Old Radios .

Here are some old AA5 AM tube radios, and a few solid state ones. In Firefox, click the right-hand mouse button on a picture and then do a "SAVE IMAGE AS" to capture the picture on your computer as an image file. Royalty free. Most of these sets are pretty common.

Click here to see two AA5 schematic diagrams, - a history of the AA5 radio, the "UL" knot - .
. Radios A-D, EF . Radios G . H thru K . Radios LMN . Radios OP . Radios R, S . Radios T thru Z .

By type:. Bakelites . Wooden sets. Clock Radios. Plastic tube sets. Solid state sets 70s , 80s & 90s, 2000s. Transistors .
FM only radios - 45 MHz FM b'cast sets - TVs - Radios in 3-D! - Radio station jingles - Radio index .

Click here for Fonts, and for chassis pictures, and here for radio pictures from the 1936 Acratone catalog.
Align an AA5 radio without signal generators. Identify outside foil on modern capacitors. AA5 Repair tips. Powerline RFI filter to install inside AM radios.
Radios in movie _Dr Strangelove_. A study of radio dials. Radios for foreign countries (ie, non USA). Deco and Moderne Radios IMHO, YMMV. Other Equipment
AA5 radio modifications: Circuit mods to do in ordinary boring AA5 AM radios. The ones you see for cheap in junk boxes at fleamarkets. Scuffed up but complete sets.
-Using a 12BA7 pentagrid converter in place of a 12BE6 or 12SA7 in AM tube radios. 6dB more signal gain.
-And more IF gain by replacing the 12BA6 with the 19HR6.
- Replace the 12SA7 with a 6SB7Y in an AA5, twice the signal gain.
-"K-tran" IF transformer tweaking for a little more gain.
-Longer loopstick for more signal capture from the air.
-Using car radio tubes in an AA5.
-Using a dual control pentode such as the 6AS6/5725 in the IF of an AA5 radio.
-An AA5 modified to be a double conversion SW set (5.5 to 16 MHz)
-Negative feedback in AA5 audio amps
-Infinite impedance AM detector in an AA5
-High fidelity AM detector (mods for better modulation acceptance)
-Wideband AM IF filter for 10KHz of AM radio station audio reception
-Three AM tube radios using sub-miniature tubes, and one using compactrons. Another using both.
- AA5 AM tube radio designs to run on 240V AC, four methods (a "what if" study).
-To run an AA5 on 100VAC (Japan), replace the 50C5 with a 35C5 or 30A5, or if it's a 50L6, use a 35L6. Optional: install second 1K resistor in parallel with the resistor connected between rectifier output B+ and the output tube screen/ B+ for rest of set. That is, between the two sections of the electrolytic. Diagram
- Explanation of humbucking via a tap on the output transformer used in some AA5s, just above here
- Small micropower AM transmitters to build: tube, or solid state.
Modifying older digitally tuned AM receivers to get the extended AM band. Example shown is the AKAI AAR32 stereo set.

It's sometimes fun to use HP and Tektronix tubes in TVs and radios. Older surface mount caps had markings, here "AA5" 1st A=manufacturer, 2nd A and 5 =1.0 x 105pF

My father built this years ago for the stereo equipment in the living room. The B&W photo shows part of it in the upper left corner, as it was in 1960. Sketchy woodworking plans of this furniture style electronics rack, for rack mount equipment. Improve the SAF (spouse acceptance factor) of your equipment!

Two schematic diagrams of the typical "AA5" AM tube radio:

knot is symmetrical: .
You name it, the Catholic Church had a patron saint for it.

If you are from a 240V AC country, and just moved to America, see if your apartment or house has an outlet like this. 240V at 15 amps (NEMA 6-15). It's intended for large air conditioners. But not the electric dryer or range outlets, those are too much amperage and if your equipment ever shorts out could cause a fire. If your old equipment designed for 240VAC doesn't mind 60Hz (most stereos and non-clock radios will be fine on 60HZ, but turntables probably will play too fast), you could use this outlet, or have one installed in your house or condo. You'll need to modify an outlet strip you bought in your home country by changing its plug to match the American 240V outlet. Be aware that both sides of the mains in this plug will be "hot". That shouldn't be an issue in well designed equipment, as many European plugs fit in many European sockets either way. Like the Italian 10A and 16A plugs, Schuko general use 16A (the ones with ground contacts on the sides, not the "pin in the socket that sticks into the plug" type), and 2 pin Euro plugs. That makes both power wires on a radio's power cord potentially hot in Europe anyway.

And a few Australian style American outlets made by Hubbell in the late 40's, here, in my house, feeding 240V 60Hz to an Australian
Calstan radio, and this Philco from New Zealand. And some pictures I took during a vacation in Australia in April 1986 🌏
I also taped some Aussie radio airchecks during my trip

Links to other sites on the Web

My other web page:
* sub-miniature tube info,
* Old Electric Clocks pictures,
* Modified AM radios with sub-mini and compactron tubes
* FM solid state radio tuned front end RF amp stage mod, replace a BJT with a JFET, lower intermod. and added a tuned AM RF stage
* Using voltage controlled resistors (JFETs) to vary, via the radio's AVC voltage, passbands of IF & antenna LCs on weak → low monkey chatter, or strong → hifi audio, AM radio stations.
* Simple test of junk box JFETs
* Using a WRT54G v2 router running OpenWRT as a web page server off a USB stick for your AREDN node
* Using an OpenWRT router to provide multiple ports to an AREDN node that has a single POE network port
* Internal USB stick in a modified WRT54GSv1 OpenWRT router, also as a web page server
* Determine minimum number of turns for a 120V60Hz transformer primary
* Using an LCR meter to measure the impedance of an output transformer
* Convert a USB cell phone charger to a remote USB power supply also mofigy a USB charger to have an iPhone draw a half amp when charging via lightning cable
* Replave neon bulb with LEDs in a Mickey Mouse nightlight
* Astro art pictures

Extensive list of radio web pages

All trademarks are owned by the companies that own them.

Ham radio page

. My town's 4th of July beer party

circuit for creating semiregulated DC for heaters, very little waste heat
Connecting a PC to have AREDN mesh net access AND internet access, by using multiple NICs
In case you manage to lose access to the OpenWRT web page user interface
Using a Raspberry Pi as a web server on your AREDN node

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