Can the cheap 20dB saw filters from AliExpress survive at 22dB
Hi,
I bought some of the Seeed Xiao nrf + wio board combos and in the data sheet it says 22dBm max power.
I live close to cell towers and need to use filters, as far as my experience shows so far with heltec devices. For the heltecs I bought expensive saw filters from a shop in Germany which support up to 28dB and have low loss.
But the Seeed nrf chips I bought for cheap optimized repeaters placed in the countryside. So no large investment wanted. I discovered cheap saw filters on AliExpress and bought some. They say max 20dB. Do any of you have experience with them? I'm sure some of you have already tested them.
Do I need to limit the repeater tx to 20 to not fry them? I know 22 is a lot more energy in mW than 20, but maybe they can manage that? I don't want to put my repeaters in hard to reach places and have them break down after 6 weeks.