Radioddity LPFX7 User Manual
Radioddity LPFX7 Low Pass Filter is mainly used to suppress transmitter
harmonics during transmission and reception. It also provides some pre-
selection filtering on receive.
Warning
1. The filter is designed for the PAX-100 and achieves the best performance with it.
2. When used with other radios or devices, slight degradation of performance can be
expected.
3. Working Voltage: 13.8V | Working Current: 0.1- 0.5A
4. Maximum Input Power: 100W for CW, 200W for SSB. Exceeding the rated power
levels may cause damage to the filter.
5. Frequency Range
：
10M
、
15M
、
20M
、
40M
、
80M
6. Harmonic suppression
：
10M & 15M
、
20M
、
40M
＞
30db
80M
＞
51db
Operating Guidance
1. Install the filter using the manual. Connection sequence is: G90 to PAX100 to LPFX7
to Antenna. DC power supply: Set the DC voltage to 13.8V output and the maximum
current needs to be 20A. Current draw for the filter is under 500ma.
Note: The power cord of LPFX7 can be directly connected to the power cord of G90. Pay
attention to the positive and negative poles. Remember your PTT keying line cord from
the G90 to PAX100.
2. Power on in the following order: (PAX100 already connected to DC supply)
Turn on the DC power supply - Turn on G90 (PAX100 will work automatically) - Turn on
LPFX7
3. Power and frequency setting
①
Set the output power of G90 from is 2-10W
②
Set the transmission and reception frequency of G90
③
Select the working frequency band of LPFX7 according to the G90 frequency.
Note: Please set the filter according to the band used on the G90. A mis-match between
the G90 operating band and the filter band selected could cause damage to the filter.
