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--- projects:amateur_radio:modifications:htool_ht004a [2024/05/25 04:34] – created Andrew Yong
+++ projects:amateur_radio:modifications:htool_ht004a [2024/05/25 04:37] (current) – no battery SKUs still ship with the charging circuit Andrew Yong
@@ Line 1: / Line 1: @@
-====== HTOOL HT004A Modifications ======
+====== HTOOL HT004A LNA Modifications ======
 <blockquote>HT004A:\\
@@ Line 24: / Line 24: @@
 ===== Modifications =====
-  * Gain block
+  * **Gain block upgrade**
     * Replace TQP3M9008 to [[https://www.qorvo.com/products/p/TQP3M9009|TQP3M9009]], Δ+1.2 dB gain, Δ+3.5 dB OIP3
     * Replace SBB4089Z to [[https://www.qorvo.com/products/p/SBB5089Z|SBB5089Z]], Δ-0.2 dB NF, higher OIP3 gain
     * Perhaps [[https://www.qorvo.com/products/p/SBB1089Z|SBB1089Z]] would be even better for satellite reception because of the narrower frequency range of 50 - 850 MHz
-  * Charging circuit delete\\ {{:projects:amateur_radio:modifications:img_6109.jpg?400|}}
+  * **Charging circuit delete** (no battery SKUs still ship with the charging circuit)\\ {{:projects:amateur_radio:modifications:img_6109.jpg?400|}}
     * Remove ''U1'' TP4056 (reduce noise)
     * Remove ''R3'', ''C6'', ''C11''
     * Remove ''D1'' and short with wire jumper (reduce noise and increase gain by removing supply voltage drop)

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