USDX DUAL BAND

O dual band muda, via rele, automaticamente as bandas definidas pelo software.
A linha, no software, que define as bandas selecionadas é esta (retirando as duas barras // e setando o 14 para 7 nota somente funciona para numeros inteiros ) :

The dual band switches, via the relay, automatically the bands defined by the software.
The line, in the software, that defines the selected bands is this (removing the two slashes // and setting the 14 to 7 note only works for integer numbers):

//#define LPF_SWITCHING_PE1DDA_USDXDUO           14  // Enable 2-band filter bank switching: non-latching relay  wired to pin PD5 (pin 11); specify as value the frequency in MHz for which (and above) the relay should be altered (e.g. put 14 to enable the relay at 14MHz and above to use the 20m LPF).

Versão W do software (autor PE1NZZ Guido) com alterações para operar em 40 e 80m INOzip ou HEXzip

W version of the software (author PE1NZZ Guido) with changes to operate on 40 and 80m INOzip or HEXzip

Esquema :
Schematic :


PCB layout


A PCB, aproveitando a oferta de confecção de PCBs de 10x10cm,  traz junto outras duas PCBs para um adaptador de soquete do 74HC4053 para FST3253 TSSOP ou SSOP, mais as PCBs de LPF 40 e 80m, alem das de PA com BS170 ou 2N7000 ainda do amplificador de audio (opcional) e do amplificador de RF (para sinais acima de 20m).

The PCB, taking advantage of the offer to manufacture 10x10cm PCBs, brings together another two PCBs for a socket adapter from 74HC4053 to FST3253 TSSOP or SSOP, plus PCBs from LPF 40 and 80m, in addition to the PA PCBs with BS170 or 2N7000 audio amplifier (optional) and RF amplifier (for signals over 20m).

PCB total


PCB cortada
PCB cut


PCB montada
PCB assembled

Arquivo GERBER da PCB total

Total PCB GERBER file

Para maiores informações veja em :
For more information, see:
step by step
and
my USDX

73 from py2ohh miguel