Texas Star Dx500v Unmodified Stock 10 Meter Amplifier
For sale is a unmodified factory stock Texas Star Amp. I have gatekeeper modded units in stock. These transmitters are designed for mobile or base CW operation. Powered by the 12 volt vehicle battery or 12 volt regulated power supply, the maximum power output is less than 5 watts RMS. Frequency of operation is within the 10 meter band, determined by installation of a crystal into the oscillator board. The transmitters contain a transmit/receive relay and an output connector for the receiver to share the antenna and permit break-in operation. Red "POWER" Button turns the unit on and off. White "REC AMP" Button turns the receive amplifier on to provide 6dB of gain for your receiver. This will work independently of the power button -- that is, the white button may be pressed "on" even when the red button is off.
The oscillator may be operated without any output to the antenna. You will be able to hear the signal in your receiver. This may be useful to adjust your electronic keyer or to practice your Morse Code off the air. Green Button reduces power on all models. On models DX 400V and DX 500V, it also activates the RF Output Knob.Yellow "DELAY" Button reduces power and adds delay to the transmit/receive relay to accommodate different transmission rates for break-in keying operation. On models DX 400V and DX 500V, this button adds delay but does not reduce power. RF Output Knob controls RF output level when the Green Button is engaged.
On the DX 667V only, the RF Output knob is operational at all times. Meter is an RF Relative Output Indicator and lights during transmission.
A Crystal made for series operation must be installed into the holes labeled "X-1" near the top of the oscillator board. The frequency should fall between 28.0 MHz and 29.7 MHz.