This is an archival copy from 2002.
For the up to date site please visit
Welcome to Dave's homemade radio pages.
These radios were built by myself in 2002, except
for the top center which I restored and the bottom which is a german
"peoples radio". As you flip through my crystal set and tube radio
pages, you will see that I am in serious need of more shelf space,
and perhaps should have my head examined. On the latter, please
keep your comments to yourself.
On this site I will show you the more than a dozen crystal radios
and half dozen tube radios that I have built. Also there are
pages about components that I have built. Most of these sets are
very reproduce able but a few use very hard to find parts.
Please note that the radios that
I have built and are featured on this site are made without regard
to any solid scientific basis. They are built from the mind,
the gut and what I find in my junk box or on ebay!
The fifth crystal set contest has been announced at
Owen Pool's site.
I am planning on entering, are you?
Hello crystal radio fans. Glad
you stopped by. I always like telling my story. For those that have
passed 50, this story will most likely sound familiar. That is, we are
yearning to relive our childhood. Well, for a small sum of money I was
able to do the same. Above you see the results.
A "crystal set" is a radio receiver that requires no batteries, or
household electric current to operate. It has no apparent power supply.
I will tell you at the end of this article how this radio gets it's power.
The crystal set was the first radio for broadcast reception. Back then,
these radios used a galena crystal (a piece of rock that acted as a
semiconductor to recover the audio from radio frequency waves). Since
then, the semiconductor diode has replaced the galena in most designs
as it is one less thing that the user has to fiddle around with.
Since the crystal set is self powered, headphones are required for
listening. This ain't your son's ghetto blaster. The sound is quite
faint but still easy to hear.
About a month ago (March 2002) I had several customers coming in where
I work expressing a desire
to build a crystal set. One was for a school science project. Another was
teaching a class in electronics to adults and thought a crystal set might
be a good teaching tool. A university customer ordered parts to build
over 50 crystal sets. This is all it took for me to get started.
I decided that I wanted to build a series of crystal sets. I wanted to
start with a basic model and work my way up the performance ladder. I
had built several crystal sets in my teenage years. I used parts that
were laying around the house. Having grown up in a "ham radio family",
coils, capacitors and diodes were easy to find. This time around, I
decided that I would research this and use the best components that
I could find.
So, have you figured how this radio gets it's power? No batteries,
no ac power plug. The radio stations themselves provide the power
to a crystal set.
I have decided that I would offer my crystal sets
for sale. Please check my sale page. Get them
while they are hot! Thanks.
Comments and questions may be e-mailed to me at .
This page updated last on 12/01/2002 18:00:00
by(c) by David Schmarder