Filter, diplexer, duplexer and Bias-T's
A 869.4MHz bandpass filter for MESHTASTIC
Oct. 9th 2024
Retuning a UHF Bandpass Filter to 744.5 MHz as IF RX filter for QO-100
Sept. 1st 2024
Be careful with cheap 88-108 MHz band reject filters
July 7th 2024
MITEQ interdigital bandpass filter FIL-1400-4012 optimized for 1420MHz radioastronomy observations
May 3rd 2024
L-band bandpass filter from RLC retuned to 1690MHz for weather satellite downlink
May 2nd 2024
Analysis of a Chinese 10Mhz - 10GHZ Bias-T
April 23rd 2024
Analysis of an unknown Bias-T for the HF-Bands
April 17th 2024
A 4 pole bandpass filter for the 70cm band recycled from a UHF duplexer
April 12th 2024
Building some new Bias-Ts
April 2nd 2024
A 868MHz bandpass filter K&L Microwave 10B120-865/530-0
May 3rd 2022
A 868MHz bandpass filter for LORAWAN
Mar. 31st 2022
Characterization of the LNB Bias-T and reference injection board by G0MJW
May 9th 2021
Filtronic 3800 MHz lowpass filter SL013
Dec. 14th 2020
13cm bandpass filter from SSB-Electronic for QO-100
Nov. 9th 2020
3 pole UHF bandpass filter from R&S retuned to 435 MHz
Nov. 6th 2020
Surplus filter from NEC retuned from 5731MHz to 5761MHz
Sept. 9th 2020
How well works a K&L 1990 MHz lowpass filter in the 13cm band ?
Aug. 20th 2020
A surplus 4 pole S-band filter modified and retuned to 2320 MHz
Aug. 19th 2020
A 739MHz bandpass filter for the IF of a QO-100 receiver
Aug. 18th 2020
A surplus 4 pole S-band filter modified and retuned to 2400 MHz
Aug. 15th 2020
Diplexer for 23cm and 13cm band
Feb. 3rd 2020
1296 MHz lowpass filter with harmonic notches and integrated reflectometer
Feb. 2nd 2020
Commercial 2300-2400 MHz band-pass filter retuned for QO-100 uplink at 2400-2410 MHz
Jan. 30th 2020
120MHz high pass filter K&L 6LH41-120-2000-0-0
Nov. 18th 2019
4.3-5.0 GHz bandpass filter from surplus BOSCH filter unit
Nov. 17th 2019
Using a Kathrein 791 145 Dual-Band Combiner as a UHF/SHF Diplexer
Sept. 27th 2019
MITEQ FTL-104052 BPF retuned from 2240 MHz to 2350 MHz
Aug. 5th 2019
Homebrew 2.4 GHz 5 pole BPF for QO-10
Aug. 4th 2019
Homebrew 2.4 GHz 4 pole BPF for QO-10
Bandpassfilter RTX COH2438.75 for 2400 MHz uplink to QO-100
Mar. 31st 2019
Analysis of the 10 MHz Inserter / Extractor from Global Communicatons
Jan. 5th 2019
What's inside the 5.5 GHz high-pass filter HPF5500M
Jan. 4th 2019
Analysis of a chinese broadband Bias-T 10 MHz to 6 GHz
Sept. 1st 2018
Description of the LTE Blocking Filter 67510
April 23rd 2018
Retuning a Microdyne Tubular BPF to 2200-2300 MHz
Feb. 25th 2018
Description of Huber + Suhner Lowpass Filter 2500 MHz
Jan. 29th 2018
Analysis of the 5.4 GHz Diplex-Filter M00090-01-06 from Elettronica Roma
Jan. 26th 2018
Description of the Fixed Bandpass Filter 612608-001 from Watkins Johnson
Dec. 20th 2017
Description of K&L Bandpass Filter 5B120-2450/180-O/OP
Nov. 24th 2017
Commercial L-Band dielectrical bandpass-filter from Lorch
Nov.21st 2017
Description of Huber + Suhner Lowpass Filter 2600 MHz
July 18th 2017
Description of K&L Lowpass Filter 13IL10-1920/X2200-N/N
Description of K&L Highpass Filter 11SH10-2400/U13000-N/N
Description of the tunable bandpass filter Telonics TTA-1500-3-5EE
Jan 10th 2015
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