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thank you for your quick reply. Unfortunately in the european version neither removing R1 nor R2 (and both) doesn't allow you TX out of band. Removing R2 converts the radio in the japanese version.
I contacted Kenwood through our dealer and hope to get a response soon.
You might look at r3 and r4 on the E-board. I don't have my A yet, but in articles I've found, I have not found the 'A' status of r3 and r4. On the E2 version, it seems that R4 is removed already. I believe they are all 1kΩ resistors.
I can't confirm that removing R2 for the TH-D75 extends the TX range. Removing R2 converts the radio in a japanese version. Have you really tried transmitting outside the bands?
I recognize this is an old post, hopefully not a dead thread... lol.... I recently purchased a TH-D75A w/ MARS/CAP mod... the only extended TX range appears to be limited to 142-144MHX, 148-149MHz, 216-222MHz, and 420-430MHz. The mod did not extend TX range above 450MHz. Have you had different results? I'm running the latest firmware, v1.03.
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