SHORTWAVE/AM 12SN7 BROADCAST REGEN RECEIVER 540 KHZ TO 14.5 MHZ COVERAGE

Description

This listing is for the 12SN7 dual triode Regenerative Receiver that you see in the photos. It comes with plug-in coils, a high impedance piezo headset and an 8-pin plug-in connector for your power supply.
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 dark hammered finish, but other common colors are possible. Please let me know if you have a preference. I try to stick with a spray paint that can be purchased at Wal-Mart, local hardware outlets, etc.
The frequency coverage is the AM broadcast band, continuous to about 14.5 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.
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. Regen action will begin with the B+ in the 12 to 14 volt range( connected in parallel with the filament), but the gain will increase when the amp/regen circuit is powered separately with well filtered dc in the 18 to 30 volt range. You'll need a filament supply capable of about 350 to 400ma. The B+ circuit works great with either 2 or 3 nine volt batteries connected in series.
You will need a wire antenna at least 25 ft. long and a good earth ground. You'll pick up more stations 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 .
SHIPPING TO THE UNITED STATES ONLY.