Robuta

https://www.korg.com/nz/news/2014/051202/
Adding a Band-Pass Filter to the Korg MS-20 Mini
band pass filternewsaddingkorgms
https://www.tindie.com/products/gpio/1575-mhz-gps-l1-band-pass-filter-w-bias-tee-33v/
1575 MHz GPS L1 Band Pass Filter w/ BIAS-TEE +3.3V from GPIO Labs on Tindie
band pass filterbias teemhzgpsw