Schematic of Step Attenuator
- Details
- Category: Radio System
- Published: Sunday, 14 April 2019 21:46
- Hits: 11604
Searched online to find some schematics of step attenuators and then edited schematic into QUCS.
Simulator result
DB
| Volts | Expected DB | Calc DB |
| 5 | ||
| 4.46 | 1 | -0.99 |
| 3.55 | 3 | -2.97 |
| 2.52 | 6 | -5.95 |
| 1.26 | 12 | -11.97 |
| 0.403 | 22 | -21.87 |
| 0.0675 | 42 | -37.39 |
The +20 db step is off quite a bit.
Make a Programming Cable for a Yaesu FT-4X
- Details
- Category: Radio System
- Published: Sunday, 14 April 2019 20:44
- Hits: 11972
I referenced this video to modify a Baofeng cable to make a programming cable for a Yaesu FT-4X.
- Pulled 3.5 mm audio pin out of cable
- Open case at USB end of the cable gently with small screwdriver. Pry at the cable stress relief end.
- Watch this video (Yaesu FT-4X Programming Cable) and dig out the needed diode from your parts stock.
- solder it up
- Test the cable with programming software available at yaesu.com
- Reassemble the case
