MeoW: Difference between revisions
Jump to navigation
Jump to search
(→LPF) |
(→LPF) |
||
| Line 41: | Line 41: | ||
uH=(AL*(Giri^2))/1000 | uH=(AL*(Giri^2))/1000 | ||
Giri=sqrt(uH/AL) | Giri=sqrt((uH*1000)/AL) | ||
{|style="color:blue; background-color:#eeeeee;" cellpadding="10" cellspacing="0" border="1" | {|style="color:blue; background-color:#eeeeee;" cellpadding="10" cellspacing="0" border="1" | ||
Revision as of 23:11, 12 March 2017
Transmettitore ad onde medie
Specifiche
- prezzo <= 50 euro
- potenza >= 50 W
- senza assemblaggi SMD
Sezioni
Scheda madre
- Filtraggio alimentazione
Pretrattamento audio
- equalizzazione
- led overdrive
uC controllo
DDS
- http://www.ebay.it/itm/AD9850-Module-DDS-Signal-Generator-Module-0-40-MHz-2-Sine-Square-Wave-Output/121813761678
- https://www.aliexpress.com/item/New-AD9850-DDS-Signal-Generator-Module-0-40MHz-Test-Equipment/32328648512.html che espone il piedino 12 (Rset)
controllato da Ondeggiatore
PA
- in kit https://www.aliexpress.com/item/New-45W-SSB-linear-Power-Amplifier-Kits-With-low-pass-filter-for-transceiver-Radio-HF-FM/32574683152.html - 45W, 12-15v
LPF
Induttanze in materiale 2:
- T50-2 AL=4.9
- T68-2 AL=5.7
uH=(AL*(Giri^2))/1000
Giri=sqrt((uH*1000)/AL)
| Freq | C1 | L2 | C3 | L4/C4 | C5 | L6 | C7 |
| 1000 | 2986 | 9,377 | 4556 | 8,516/680 | 4556 | 9,377 | 2986 |
| 1500 | 1990 | 6,25 | 3037 | 5,44/453 | 3037 | 6,25 | 1990 |
| 500 | 5972 | 18,754 | 9112 | 17/1360 | 9112 | 18,754 | 5972 |
Pretrattamento audio
letture