By serial number I’ve dated it to around 1989. I think, this trick is not a excellent way of a RX-Attunator, but it works ufb here in my rig.I know at some point I’ve mentioned that I own a venerable, old Yaesu FT-736R. Using the preamp-switch (this switch has a free row) You can easyly switch between attunation and normal use by making a bridge over the new 1.2 KOhm Resistor with this contacts. Cat Software Yaesu Ft 736R Mod Series With R02Ī second resistor with the value 1.2 KOhm in series with R02 decrease the sensivity for 6 dB. Locate the transistor Q01 3SK122L and look at the source-resistor R02 (47 Ohm). You may store these frequencies in the SAT Memories.Ĭhuck Rich Gopstein gopstein Copied from the QRZ Windows Ham Radio CDROM.
You cant perform this stunt with the normal (non-satellite) VFOs. Unfortunately, the synthesizer does not actually cover that range.Īs far as I can tell the bottom end is about 138.5 (not quite the 136.5 needed for the weather sats). To receive over a slightly wider range, place the SAT switch in RX mode, press ENTD then enter a desired frequency and press ENTD again. You want the cathode (striped end) of a small signal diode in pin 7 and the anode in pin 4. The connector (J09) is the large one on the right side of the board, half way back. The 2 Meter section is the middle board looking into the radio from the top. This is normally soldered to the board but you can easily install it by simply shoving the leads into the connector. I tried it on my FT736, and it works I wonder what the other diodes do Does anyone have a service manual for the FT736 Fm: Chuck Scott N8DNX 76556,3335 You can modify the 2 Meter section for 141-154 MHZ by adding D27 (not installed in USA version). Cat Software Yaesu Ft 736R Mod Manual For The
I will try to use PDF file later, or some other format). I use IrfanView (version 3.17) for printing my PCB-layout scaled x 1.05 gives me the correct size. Unfortunately I had to use a bitmap-file for the layout, you have to scale this to a PCB size of 6942.5 mm. I hope I can present a second PCB within a few weeks that can fit in a 9 pin sub-d connector, unfortunately this means soldering some SMD. I made a modification to the original circuit because the second set of ports in the MAX232 are better for making a nice PCB.
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