HP 778D Dual Directional Coupler - Tear Down
In this video I take a look at a 778D Dual Directional Coupler that was part of a lot I won at auction - I really wanted 1 but ended up with 6 - 3 of which didn't pass manufacturer perf test - So I thought I'd take it apart and have a look inside. The Standing Wave Video can be found here • AT&T Archives: Similiarities of Wave Behav... - Go watch it, it's awesome.
▶︎
#1470 Using RF Couplers for Return Loss Measurment
▶︎
#158: Directional Coupler Basics & how to sweep SWR of an antenna | Return Loss | VSWR
▶︎
#1478 RF Coupler Construction
▶︎
The Truth about SWR: Debunking the Myths and Misunderstandings
▶︎
HP 437B Power Meter with HP 8481A and HP 8484A Power Sensors
▶︎
TSP #293 - High-Voltage Amplification, Signal Generation, Power Supply Design Tutorial & Experiments
▶︎
Once You Understand it, You Will Think Everything Else is Silly - Toyota E-CVT
▶︎
The Insane Genius of a Formula 1 Gearbox
▶︎
#1366 RF Bridge
▶︎
HP 54845A Oscilloscope Repair - Part 1
▶︎
#196: How a Directional Coupler in an SWR meter works
▶︎
Electricity Does Not "Split" H₂O. And That's VERY Useful.
▶︎
QST Wattmeter - Part 1
▶︎
RF and Microwave PCB Design - Part 5: Couplers
▶︎
2kW Directional Coupler for LDMOS Amlifiers
▶︎
Measuring Return Loss and SWR with a HP 415E, HP 778D or HP 8470B
▶︎
Understanding Transformer Testing
▶︎
HP 8663A First Look
▶︎