08 pm, "Theo" wrote:
I am trying to locate the article for a simple 2 transistor topband AM phone transmitter from many years ago that I am sure appeared in "Practical Wireless" sometime between 1958 and 1965. If memory serves me correctly, it used two germanium transistors, OC71 and OC44. The OC71 was configured as a microphone amp/modulator and the OC44 as a Hartley oscillator. The oscillator coil was wound on a short piece of ferrite rod. I wonder if anyone can help in any way? Just found your question whilst searching oc71 on google and this page is just above it on the results: http://www.arar93.dsl.pipex.com/mds9...fradios02.html Is it what you're looking for? Cheers, Tim |
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