I
make these to order, so please allow 7 to 10 days for shipment once
your order has been placed. The one pictured has a black hammered finish,
but other common colors are possible. Personally I like the gray hammered finish. Please let me know if you have a color
preference. I try to stick with a spray paint that can be purchased at
Wal-Mart, local hardware outlets, etc.
The frequency coverage is from just below the 630 meter ham band, up through the AM broadcast band and continuous to about 16.0 mhz, simply by changing the plug-in forms provided.
You
will need a well filtered DC power supply (or batteries) to power this
radio. The supply should be capable of at least 12 to 14 volts DC. I
have provided a means of powering the filament and B+ separately for
increased gain, if desired. The wire harness has two separate leads (plus common ground) so you can do this.
Typically
I find the best performance is when the filament supply is at 12 to 14
volts, with the regen/audio amp circuit powered separately with a dc
voltage in the 18 to 30 volt range (40 volts max). Connect the filament/B+ wires in parallel to use only a 12 to 14 volt source.
Regen action will begin with the B+
in the 12 to 14 volt range,
but the gain will increase when the amp/regen circuit is powered
separately with well filtered dc of about 18 to 30 volts. You'll need
a filament supply capable of about 350 to 400ma. The B+ circuit requires less current and works
great with three 9 volt batteries connected in series.
You
will need a wire antenna at least 25 ft. long and a good earth ground. More stations will be received with a longer antenna, 50 to 100' in
length. I'm able to copy multiple am broadcast and shortwave stations in
the early evening hours, including signals on the amateur radio bands.
A
hand sketched wiring diagram will be provided, along with instructions
on where to hook the antenna, power and headphones. The 8-pin power
plug/wiring harness is included. All parts, with the exception of the
vacuum tube, are new. I cannot always obtain new tubes, but guarantee
the 12SN7 will test good. Controls are main and fine tuning, antenna
coupling and regen setting.
I
guarantee this radio will work if you hook it up properly with
appropriate power supply and a good antenna. The 12SN7/6SN7 tubes have
been used for many decades to make reliable, good performing
regenerative receivers .