Найдено 7 результатов

f6itu
16 дек 2023 17:02
Форум: International forum
Тема: Anvelina SDR transceiver by EU2AV
Ответы: 77
Просмотры: 403038

Re: Anvelina SDR transceiver by EU2AV

Hi Yuri & Luca the passive bpf filter shows approximately 3.9 dB of insertion losses @ 144 MHz and 3.6 dB at 146 MHz with approximately 1,3 dB ripple and a usable 138/148 bandwidth (It could be better tuned, but is it really necessary to spend more time on it ? ) SAW filters are not exactly efficien...
f6itu
16 дек 2023 16:59
Форум: International forum
Тема: Anvelina SDR transceiver by EU2AV
Ответы: 77
Просмотры: 403038

Re: Anvelina SDR transceiver by EU2AV

Hi Yuri & Luca the passive bpf filter shows approximately 3.9 dB of insertion losses @ 144 MHz and 3.6 dB at 146 MHz with approximately 1,3 dB ripple and a usable 138/148 bandwidth (It could be better tuned, but is it really necessary to spend more time on it ? ) SAW filters are not exactly efficien...
f6itu
04 окт 2023 11:48
Форум: International forum
Тема: Anvelina SDR transceiver by EU2AV
Ответы: 77
Просмотры: 403038

Re: Anvelina SDR transceiver by EU2AV

Hi Yuri

I have a desperately empty and useless connector on my SDR back panel :-d
vhf.png
vhf.png (839.68 КБ) 212196 просмотров
if you need a beta tester for your AFT05MP075N version of the transverter, count me in. Even a simple set of gerber files will be ok

Wish you all the best

Marc f6itu
f6itu
28 июл 2023 21:37
Форум: International forum
Тема: Anvelina SDR transceiver by EU2AV
Ответы: 77
Просмотры: 403038

Re: Anvelina SDR transceiver by EU2AV

Tnks Yuri In other words, quite a lot of good news. I'll ask Aivars if he can send me a pcb of the new release (if available) I have a small amount of AFT05MP075N in my junkbox (who could ask for more ! ) But I'm affraid you'll have to make a new release in the next future, as NXP has announced the ...
f6itu
26 июл 2023 20:11
Форум: International forum
Тема: Anvelina SDR transceiver by EU2AV
Ответы: 77
Просмотры: 403038

Re: Anvelina SDR transceiver by EU2AV

Hi Yuri

Could you please give us some news concerning the 2m transverter ?

I saw Luca's build and I must admit I'm very interested if this version is stable

VY 73'
Marc
f6itu
20 мар 2023 18:20
Форум: International forum
Тема: Anvelina SDR transceiver by EU2AV
Ответы: 77
Просмотры: 403038

Re: Anvelina SDR transceiver by EU2AV

Oh, by the way Yuri PCB release 3.5d and schematic release 3.6D, IC13 is NOT grounded. ... thus causing probable glitches in the Alexiares SPI protocol. Pin 19 and 1 ( OE1/OE2) could go high and stuck all communication with Alexiares address decoder A short strap with the closes gnd plane is advisab...
f6itu
20 мар 2023 10:11
Форум: International forum
Тема: Anvelina SDR transceiver by EU2AV
Ответы: 77
Просмотры: 403038

Re: Anvelina SDR transceiver by EU2AV

Hi all My name is Marc, slowly building an Anvelina board. ... and for this reason, I have some probably stupid questions. First of all, two notes in the schematic are a big mistery for me (as written in cyrilic alphabet) https://imgur.com/a/e6ugDud https://imgur.com/a/e6ugDud could someone translat...