Bitix 40 5 Pin #bitx40
开云体育Looks like that regulator still sticks out like a sore thumb on the raduino and the si5351 is not on the mother board where it really belongs.? However getting the spur/harmonic issues resolved is a huge step. ? MRM ? ? From: [email protected] [mailto:[email protected]] On Behalf Of Junkmail1@... ? The new bitix board has a revision with no socket for the 5 pin plug and there is nothing in the instructions to tell where the plug goes nor any help from seller its as if he does not know of revision so here is a pix of where it goes. -- …_. _._ |
开云体育Regulator remedy #2.? Swap the outside pins on the board and the thing now lays flat to the inside on the board and out of the way. ? In my RF design classes (eons ago) I was taught to keep RF signals localized and shielded as much as possible.? The si5351 on the Raduino board is the exact opposite. The shield idea works but doesn’t really fix the problem.? The si5351 should be as close to the mixers as possible. ? ? ? ? From: [email protected] [mailto:[email protected]] On Behalf Of Dexter N Muir ? Regulator sticking out? Remedy: solder-blob all 3 pins, remove IC, suck/wick/poke (gently!) holes clean and re-insert IC on other (really the 'top') side - keeping original orientation. There's room (at least there is on my old one) to tilt it over inside the board-profile... a heatsink might not fit though :( ... -- …_. _._ |
开云体育Hi I just did this to keep the 7805? a bit happy tnx 73 de Pop VU2POP ? From: [email protected] [mailto:[email protected]] On Behalf Of Dexter N Muir ? Regulator sticking out? Remedy: solder-blob all 3 pins, remove IC, suck/wick/poke (gently!) holes clean and re-insert IC on other (really the 'top') side - keeping original orientation. There's room (at least there is on my old one) to tilt it over inside the board-profile... a heatsink might not fit though :( ... |
MadRadioModder
Vic WA4THR
Ion Petroianu, VA3NOI