MFJ-8504HP2, HIGH PASS MODULE FOR 8504, 1.7 MHz Type_1.6 HF LOOP Has huge 3" Cross-needle meter

Has huge 3" Cross-needle meter

and triangular waveforms from 1Hz to 1 MHz in 6 decade ranges

5 dBi gain on 440 MHz

Hang and Play

Couple it with an MFJ-341S (SO-239)

MFJ-8504HP2, HIGH PASS MODULE FOR 8504, 1.7 MHz Type_1.6 HF LOOP Has huge 3" Cross-needle meterAdd a 1. 7 MHz High pass filter to your MFJ 8504B, MFJ 8504S, MFJ 8504NB or MFJ 8504NS. MFJ 8504 Products MFJ 8504AN Add an AM Notch filter to your MFJ 8504B and MFJ 8504S $44. 95 MFJ 8504B Like MFJ 8504NB but without the Notch Filter $169. 95 MFJ 8504HP1 Add a 30 MHz high pass Module to the 8504 $29. 95 MFJ 8504HP2 Add a 1. 7 MHz high pass Module to the 8504 $29. 95 MFJ 8504LP Low Pass Module for 8504 $29. 95 MFJ 8504NB SDR RECEIVER MULTI COUPLER, W