The Defpom Forum, for RadioMods, S&M Software and Music by The Defpom

Is there any way of correctly identifying the PCB from a galaxy pluto mobile? My friend wants to perform a frequency expansion on his rig, yet cannot give me any info about it. The I.D. tag is missing, and the only part numbers he could give me was RJE1065627, on the board, which I could not match up here, And TDA6130-5, on the processor. I heard there was several boards used for these radios. I'll be going to his residence in the next few days, so pictures, if available, would be nice. Thanks in advance for all the info................fuzzyfireman338

What is the PLL number? I have seen 3 types of PCB, no the component side you should find a number which starts with E or P. Hope this helps.

Rick.

THX!!
Rick, you were a great help. I got him to open it up and search a little harder and discovered the P/N of the board: EPT360014B. The only other question that I had was how to perform the channel expansion? In the original manual that came with the radio, the TX and RX frequencies are described as hi and lo bands, with about 1/2 a MHZ drop down between them. He is currently on the HI band, and we desire the lower band that starts around 25.605MHZ, (close to it anyways). I looked at the mods for the DX44V model, would it be the same? If so, how can you get 8 bands from a radio with a 6 band selector without adding an external switch? Your expertise would be greatly appreciated. thank you in advance, hope to hear from you soon! fuzzyfireman338

Well I do this sort of a mod with a EPROM or a PIC. One trouble you may have is that the VCO will fall over when you go down the band. I think you should be able to go down to 26.065 and up 28.305 with the stock xtal but you can change the stock xtal to 14.010 MHz which will drop you down to 25.165 to 27.855. I do not think you will get 8 bands with out trouble. It works like this PLL binary count of 46 which gives you a VCO downmix of .46 + new xtal of 14.010 = 14.47 + carrier xtal of 10.695 = 25.165 which is channel 1 of the bottom band and channel 40 is binary count of 90 which gives you a VCO downmix of .90 + new xtal of 14.010 = 14.91 + carrier xtal of 10.695 = 25.605. You need to see what frequency you can go down to with a binary count of 46. Let us know how you get on.

Rick.

Rick is a very clever guy I have been read this post for some time. He knows this onions.

James (aka, Unit 198)