4 meter T/R Relay Switches Band Pass Filter VLNA EME3-70

189,00 

A Complete Solution for 4 meter 70-70.5 MHz 1500W Transmit-Receive 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

 

Additional information

Weight 0.50 kg