uSDX now goes multi band

multiband capability on my V1.02 PCB uSDX HF Transceiver

All credits to BARBAROS ASUROGLU , check his site for components for each band and more info !!

you need the transceiver PCB

Serial Resonance LPF Tri Band Module" Band dependent components list in the attached document

Please visit the author page for more info!

The band dependent capacitor and toroid turn values can be grabbed from the relevant table below.

RF IN switch and ANT switch has 3 positions marked as 1, 2 and 3. These correspond to 3 bands. The bands are marked with Band1, Band2 or Band3 with “:” to label the relevant band.

These band switches are soldered on solder side of the pcb as in the photo.

All the toroids and capacitors for example for band 1 has labels as C1-1 which means that band 1 capacitor 1. So is the toroids for example for band 1: L1-1 meaning L1 of band 1.

For slide switches I used these ones from Digikey:

https://www.digikey.com/en/products/detail/e-switch/EG2301A/301966?s=N4IgTCBcDaIKIHECMBOALGgtAOQCIgF0BfIA

Digikey code: EG1944-ND EG2301A Switch SLIDE DP3T 200MA 30V

This is important:

When switching bands both slide switches should be in the same position meaning that if we want to switch to band 1 then both RF IN switch and ANT switch should be in position 1. If not then you can smoke your BS170 PA mosfets!!!

Also make sure that you are switching to a band which is selected in uSDX screen not to a different band!

Please visit the author page for more info!