coil generator : tester of coils

[6666]

The output voltage remains practically constant when the supply voltage varies from 3.5 to 15 V

You are building an LC RF oscillator what do you connect to such a circuit ?

[MartyJ1963]

I'd like to build this circuit and was wondering what voltage I needed to power it and what do I connect the output to? Sorry if these questions sound silly,,,I'm still learning. Thanks in advance. Marty

[kt315]

b&w pic

[kt315]

yes. i did the board for '2#' column from the table, '2N3904 2N3906'. that means you can take any of them from column, or almost any.
for example, soldered 9014s, 'asiatics'. take them from chinese made boards.

[Tibuck19]

Are those transistors and resistors you used from recycled Electronics ? Keeping true to KT ways? Looking good so far.

[kt315]

[kt315]

[6666]

It will be interesting to see what transistors you choose and if a PI coil will oscillate with out C1.

[kt315]

received the boards batch. have to solder and test.

[kt315]

ahaha! look on my screen

[Tibuck19]

good for all tipe coils - vlf ib bfo pi etc.

Great when are you getting these little boards made ?

[kt315]

good for all tipe coils - vlf ib bfo pi etc.

[Tibuck19]

Good for VLF or IB coils also ???

[dbanner]

No couldn't be. Looks like they measured using caps values from schematic unless coils have internal caps.

[dbanner]

Yes I see. Russian guys are very smart.
Now with coil generator circuit, I can be smart too.
All Now I have resonance frequency of both tx and Rx, checking one at a time.
The cibola tx is very high.
We're these measurements taken with C1 50 pF?