Hi Mikek,
Revisiting with my V-Meter prototype as shown in:
DUT = T50-2 37T #24 with 330pF C0G
Different L C components. VNWA BW Q measurement = 211 for these parts.
Peaked to VOM full scale = 1V out of fixture, AWG = 204mV
Q = 50 / .204 = 245 (3.3387 MHz peak)
3dB down = 0.7079
Best I can resolve with VOM is 0.71, measuring two frequencies;
3.3317 and 3.3456 MHz with difference = 0.0139 MHz
Q = 3.3387 / 0.0139 = 240
Nice Match!
Which then questions, which is correct VNWA BW or prototype Voltmeter
with injection transformer?
John
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On 9/17/22 9:46 AM, Mikek wrote:
Can you do a 3db Q measurement on the DUT. Set resonance a 1 unit then
raise and lower the frequency until the meter reads 0.707 and record the
frequencies.
High frequency minus low frequency = xxx then resonant frequency divided
by xxx = Q
Just wondering what the real Q is.
????????????????????? Thanks, Mikek
