From FB group Building Transistor Radios Then there is the loopstick. It is deliberately made long and thin to capture the RF magnetic fields. The frequencies that loopsticks are better at capturing are those that require long antennas that would be impractical. So the AM broadcast band is where loopsticks do their best. The loopstick’s
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From FB group Ferrite Loopstick Antenna Experimenters Some experimenters in another group looked at schematics and saw that some radios with a RF amplifier between the loopstick and the converter used a third section on the variable capacitor to tune the RF amplifier. This is good, but it makes the variable capacitor more expensive and
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FB group Building Transistor Radios In JF1OZL’s voluminous archive I found his version of a MW receiver. It is labeled [2] …. MW-RADIO (see link). He used a long wire antenna, and an IF transformer with the ceramic capacitor removed for the tuning coil. He also said to use a ferrite loopstick, which is what
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For FB group Building Transistor Radios When I started building regen receivers, the first thing I found I needed was a simple signal generator. I have a function generator, but every time I want a different frequency, I had to readjust the controls. So I built a few RF oscillators to put close to the
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I tried to to post this to the FB group Vintage Transistor Radios, but the FB app crashed and I lost several lines of my typing. Makes me angry! The radio was not making any sound. I removed the chassis from the case. I found the ‘battery saver’ slide switch had been forced apart. I
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I was the only bidder on a lot of three radios, one of them is an Olympic model 860 AM transistor radio. This radio uses four AA cells for a total of 6 volts DC. Overall the radio is in good condition – no chips or cracks. I powered it up and if I turned
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From FB group Electronics Hobbyists, regarding the Zenith Royal 500 radios. Clyde Hendrickson There are two 50 uF, 10V electrolytic capacitors under the battery holder. Replace them with 47 uF, 10 or 16 volts. There is also a smaller capacitor next to the other, it might be a 3 uF, or a 16 uF, 10V.
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From FB group Vintage Transistor Radios For the last few months, ever since I started experimenting with oscillators on the AM broadcast band, my attitude towards auxiliary audio inputs has changed. Earlier I thought that it would be convenient to have an aux input. But I was leery of making changes to the collectibles radio
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For FB group Vintage Transistor Radios Speaking of fuzzy garbled audio… I won another auction for a Zenith “Royal 510” which I’d never heard of. It turned out to be a Royal 250. The seller got no bids at all, so with less than a minute left I bid the minimum ten dollars. I got
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From FB group Vintage Transistor Radios I’m flabbergasted. I received the Zenith Royal 755 I won last week – auction link is below. the seller said repair/parts, but I’m amazed at how good a shape it’s in! I suspect that it was in storage for most of its life. The leather case is nearly new,
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