This is an old hobby of mine which I do not do anymore due to time and space. I was always into repairing radio's, and building all sorts of projects.
Below are some of the replica radio's I built, and a couple of bought radio's that I have in my collection. I cannot remember all the details and dates for these radio's, but do know that all of them were in working order.
This was the first of the replicas that I built, it took me about a Month to do as I battled to get the sound to come out the speaker, but I did succeed in the end. The speaker horn is made from paper mache, and all coils being wound by hand.
The next radio is a single diode valve radio which is one step up from a crystal radio. Coil was wound by hand, and as with all valve radio's, has a 90 volt supply for the main circuit and a 3 volt supply for the heater of the valve.
As you can see from the above photo, the valve still has a glow to it.
The next item is a "Hughs Microphone" replica from the 1850's. This microphone is very crude, and the sound from it is also very poor, but I suppose in them days, it was a miracle.
I still have a couple of valves, not sure if they still work.
The next radio is a Hallicrafters that was built in 1943 (original). This radio and the Morse key to follow were both left to me in a friends will after he passed away. We were both very much into radio's and spend many hours together building and testing radio's, and talking to the world using these radio's. This radio is also in full working order.
This Morse key is made of brass and copper and wood, and was made by my friend who happened to be quite an expert with it. The callsign on the key was his own.
The next two radio's are just a bit unusual..... The first being built into a pair of sunglasses, and the other one built into headphones.
The glasses are from the sixties, and the headphones from the late 70's early 80's.
My last item is an old Marconi milliamp meter. Not sure of the date, but do know that Ernest Turner Instrumentations company was very active in the 1940's fighting law cases to have music playing in the workplace, which was rejected due to infringements of the music companies.
Below is one of the first crystal set radio's that I built. It works very well but does need a very long wire for an antenna.
You have to use a small headphone or earphone on this radio. The best part of the crystal set is that it needs no electricity, i.e. no batteries. The electricity is produced from the antenna from the signals and picked up through the crystal in this case the diode. Great fun to sit and listen to the stations through this radio.
This next radio is a basket weave radio from the 1800's (Replica).
This radio is also a crystal set (no electricity) and if you look you can see that this radio is using a galena crystal and not a diode. The little arm has a little whisker on it which touches the crystal to do the same job as the above radio's diode. The reason it is known as a basket weave radio?
This was quite a coil to wind.... what happens is when you pull the knob on the front panel, the front basket weave coil moves in and out. The stations are chosen on the distance between the two coils. Although this radio also only plays through headphones or earphone, it does pick up a lot more stations and further away stations.
Radio's and electronics is a fun hobby although takes up a lot of time and can cost a fair amount of money to do. One of the main reasons I gave up besides the time and money, was the new integrated circuits that the equipment was made from. If you look inside of a television or radio now, it is a complicated mess. Repairs in now a thing of removing the board and replacing with a new one. Gone are the days of replacing a resistor, or changing a transistor.
I do hope that you have enjoyed this page.