ΜBITX/Power, spurs, and harmonics

Parts and instructions

Levelling out power

KB1GMX's fix:

• Replace the 2N3904s (Q911, Q912, Q92, Q93, Q96, Q97) with 2n2222 (TO18) (using the shortest leads possible).
• Stack 22Ω 1206 SMD resistors parallel to R941, R911, R96, and R942 (for 11Ω each)
• Replace Q90 with BFR106
• Increase R81 to between 2KΩ and 2.7KΩ
• Change C81 to 470 pf

Reducing harmonics

Replace the four relays with

• 4 × Axicom D2n 12v relays (model V23105-A5403-A201

Reducing spurs

Replace L5 & L7 with

• 2 × 1210 SMD inductors at 680nH or 681nH

Dummy load watt meter

Per this post of mine.

• 1 × MCP6021 op amp