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SDR Cube Transceiver Online Assembly Guide Detailed construction notes for building and testing each of the SDR Cube kit modules |
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Softrock TX/PA
RXAMP Multi-Rx X-LPF Internal Cable Set External Cable Set Start Here for Quick Kits ==> Main Enclosure Digital Subassembly Test Final Assembly RF Functional Test |
Building the Softrock TX/PA Plug-in Module ... (Section version 1.0a) |
What Is It?
The TXPA (or PAF, as it is called in the Softrock literature) is a small plug-in module to the SR-Base board that serves as a small RF amplifier and filter board for the SR-Base. The builder of the TXPA Kit may construct the module for either of two band sets: 80m/40m or 30m/20m/17m.
PARTS LIST
Designator QTY Description C206, C207, C208, C209, C210, C211 6 0.1uF 1206 SMT D200 1 1N4003 P200 1 4 pin, header P201 1 5 pin, header Q204 1 2N3904 Q201, Q202, Q203 3 BS170 R200 1 475, 1% R201 1 56.2, 1% R202 1 68.1, 1% R203, R208 2 2.21k, 1% R206 1 221, 1% R207 1 22.1k, 1% R209 1 33.2, 1% R210, R211 2 2.2, 5% Hardware for Q200 1 TO18 heat sink for the group Q201, Q202, Q203 1 TO220 heat sink for the group Q201, Q202, Q203 1 TO220 Sil Pad 1 6-32, 1/2" screw 1 6-32, hex nut 1 #6 lockwasher 1 #4 nylon washer 1 Wire, #30, 15-ft 1 Wire, #26, 2-ft 1 PCB Band-Specific: 30/20/17 82pF 2 C200, C201 150pF 2 C203, C205 330pF 1 C204 221 2 R204, R205 T30-6, 1.6uH, 21T #30, 14" 1 L200 T37-6, 0.6uH, 14T #26, 10" 1 L201 T37-6, 0.6uH, 14T #26, 10" 1 L202 T30-6, Pri: 11T bifilar #30, 2x8", Sec: 1.74uH, 22T #30, 14" 1 T200 BN-61-2402, Pri: 6T #30, 10", Sec: 3T bifilar, 2x5" 1 T201 BN-61-2402, Pri: 4T bifilar #30, 2x6", Sec: 5T #30, 9" 1 T202 Band-Specific: 80/40 220pF 2 C200, C201 470pF 2 C203, C205 820pF 1 C204 221 2 R204, R205 T30-2, 4.7uH, 33T #30, 17" 1 L200 T37-2, 1.4uH, 19T #26, 13" 1 L201 T37-2, 1.4uH, 19T #26, 13" 1 L202 T30-2, Pri: 17T bifilar #30, 2x10", Sec: 5uH, 34T #30, 19" 1 T200 BN-43-2402, Pri: 6T #30, 10", Sec: 3T bifilar, 2x5" 1 T201 BN-43-2402, Pri: 4T bifilar #30, 2x6", Sec: 5T #30, 9" 1 T202
CONSTRUCTION STEPS
[____] STEP 1: Inventory the supplied parts
We basically supply a standard TXPA as is supplied in the Softrock RXTX 6.3 provided by Tony Parks.
[____] STEP 2: Go to the official Softrock Construction web pages by WB5RVZ and build your TXPA (also called the PAF) by following those instruction.
We are linking over to the excellent WB5RVZ Softrock Assembly pages for Cube owners to build their SR-Base and TXPA modules ... http://www.wb5rvz.com/sdr/RXTX_V6_3/
Robby’s done an outstanding job of documenting everything that needs to be done for the RXTX 6.3 ... and except for the few items noted here in our own SDR Cube Assy Guide, there’s nothing better that could be provided!
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Page last updated: Dec 31, 2010