EME2-432 70cm Ultimate T/R Relay Switches BPF VLNA 430-450 MHz

EME2-432 70cm Ultimate T/R Relay Switches BPF VLNA is a complete solution for 70cm competitions and EME. Frequency range 430-450MHz. The maximum power is 1200W, which also represents the maximum power that can be passed through the “N” connectors. QRO – Extreme power on transmit and low noise on receive with an integrated input band-pass filter. QRO is made on low dielectric loss RT/duroid® 5880 Laminates

 

EME2-432 70cm Ultimate T/R Relay Switches BPF VLNA Appearance:

 

EME2-432 70cm Ultimate T/R Relay Switches BPF VLNA consists of three components:

1. 70 cm 430 – 440 MHz Ultimate Receiving Bandpass Filter on the input side.
2. Wideband Low Noise Amplifier.
3. High Power High Current Relays + isolation relays.
4. By order, the Fail Safe Relay option
5. By order, integrated super high selectivity SAW filter with a bandwidth of just about 8 MHz. From 430-438 MHz

 

EME2-432 70cm Ultimate T/R Relay Switches BPF VLNA measured results:

1.82 MHz: < – 60 dB
3.80 MHz: < – 60 dB
7.1 MHz: < – 60 dB
14 MHz: < – 60 dB
28 MHz: < – 54 dB
50 MHz: < – 39 dB
70 MHz: < – 31 dB
144 MHz: < – 12 dB
148 MHz: < – 12 dB
432 MHz: +20 dB, NF= 0.68 dB, Input RL= -13dB, IP3out > 37dBm
440 MHz: +20 dB, NF= 0.68 dB, Input RL= -13dB, IP3out > 37dBm
450 MHz: +20 dB, NF= 0.68 dB, Input RL= -13dB, IP3out > 37dBm
864 MHz: < – 17 dB
1296 MHz: < – 25 dB

 

Extreme Low Loss on the transmission side thanks to RT/duroid® 5880 Laminate. About 0.13 dB.
With Excellent Wideband Return Loss 430 – 450 MHz -31 dB.

 

Transmit side of EME2-432. Measured Insertion Loss and Return Loss:

Frequency:	Input Return Loss (S11):	Insertion Loss (S21):
432 MHz	< – 31 dB	0.13 dB
440 MHz	< -31 dB	0.13 dB

Gain +20 dB, NF= 0.68 dB, Input RL= -13 dB, IP3out > 37dBm

1200 W Low Noise Preamplifier with Relay Switches and Band Pass Filter EME2-144 Measured Gain on HF 160m to 15 m

 

70 cm 1200W Transmit / Receive Relay Switches Low Noise Preamplifier Band-pass Filter EME2-144 Measured Gain 28 MHz to 144 MHz

 

432-440-450MHz Transmit/Receive (T/R) Relay Switches BPF Filter LNA EME2-432 Power 1200W Measured 6m, 2m, 70cm, Harmonic, and 23 cm Gain

Important details:
Power consumption: + 12 V, 340 mA
Max. power SWR 1:1: 1200 W
Max. power SWR 1:1.5: 800 W
Max. power SWR 1:2: 600 W
Max. power SWR 1:3: 400 W
Connectors: “N”
By order: 7/16 DIN
Outdoor version: +12 EUR
With this equipment, the sequencer is mandatory. To switch from receiving to transmitting, put on a sequencer 30ms delay.

 

Outdoor version with IP63 protection EME3-432 Outdoor:

EME2-432 Low Noise Preamplifier With Super Low Loss Band Pass Filter PGA103+ VLNA Maximal Power 1200 W Transmit Receive Relays 430-450 MHz Block Diagram.

 

How can any EME2 or EME3 for any band be properly connected to the sequencer?

Use these schematics. Quality sequencer is mandatory.

 

How does the fail-safe option work?

A fail-safe relay is the possibility of having information on whether or not EME2-432 is switched to the transmit position.
In that situation, the additional Fail Safe “FS” relay will switch to ground or not an additional line.
That information sequencer could be used to take another step in switching linear amplifiers or transceivers.

If by chance +12V is not disconnected from EME2 (receive position), the linear amplifier will not burn the preamplifier, because the sequencer will not have information that the EME2 fail-safe relay is switched.

Summary: With a fail-safe relay, a linear amplifier or transceiver will never burn the preamplifier because of any problematic situation.
It could work only if the sequencer has an input port for a fail-safe relay (line). And logic to use it.

 

Our EME2 – EME3 complete family 8m – 23cm is here.