I think so also.
Original germanium transistors (power stage pair) were cooled by the chassis, I wonder if regulators could be also...
Heat sinking - bolt the power IC (and regulators, if used) to a piece of angle aluminum, and use that to mount the whole perfboard to the chassis. You will need to use TO-220 sil-pads, kapton or mica insulators - whatever is on hand or easy to get. Keeping the power semi’s board mounted is better than running wires all over. Check for shorts to heat sink before soldering the parts into the rest of the circuit. And do all your “machine shop” work and check for fit first, before soldering anything.
And if you get a spot of white thermal grease on the baseboard, it will migrate to the ceiling in a matter of hours. Keeping it off everything (including clothes) is a fool’s errand. That’s why I prefer sil-pads (greaseless).
And if you get a spot of white thermal grease on the baseboard, it will migrate to the ceiling in a matter of hours. Keeping it off everything (including clothes) is a fool’s errand. That’s why I prefer sil-pads (greaseless).
Will find something...
Lm7809 & Lm7909 would be good regulators for this project right?
Just 1000uF between greatz and regulator?
Lm7809 & Lm7909 would be good regulators for this project right?
Just 1000uF between greatz and regulator?
Ok, would it hurt if I use positive rail also for analog part of a tuner?
I didn't measure yet, but probably less than 100mA... I would still need to drop another volt for it tho... 8v... maybe if I use 7808 seperately?
I didn't measure yet, but probably less than 100mA... I would still need to drop another volt for it tho... 8v... maybe if I use 7808 seperately?
Yes. Separately regulate the tuner. Since this is no longer going to be one nice compact integrated layout that was co-designed, you just want to minimize potential for unintended interactions.
Ok, basicly it's nothing special, just coupling on power line... but I'm tyred of ground loops & digital noises anyway. So seperated regulator it is.
Yep, that's the one. Very good tuner with i2c compared with everything else a DIYer could get. Even this one doesn't have datasheet, but one russian did the i2c analisys to get instruction bits and I found out instruction bits for mono mode.
If anyone in need of FM tuner that can be controlled with MCU, this is what I recommend.
If anyone in need of FM tuner that can be controlled with MCU, this is what I recommend.
Ofcourse:
Is 7908C by Motorolla?
Look much older than other ones...
Either way this is all I can get localy, the other store orders from Germany, but they had messed up values of components multiple times, so I backed off.
Is 7908C by Motorolla?
Look much older than other ones...
Either way this is all I can get localy, the other store orders from Germany, but they had messed up values of components multiple times, so I backed off.
