EME199 Series Filter Kits
 BPF9-1M8-75M 9th order 1.8 to 75MHz Bandpass Filter
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The Mini-Kits EME199 PC Board has been designed for constructing simple filters using SMD components, and fits into a Hammond 1590A enclosure. Kit part numbers are prefixed for filter type, ( LPF Low Pass, BPF Band Pass or HPF High Pass ), the number after is the filter order, followed by the band or frequency in MHz. These filters are easy to construct, and require minimal alignment if constructed as per the Kit notes.
Please Note: These filters are designed for receiver applications only and are not designed for transmitting power over +20dBm 100mW through. Many older Transceivers has a receiver loop through on the back panel that can be used to connect to external filters.
1/ There are no current alerts.
The BPF9-1M8-75M consists of 9th order 1.8MHz high pass, and 75MHz low pass filters, and has been designed to protect HF receivers from overload or inter modulation caused by very high AM and FM broadcast band signals. The filter uses a number of SMD components that are easily fitted to the board. The filter essentially is no tune, and no alignment or test equipment is required. The filter is ideal for many low cost SDR receivers that suffer for overload.
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Top view of the 9th Order 1.8 to 88MHz Band Pass Filter.
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The above plot shows the s21 through loss and S11 return loss of the 1.8MHz High pass filter from 0.1 to 3MHz
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The above plot shows the s21 through loss and S11 return loss of the BPF9-1M8-75M Filter from 0.5 to 150MHz
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The above plot shows the s21 through loss and S11 return loss of the 75MHz Low Pass Filter from 50 to 150MHz.
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The above plot shows the AM broadcast band signals without the filter installed
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The above plot shows the AM broadcast band with the filter installed
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The above plot shows the FM broadcast band signals without the filter installed.
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The above plot shows the FM broadcast band with the filter installed.
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Refer to the EME164 Kit webpage
1/ There are no changes to these Kits