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--- ts450s [2024/01/02 14:28] – [Repair History] admin
+++ ts450s [2025/02/16 01:27] (current) – admin
@@ Line 1: / Line 1: @@
 ===== Kenwood TS-450S =====
-  * Got on 2023-12-31
+Serial 40800518 - lots of late '91 date codes on parts
-  * "Has issues"
-  * Photos: https://photos.millerjs.org/?f=Kenwood+TS-450S
-  * Serial 40800518 - lots of late '91 date codes on parts
-  * Has ATU, don't know if it's original, tuner jumper in place and clipped, not sure if that is done in factories.
-  * Overall good cond., some rust on the lid, boards are clean
+==== Photos ====
+{{gallery>:ts450s_photos}}
+==== Issues ====
+=== Phones Jack ===
+Cuts speaker audio, but does not carry any audio itself. Ext Spk jack on rear works correctly.
+Have not yet put the output of the jack on a scope to see if there's low signal or no signal.
+=== PLL Unlock ===
+Intermittent behavior, first noticed on 24-1-7. Rig displayed dots across the digits and played "UL" in morse when changing bands.
+Some info here: https://www.qsl.net/wb4kdi/Kenwood/TS-450S/TS-450_HELP.html
+May be broken or improperly adjusted TC-1 causing the loss of heterodyne xo VCO2 (board X58-3390), 64.22MHz. TC-1 is P/N C05-0331-05, 25pF.
+{{:ts450s:x58-3390-parts.png?400 |}}
+=== Audio Distortion ===
+https://www.youtube.com/watch?v=Y2A_LeiSieI
+May be issues with C99 & C101, both in the audio chain near C104. (On IF Board X48-3090)
+  * C99 - 330µF - 25WV
+  * C101 - 470µF - 6.3WV
+More likely tied directly to the PLL unlock issue.
 ==== Repair History ====
@@ Line 21: / Line 45: @@
   * https://www.digikey.com/en/products/detail/mitsubishi-materials-u-s-a-corporation/DSA-301LA-05-UL/11306216
   * https://www.mmc.co.jp/adv/dev/english/pdf/Division_PDF/dsa.pdf
+=== VCO2 ===
+  * 2024-01-10 - Checked TP3 on PLL board. Measuring 3.959v on startup. Should be 5v.
+==== Potential Upgrades ====
+  * FPGA-based carrier board: http://www.iw3aut.altervista.org/wordpress/?page_id=1864
+  * SO-2NG TCXO: http://www.iw3aut.altervista.org/wordpress/?page_id=1567
+  * ebay drop ins:
+    * https://www.ebay.com/itm/333679994405
+    * https://www.ebay.com/itm/174263546977

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