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    Is this a NPC-mod or something else - Ranger RCI-69VHP (EPT690012D - Same as Ranger RCI-69 base)

    Working on a RCI-69VHP (bought new from dealer in USA, I am located in Sweden). Same board as RCI-69 base, i.e. EPT690012D. I see a strange mod where C112 has been replaced with a diode and a tantalum cap (as far as I can see): Maybe the tantalum cap is original and a diode has been...
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    Ranger RCI-69VHP (EPT690012D) - Trimpot VR15 and testpoint TP9 - what are they for?

    I have read through the very good threads many times about the alignment of bias of the RT1 (IRFZ24NPBF) MOSFET's on the Ranger RCI-69 base as well as the alignment of the MOSFET's on the Anytone 6666. Two questions: 1. When I look at the schematics for the RCI-69VHP (EPT690012D) there is a...
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    Petrusse Excalibur 2002 (PTBM131A4X) - TX freq off approx +1.7kHz in all modes and all bands, RX ok

    Petrusse Excalibur 2002 https://www.cbmuseum.nl/images/petrusse_escalibur_2002.jpg Mainboard is PTBM131A4X which is the same as for example Superstar 2000. Schematics at for example http://www.cbtricks.com/radios/superstar/2000/graphics/superstar_2000_sch.jpg This radio has a FINE TUNE that...
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