Welcome to the 3rd Generation HF Packer-Amp Home Construction Project.

This is version 3 of the popular HF Packer-Amp. Significant changes to improve construction have been incorporated in this revision. We went through and revised the artworks for the HF Packer-Amp. The changes are primarily to fix part foot prints and to improve the silk screen lettering. The changes are compatible with the existing HF Packer-Amp. The goal was to improve assembly.

Rev 2 Amplifier board

• Improved Silkscreen and circuit board routing
• Now using a 3rd generation design relay used in the SuperPacker Pro
• Added a jack for an external switch to change the T/R hold time for CW or SSB (optional - add user supplied toggle switch and wires mounted on the rear panel).
• Added 25-turn pots to set the bias current. This change removes the sensitivity of a 1-turn pot.
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PSU Rev 3 board

• Improved Silkscreen and circuit board routing
• Added 5V local regulator so the PSU may be tested without being attached to the amp board.
• Changed spacing on 1uH inductor
• Improved routing to eliminate potential shorts to standoffs.
• 3-pin Header now the proper length (no modification required).
  

LowPass Filter board

• Improved Silkscreen and circuit board routing
• Increased size slightly and improved part placement
• Corrected parts spacing and better placement identification

I would like to let you know that your HF Packer Amp performed beautifully for me today.
I was on the 17 meter this afternoon and the band condx wasn't particularly good. I heard a single JA calling CQ. He didn't hear me with my  2.5 watts QRP with an MP-1 antenna, but when I turned on the amp he immediately came back and gave me 57 and we were able to sustain a QSO. I turned the amp off during the QSO and he couldn't hear me until I turned it back on again. The amp clearly proved its worth and performed exactly the way I wanted it to.
Many, many thanks for all your help. You certainly made me a happy man.
Hiroki, AH6CY

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HF Packer-Amp

• 160-10 Meters; Filters
• 35W average typical output
• 5.1x3x3.3 inch; ¼ lb
• 12VDC; 6mA standby
• RF Sensing; 2.5W In
• SSB, CW, PSK
• Spurious –40dB
• Harmonics –45dB
• 2:1 Load Tolerance
• Medium Skill Level