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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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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I got another Zenith Royal 500 at auction, I think it was $20 but the shipping cost a lot. I got it out and tried it out. I found the battery contacts were in good condition. The battery compartment was missing the cover. It came with a leather case, so that will stop the batteries
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From FB comment in group Vintage Transistor Radios I think we like the look of wood because of some primeval instinct from our distant past. Perhaps it has something to do with the trees being protective, under which we could take shelter during rain or shine. Or perhaps those prehistoric people who survived longer
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I was reading this blog, and I’m referring to this schematic. The author calls this regenerative receiver a “minimalist” design, but I refuse to consider a circuit with 7 transistors minimalist. If one thinks of the design as constrained to using a supply voltage of only 1.2 volts, a single AA or AAA rechargeable NiMH
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I ordered these kits Several weeks ago and they finally arrived today. I opened up the package and found several parts rattling around loose in the box. I found one bag had been cut open, and whoever slit it didn’t tape or staple it closed. I got to work and assembled one of the kits
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The previous regenerative receivers I’ve built have been 27 MHz, but they have not been successful, they haven’t received a decent verifiable signal other than the very strong one I made with a dip meter. So this time I would build a regenerative receiver that is much lower frequency, and I chose 10.000 MHz because
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