EME3-144 Band-Pass Filter Preamplifier and T/R Relay 1500 W


2 meter 144MHz – 148MHz Low Loss Band Pass Filter with PGA-103+ Low Noise Preamplifier and 1.5 kW QRO Transmit-Receive Relay EME3-144

In the box embedded super low loss bandpass filterlow noise pre-amplifier with PGA-103+ and QRO relay.

QRO made on low dielectric loss RT/duroid® 5880 Laminates (not on FR4 Important!). 



This combination consists of three devices:
Receive gain:
1.8 MHz < -77 dB
3.8 MHz < -81 dB
7.1 MHz < -81 dB
14.15 MHz = -75 dB
21.2 MHz = -67 dB
28.4 MHz = – 51 dB
50 MHz = -38 dB
70 MHz = -27 dB
88 MHz= -17 dB
144 – 148 MHz = +25 dB, NF=0.7 dB, Input RL -11dB, IP3out > 37 dBm
288 MHz = -30 dB
296 MHz = -31 dB
432.1 MHz = -22 dB
440 MHz = -20 dB
Power consumption +12 V, 220 mA
Input RL: <= -37 dB, Insertion loss: 0.04 dB
Maximum power input at SWR: 
1:1 = 1500 W; 1:1.5 = 1000 W; 1:2 = 750 W; 1:3 = 500 W


EME3 2m High Selectivity, High Q, Low Loss Bandpass Filter with PGA-103+ Very Low Noise Preamplifier and 1500W T/R Relay Schematic


Energised on receive (+12V). 0V Transmit.
Versions of product:
1. With “N” connectors. Listed price.
2. With 7/16 DIN Antenna and TX OUT connector. “N” connector on RX OUT. Listed price + 30 EUR


Outdoor version:
All the options above can be made for Outdoor mounting and it is + 9 EUR. For that you will receive:
1. EME 3 144 – 148 MHz High selectivity, High Q, Low Loss Band-pass Filter with PGA-103+ VLNA and Transmit / Receive Relay.
2. Special “Plastic Box – DB” with IP63 standard (Resistant to Rain, Wind and UV)

3. Mast mounting clamp for plastic boxes. U-Bolt with serrated saddle for up to 50 mm pipe.

Measured data on the assembled filter with HP8753ES network analyzer full 2-port calibrated:


144-148MHz EME Low Loss Bandpass Filter with PGA-103+ Preamplifier 1500W T/R Relay S21




EME 3 Band Pass filter with PGA103+ Preamplifier and T/R relay Measured HF




144MHz – 148MHz Low Loss Bandpass Filter For EME with PGA-103+ Preamplifier 1k5 T/R Relay Measured Attenuation 70MHz and FM 88-108MHz


2m Low Loss Bandpass EME Filter with PGA-103+ Preamplifier 1500W T/R Relay Measured Attenuation Harmonics


2m Low loss band pass filter with PGA-103+ preamplifier 1500W T/R relay measured insertion loss and return loss on transmit side.
2m Low Loss Bandpass Filter with PGA-103+ Preamplifier 1k5 T/R Relay Measured Insertion Loss


EME 3 Transmit contacts isolation.
2m Low Loss Bandpass Filter with PGA-103+ Preamplifier 1k5 Relay Measured Transmit Isolation


EME3 2m Low Loss Bandpass Filter PGA-103+ Preamplifier 1500W Transmit Receive Relay

Designed to be used with transceivers with separate RX antenna input connector.


Our EME – Earth-Moon-Earth famil. Band-Pass filters + Amplifiers + High Power Relays

6 meter band, EME2 – 50: EME2-50

6 meter band, EME3 – 50: EME3-50

4 meter band, EME2-70: EME2-70

4 meter band, EME3-70: EME3-70

2 meter band, EME2-144: EME2-144

2 meter band, EME3-144: This one.

70 cm band, EME2-432: Soon

70 cm band, EME3-432: Soon



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