Mini Heterodyne

[chongmagic]

Can we get the chip voltages for the mini heterodyne. My 1072 is showing about 7.5 to 8 on all four pins and that cant be right.

I tried the drag and drop method but I am not seeing and solder bridges on the pins.

 

[Robert]

I'll crack mine open today and take some measurements.

 

[chongmagic]

Thank you, was just thinking should it be around the same as the Super Hererodyne?

 

[Robert]

Yep, I would assume all the voltages should be basically the same.

 

[Robert]

TL072
1 - 4.44
2 - 4.44
3 - 4.43
4 - 0
5 - 4.06
6 - 4.44
7 - 4.44
8 - 8.92

 

[chongmagic]

Yeah mine is definitely screwed. I probably burned it up I am getting around 8 on all the pins I tested.

My SMD soldering skills are abysmal at best.

New item by Jonathan Freeman (Chongmagic)

photos.app.goo.gl

It looks like I didn't solder pins 12 -15 on the CD4046B but I doubt that would cause the variance in the TL072 voltages.

 

[chongmagic]

I will start a new post in troubleshooting.