AM Radio

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WWV
NIST Radio Station WWV

The station radiates 10,000 W on 5, 10, and 15 MHz; and 2500 W on 2.5 and 20 MHz..

The 30 and 35 MHz broadcasts were discontinued in January 1953 and the 25 MHz broadcast was stopped in 1977. With the exception of an almost 2-year interruption (1977-78), the 20 MHz broadcasts have continued to this day.
 
I used it to test the stability of my first ham radio converter, a single 6U8 attached to a RCA 3 band receiver (PP 6V6 at the output) and after it he beat oscillator for SSB and RTTY, very useful then.

Some years after it I made my own 80-40-20 mts band receiver consisting of:

6BZ6 first RF,
6BE6 converter,
2 * 6AU6 FI (Two stages)
6AV6 detector, AGC and pre-amp,
6AL5 noise limiter,
6AQ5 audio out´
80 rectifier,
Electrodynamic 6" speaker (!500 ohms field coil)
6C4 beat oscillator,

The RF coils winded in PVC tubes of 25mm after glued to 8 pin tube sockets.

Tesla 32+32 microfarad 500V with the bakelite thread.

FI trafos was the well known "KTran", one of the bests of that era.
 
I'm listening to Bloomberg raidio right now live streaming on the internet but the originating program is broadcast on 1130 AM out of New York City.

I probably still have around somewhere the simple AM radios I built as a kid as my first electronic projects. I used to even do the DX-ing mentioned making note of the farthest station I could pick up over night running to find a map to see where the city is located. My kids are not interested in anything like that, just xbox and sponge bob. How things have changed!
 
My kids are not interested in anything like that, just xbox and sponge bob. How things have changed!

Yes, I enjoyed to make my own rigs, and still today, but newer generations ignore how to make simpler toys.

Contrary, a brother of a job companion, of only 20 years enjoy listening tango vinyls in a "Tocadiscos" (stand alone turntable), here known as "Wincofon". Ja ja ja....there is people for all.
 
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