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How about this one. True Story, this was in a 50's or 60's Popular Electronics magazine. A woman calls a TV repair guy with a problem with their TV, the repairman shows up, fixing the TV (bad tube)

Gary, I am not informed about this stuff ,so I just looked up a bit more, and it seems that there are many variations of circuitry and some use PWM and must be noisy, but yours is simple, with warm

Hello OM`s, I`m doing upgrade Cyclone to Cyclone II. Do You know why the RF voltage from carrier oscillator? in Cyclone II is hgigher? than in Cyclone ? The diagrams are the same ... Wojtek, SP1NQR

Back several years before my day there were issues with the old Edison cage type filament lamps. It was noticed that it was either around channel 3 or 4 the lamps or oscillating and causing

Sorry guys.. another story slightly off topic Back in 1990’s they were removing a tree next to a power line 2 doors away and at the moment in question they had the boom truck bucket and cutter guy

These are a single LED with a current limiting resistor, built into a Bayonet socket: https://www.superbrightleds.com/vehicle-lights/car-boat-light-bulbs/ba9s-ba7s/ba9s-led-bulb-1-led-ba9s-bulb-2 Dale

Don, I build my own. They look so much better than old bulbs and make the radio unbelievably cooler, usually up front by the mechanics and the oscillator, makes it more stable and makes it last

I keep wondering out of ignorance, when we say “LED” do we the just one bare-bones LED device, or do we mean a LED with some power conditioning electronics built-in as well ?,, perhaps using HF

That’s Interesting Mike; now why did it trip?, and what would happen if like most radios, there was no power switch/ breaker? to trip?. I don’t know the RT-524 at all , but we wonder if the

The idea that a “device” is found to be failed due to a short or failed due to an open likely depends highly on ALL the details of it’s guts, and maybe the circuit that it sits in. Jerry points

Yeah I’m a bit worried about this myself I have one on an 8amp 6.3v fil supply to a home brew audio amp would not the dropping resistor blow and protect the transformer ? Come to think of it I have

Ya know.... Come to think of it... I shudda remembered that. Thanks 73 KW1B To: [email protected] Sent: Saturday, October 1, 2022 3:34:17 PM Subject: Re: [HallicraftersRadios] Blue LED

The bayonet LED’s have a built in current limiting resistor- depending on voltage and color, 470 Ohms is a common value. Dale W4OP Sent: Saturday, October 1, 2022 3:20 PM To:

I assume that LED's are much like transistors and other SS devices.? Open transistors almost always started as shorted transistors but the very fine wires that connect the silicon wafers to the leads

Good story.? We all probably had something like that happen at some time.? The correct answer usually comes to light after a long bit of thinking.

As a lifelong electrical engineer working in power generation and distribution, that utility device that tries 3 times to re-energize the lines, is knows as a circuit breaker reclosure. It actually

I'll trade this one in return: I was working on a minor problem with an "NF-105" receiver by Singer-Metrics. I had taken the line fuse out for safety: cartridge style, bayonet rear panel type, 3-Amp.

Assembled Electro-Lords: Ya know, I saw those advertised somewhere a while back and a guy who I resepct for his technical savvy said they were a bad idea. His thesis was that LEDs occasionally go bad

HI Gang, 10M AM is very active. Worked Ireland, Wales, Italy and England today using my restored Lafayette HA-410. 29.00, 29.010, 29.020. Have fun, Dale W4OP Sent: Saturday, October 1, 2022 11:51 AM

K2WH I have LED replacements in my Drake 2B and they are RF quiet. randy.ab9go@...