Description: This looks like something that fell out of the sky at Roswell, New Mexico, 1947. It is a QRP rig capable of both transmitting and receiving on the 80, 40 and 30 meter ham bands. This quirky little radio works great! I make these to order, so please allow about 8 to 10 business days for shipment once your order has been placed. Many different color options are possible, so if you want something other than that pictured please inquire. Most anything reasonable I can accommodate. The radio uses a pair of VHF dual pentode tubes. The 832 functions as a twinplex pentode regen receiver, while the 815 is the cw transmitter. Coils and QRP crystals are included in this listing for operation on the 3 bands mentioned above. The radio also comes with hi-z headphones and the wiring harness that you see in the photos. I can also make a receive only coil for the am broadcast band, as well as a coil for send/receive on the 160 meter ham band, if desired. Please inquire about charges for additional coils. You'll need a well filtered 25 volt source capable of at least 1 amp dc for the filament and regen circuits. Ideally something that will deliver about 1.25 amps continuous duty is best. A separate input line on the wiring harness feeds the cw transmitter plate circuit. At 50 volts dc I get just under one watt output. You can easily double or triple the power out by using a 75 to 100 volt dc source to power the transmitter. I can get about 170 milliwatts output just using one 25 volt power source, connected in parallel, for both receiver and transmitter. The regen radio works strictly off the 25 volt source, so you may opt to run the receiver alone, with no power applied to the transmitter, other than the common filament voltage. These are 12 volt filament tubes, so since both pull 0.8 amps I connected the filaments in series. So you'll need a 25 volt dc source for the filaments. The receiver works wonderfully with the 25 volt filament line as its operating voltage for the regen detector and audio amp circuits of the 832 tube. So, again, no need to apply transmitter power voltage if you simply want to run the regen radio by itself with a 25 volt dc source. Regenerative receivers will virtually always sound best if powered with a battery source. The transmitter tank circuit employs the double parallel/series method, just like the old Paraset Spy radio. It works great and can load into any reasonable length of wire for an antenna. The radio has a send/receive switch which transfers the antenna so that one antenna functions for both send and receive. Obviously you will need a ham radio license to put this radio on the air. A hand sketched wiring diagram will be provided, along with instructions on where to hook the antenna, power and headphones, etc. About 80 to 90% of the parts are new. Since a few of the parts are from good used stock I am listing the radio as used, even though most of the parts are either new or nos. Controls are main and fine tuning, antenna coupling and a regen pot for the receiver, plus PA and antenna load tuning for the transmitter. The regen pot also has a power on/off switch. I guarantee this radio will work if you hook it up properly with appropriate power supply and a good antenna. These old vhf power pentode tubes make great regen receiver/transmitter tubes.
Price: 295 USD
Location: Grand Junction, Colorado
End Time: 2024-03-06T13:49:35.000Z
Shipping Cost: 20 USD
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Item Specifics
Restocking Fee: No
Return shipping will be paid by: Buyer
All returns accepted: Returns Accepted
Item must be returned within: 14 Days
Refund will be given as: Money Back
Brand: homebrew
