Check the listing for details. 832 TWINPLEX AM BROADCAST & SHORTWAVE REGENERATIVE RECEIVER (SCHEMATIC ONLY). Condition: Used. Listed at 9.97 USD. This listing is for a schematic only of the 832 Glow-Bulb Regenerative Receiver that you see in the photos. This radio uses plug-in coils to achieve a spectrum coverage of approximately 530 khz to 14.5 mhz. No step by step instructions are included with the schematic. However, my hand sketched drawing will indicate all component values. Along with the schematic you will receive some general notes on regenerative receivers, plus a list of coil specifications for many different frequencies, including long wave, am broadcast and shortwave coil data that I have used with this and similar radios. You will need a high impedance headset to operate this radio (2 to 4K ohms). Piezo type headphones will also work well. This 832 dual pentode twinplex circuit is a super performer. It compares with the 815 radios that you will see on some of my other listings. In this circuit, one pentode serves as the detector, while the second pentode is the audio amplifier. Always use battery power when possible. A little outboard ac supply is okay so long as the rectified dc it is well filtered and kept at a couple of feet or so away from the radio. Regen receivers like to pick up ac hum from transformers when close by, so I always use batteries where possible. The only power needed for this radio circuit is 12 to 14 volts dc, at about 1.2 amps, continuous duty. 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. On shortwave I'm able to copy tons of stations in the early evening and early morning hours, including stations on the amateur radio bands. The fine tuning control will allow you to clarify ssb and cw signals. Operating controls for this circuit are main tuning, fine tuning, regen control with on/off switch, and antenna coupling. These VHF 832 power pentode tubes make great regenerative receivers. Again, this listing is for a hand sketched schematic drawing of this radio only, along with notes, as described above.