Thanks all for the detailed replies. I learned a lot just by reading the replies and understand the difference between probes and test leads now
Thanks JimB for the photos - look quite well organized
One more question, I have another frequency counter (GFC-8055G) that counts up to 550MHz. There are 2 input sockets, clearly marked as
(1) Input A, 1MOhm, 0.1-100MHz
(2) Input B, 50Ohm, 50MHz-550MHz
Currently I am using Input A with my oscilloscope probe to measure outputs of the frequency counter and the results look fine. If I am to use input B to measure higher frequencies (for example, the output of audioguru FM transmitter), can I still use the oscilloscope "probe"? Or do I need to modify it to allow proper impedance matching like MrAl suggests?