| *** Build the AC-1 Junior *** |
| The AC-1 Junior, One Tube QRP Transmitter, is a follow-up to the first kit I offered, the Glowbug 40. This kit is very similar to the Glowbug 40 kit but it includes some extra features not found in the first kit. These features include automatic antenna switching, break-in keying and a 3-position crystal selection switch so you can switch between 3 crystals in the same band. Output circuit is a pi-network for reduced harmonic output and the kit includes a high quality silk screened enclosure. |
| AC-1 Junior Features: * Can be built for the 40 or 30 meter band with approximately 1 watt output. * Crystal selection switch allows switching between crystals in the same band. * Safe voltage (9 volts or less) at key. Safe for you and your keyer. * Built-in high voltage power supply. * Break-in keying. * T/R circuit is a relay so it's not frequency selective. You can keep the AC-1 Junior in-line with your receiver while monitoring other bands. |
| How it works... The 6AQ5/6005 tube is connected as an electron-coupled crystal oscillator. The output of the oscillator is routed through a pi-network that transforms the high impedance output of the oscillator to a low impedance of about 50 ohms to match the antenna's input impedance. The pi-network also reduces the harmonic output of the transmitter to meet FCC requirements. The key operates a high speed relay which keys the tube cathode and also does the antenna switching. |



| Sold Out Of Kits! I do not know at this time if I will do another run of these kits. I will announce it here if I decide to. Thanks very much to all that purchased kits! I appreciate all the kind email's I have received regarding the kit. Best regards, Dwight Morrison, KG4HSY |