Description: ****THIS IS A SCHEMATIC ONLY OF THIS TRANSMITTER**** Similar to one of my other listings, but this transmitter has the added bonus of working on the 630 meter ham band. The schematic will show component values and I will give you a sheet showing different coil specs, but no manual or instructions are provided. So you'll need to have experience reading schematics along with some practical construction skills. Most any chassis style will work, including a simple breadboard. You can't beat this design for simplicity. A single tube 6V6 cw transmitter, with just a switch and one control on the front panel. Once properly adjusted, with the single front panel control, it produces a real nice cw tone. The transmitter shown was constructed in the pine wood slat board style, typical of similar items found in the 1930/40's era. The power requirement is a single 6 to 7 volt dc source, capable of providing about 2 amps dc current, when transmitting. This can be either a bench top dc supply or batteries. A single front panel switch provides power on/off, standby and transmit functions. In standby mode the filament only is turned on, with just over 1/2 amp current drain. Switching to transmit provides instant dc voltage to operate the 6V6 transmitter circuit. In standby mode no high voltage is being produced by the inverter power circuit, which employs a 6.3 filament transformer, driven by power transistors. When the inverter is active the no load dc voltage is over 200 volts DC, which can be QUITE LETHAL if not handled with the respect you'd allow for any high voltage circuit. High voltage is only present inside the slat board chassis. The plate circuit is shunt fed, so there is no high voltage on any of the exterior parts or controls. In key down transmit, the dc power supply voltage drops to about 150 to 155 volts dc. This is quite normal. Depending on the band and activity of the crystal used, the RF power out varies from about 1.8 to 2.25 watts. Not bad for a single 6V6, operating from a 6 to 7 volt dc source. Obviously, if you intend to transmit beyond the county line on the 630 meter band, you'll need some amplification and an antenna designed for that band, which is below the am broadcast spectrum! I guarantee this transmitter will work if properly constructed and connected to a power source and your ham radio antenna. A good earth ground is always essential for best performance. Mailing via first class envelope to the United States only.
Price: 24 USD
Location: Grand Junction, Colorado
End Time: 2024-09-01T15:31:56.000Z
Shipping Cost: 0 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: N/A
Type: Ham Radio Transmitter
Model: 6V6
Band: HOMEBREW
