Difference between revisions of "Kits and Parts Mixers"
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[[file:toroid-cw.jpg]] | [[file:toroid-cw.jpg]] | ||
| + | |||
| + | === ADE-1 Schematic === | ||
| + | |||
| + | [[file:ADE-1_Schematic.PNG]] | ||
| + | |||
| + | === Performance === | ||
| + | |||
| + | [[file:Chart_dBm-to-Volts.PNG]] | ||
| + | |||
| + | [[file:ADE-1_Performance.PNG]] | ||
| + | |||
| + | [[file:ADE-1_ElectricalSpecs.PNG]] | ||
| + | |||
| + | === Port VWSR === | ||
| + | |||
| + | * Measured VSWR of 2.23 at 9 MHz with NanoVNA matches spec nicely | ||
| + | |||
| + | [[file:ADE-1_LO_VSWR.PNG]] | ||
| + | |||
| + | [[file:ADE-1_IF_VSWR.PNG]] | ||
| + | |||
| + | [[file:ADE-1_RF_VSWR.PNG]] | ||
== Kits and Parts Diode Mixer == | == Kits and Parts Diode Mixer == | ||
| Line 62: | Line 84: | ||
<video type="youtube">zOk_0IiIgZY</video> | <video type="youtube">zOk_0IiIgZY</video> | ||
| + | |||
| + | == Measurements == | ||
| + | |||
| + | * NanoVNA | ||
| + | * No RF in | ||
| + | * LO driven be NanoVNA Tx | ||
| + | * IF output to NanoVNA Rx | ||
| + | * IF at 9 MHz | ||
| + | ** VSWR: 2.233 | ||
| + | ** S21 Gain: -67 dB | ||
| + | |||
| + | [[file:ADE-1.NanoVNA_LO-to-IF.png]] | ||
== Videos == | == Videos == | ||
<video type="youtube">GvadQpkZ8l0</video> | <video type="youtube">GvadQpkZ8l0</video> | ||
| + | |||
| + | <video type="youtube">Mm7WfVzr1ao</video> | ||
Revision as of 09:16, 1 October 2021
Contents
Kits and Parts Mixers Features in Common
- All Ports are 50Ω
- +7dBm Local Oscillator Injection Design
- Full Diplexer at the IF Port
- Optional Attenuators for RF & LO Ports
- Available as bare PCB or kit of parts
My Typical Applications
- 7 MHz RF, 40 M band
- 16 MHz LO
- Si5351A square wave drive, 50 Ohm source impedance, 1.65V peak
- 9 MHz IF feeds Crystal Filter
Kits and Parts ADE-1 Mixer
- Kits and Parts Mixer
- Build and tune diplexer first
Toroid Winding Direction
- Toroids needs to be wound to match the pad locations/offsets on the PCB
ADE-1 Schematic
Performance
Port VWSR
- Measured VSWR of 2.23 at 9 MHz with NanoVNA matches spec nicely
Kits and Parts Diode Mixer
- Double Balanced Diode Ring Mixer Kit
- Build and tune diplexer first
Bridged Tee Diplexer
Diplexor is a bandpass/band-stop filter popularized by Joe Reisert W1JR that is used after a double Balanced Mixer to provide a 50 ohm termination to all frequencies at the mixer's IF port, and to the following amplifier stage. Maintaining a consistent load at the mixer avoids overload and Inter-Modulation Distortion (IMD) effects that these mixers are prone to when not properly terminated.
LTSpice simulation
- 9 MHz
- FT37-67, 20T-12" = 8 uH
- T37-17, 13T-10" = 250 nH
- C2 adjusts peak from left to right
Measurements
- NanoVNA
- No RF in
- LO driven be NanoVNA Tx
- IF output to NanoVNA Rx
- IF at 9 MHz
- VSWR: 2.233
- S21 Gain: -67 dB
Videos
