Function:

Gain and Filter; provides drive to RF Power Amplifier

Input/Output:

• POWER: 9-15 VDC, 5.5 x 2.5mm power jack
• RF IN: Zin = 200 ohms, expect 0.8 V p-p, RCA Jack
• RF OUT: Zout = 50 ohms, BNC Jack
• KEY IN: Zin >=10K, driven by CMOS, RCA Jack, 0 V = key-down (i.e., transmit)

Operator Controls:

• Drive Level (may be screwdriver trimmer)

Key Specs or Limitations:

• Frequency: To be determined
• All stages should be linear (i.e., class A or AB)
• Expect Input signal of 0.8 V p-p into 200 ohms
• Output Power (at Vsupply=13VDC): 350 mW (10.8 V p-p into 50 ohms)
• At least one stage should have a tuned tank circuit
• Output stage should withstand loads of 5-500 ohms without damage
• Backwave (during key-up) should be at least 25 db down (i.e., < 1 mW)

Misc Notes:

Pay attention to keying waveshape, as this will influence final transmitted signal