Hi!
I bought this frequency meter https://www.ebay.com/itm/1-MHz-1-1G...936276&hash=item1a5edbde2f:g:lwQAAOSwtLtbo68a about 2 weeks ago and I still cannot figure out, how to measure LC circuits with it. I built one transistor oscillator (FM transmitter with 1 transistor) and connected meter parallel to the LC circuit. I expected frequency of around 100MHz, but it displayed only about 6MHz. Why am I asking this? I need to measure frequencies in homemade tube radio (fremodyne) and I need accurate enough (+-5%) measuring instrument. Maybe, the better way would be to make inductance meter for homemade coils, but I cannot find any simple enough circuit on the Internet - I haven't PIC or LM339 as on many schematics. Therefore, I wanted to ask for a help someone more experienced, for these questions: Is it possible to measure frequencies with this frequency meter? And if you had some simple schematic of inductance meter (10s or 100s nH), can you post it here? I tried this one https://makingcircuits.com/blog/1-5-v-inductance-meter-circuit/ but I don't think it's accurate. Any help is appreciated. Thank you for your answers!
I bought this frequency meter https://www.ebay.com/itm/1-MHz-1-1G...936276&hash=item1a5edbde2f:g:lwQAAOSwtLtbo68a about 2 weeks ago and I still cannot figure out, how to measure LC circuits with it. I built one transistor oscillator (FM transmitter with 1 transistor) and connected meter parallel to the LC circuit. I expected frequency of around 100MHz, but it displayed only about 6MHz. Why am I asking this? I need to measure frequencies in homemade tube radio (fremodyne) and I need accurate enough (+-5%) measuring instrument. Maybe, the better way would be to make inductance meter for homemade coils, but I cannot find any simple enough circuit on the Internet - I haven't PIC or LM339 as on many schematics. Therefore, I wanted to ask for a help someone more experienced, for these questions: Is it possible to measure frequencies with this frequency meter? And if you had some simple schematic of inductance meter (10s or 100s nH), can you post it here? I tried this one https://makingcircuits.com/blog/1-5-v-inductance-meter-circuit/ but I don't think it's accurate. Any help is appreciated. Thank you for your answers!