4m Transmit - Receive Relay Switches Band Pass Filter VLNA EME3-70 1500W

  • 4m Transmit - Receive Relay Switches Band Pass Filter VLNA EME3-70 1500W

A Complete Solution for 70-70.5 MHz 1500W Transmit-Receive 4m Competition System with Low Loss Receive Band Pass Filter and Preamplifier EME3-70

QRO - Extreme power on transmit and low noise on receive with integrated band-pass filter. Version for split RX.

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

70-70.5MHz Transmit/Receiving Relay Switches with Band-Pass Filter Low Noise Preamplifier EME3-70

EME3-70 device consists of three components:
1. 70-70.5MHz High Selectivity, High Q, Low Loss RX Bandpass Filter. Specially designed to suppress HF, 50MHz, FM and 2m signals
3. . Double High Power Relays with 16A contacts.

Receive gain:
Frequency: Gain:
1.82 MHz < - 100 dB
7.1 MHz < - 80 dB
14 MHz < - 52 dB
21 MHz < - 42 dB
28 MHz < - 32 dB
50 MHz < - 6 dB
70 MHz +26 dB, NF= 0.8 dB, Input RL= -15dB, IP3out >36dBm
70.5 MHz +26 dB, NF= 0.8 dB, Input RL= -15dB, IP3out >36dBm
98 MHz < - 10 dB
108 MHz < - 37 dB
140 MHz < - 30 dB
144 MHz < - 31 dB
288 MHz < - 30 dB
432 MHz < - 48 dB
Extreme Low Loss on transmit side thanks to RT/duroid® 5880 Laminate. Less than 0.04 dB.
With Excellent Wide-band Return Loss 70 - 75 MHz. Better than -35 dB.

4m T/R Relay Switch BandPass Filter LNA EME3-70 TX Loss S11
Transmitting side of EME3-70:
Frequency: Input Return Loss (S11): Insertion Loss (S21):
70 MHz < - 35 dB 0.02 dB
70.5 MHz < -35 dB 0.02 dB
Gain -26 dB, NF= 0.8 dB, Input RL= -15dB, IP3out >36dBm

1500W Low Noise Preamplifier with Relay Switches and Band Pass Filter EME3-70 Measured Gain on 40m to 6m (7MHz to 50MHz)
EME3-70 Band Pass 4m Filter with PGA-103 Measured HF 6m attenuation
4m 1500W Transmit/Receive Relay Switches Low Noise Preamplifier Band-pass Filter EME3-70 Measured Gain 28 MHz to 144 MHz
EME3-70 Band Pass Filter VLNA PGA-103+ Measured Gain 28MHz to 144MHz
Important details:
Power consumption: + 12 V, 220 mA
Max. power SWR 1:1 1500 W
Max. power SWR 1:1.5 1000 W
Max. power SWR 1:2 750 W
Max. power SWR 1:3 500 W
Connectors: "N"
By order: 7/16 DIN
Outdoor version: +9 EUR
With this equipment, sequencer is mandatory. To switch from receiving to transmitting put on sequencer 200 ms delay.
Outdoor version with IP63 protection.

Our EME family:

6 meter band, EME2-50:EME2-50N

6 meter band, EME3-50:EME3-50

4 meter band, EME3-70: This one

2 meter band, EME2-144: EME2-144

2 meter band, EME3-144:EME3-144

EME3-70 Low Loss Bandpass Filter Low Noise Preamplifier Transmit/Receive High Power Relay Switches Block Diagram.

EME3-70 4m TR Relay Switches BPF Filter LNA EME3-70 Block Diagram


  • Product Code: 4406
  • Availability: In Stock
  • 189.00€


Tags: 70MHz, 70.5MHz, 4meters, BandPass, Filter, BPF, EME3-70, PGA-103+, Preamplifier, Relay, QRO, Low Noise, VLNA