4 meter BPF VLNA and relay Switches 1500 W EME2-70
A Complete Solution for 70-70.5 MHz 1500W Transmit-Receive 4 meter Competition System with Low Loss Receive Band Pass Filter and Preamplifier: EME2-70
QRO - Extreme power on transmit and low noise on receive with integrated band-pass filter.
QRO made on low loss dielectric RT/duroid® 5880 Laminates (not on FR4 Important!).
EME2-70 device consists of three components:
1. 70 - 70.5 MHz High Selectivity, High Q, Low Loss RX Bandpass Filter. Specially designed to suppress HF, 50MHz, FM and 2m signals. Its characteristic is shown in the following graph. The filter itself has an extremely low attenuation of only 0.12 dB:
3. Double High Power Relays with 16A contacts.
Receive gain:
| Frequency: | Gain: |
| 1.82 MHz | < - 65 dB |
| 7.1 MHz | < - 65 dB |
| 14 MHz | < - 63dB |
| 21 MHz | < - 50 dB |
| 28 MHz | < - 43 dB |
| 50 MHz | < - 17 dB |
| 70 MHz | +20 dB, NF= 0.8 dB, Input RL= -15dB, IP3out >36dBm |
| 70.5 MHz | +20 dB, NF= 0.8 dB, Input RL= -15dB, IP3out >36dBm |
| 88 MHz | < - 11.8 dB |
| 98 MHz | < - 27 dB |
| 108 MHz | < - 26 dB |
| 144 MHz | < - 26 dB |
| 222 MHz | < - 26 dB |
| 432 MHz | < - 19.5 dB |
The characteristics of Receiving Gain can be seen in the following graphs:
- HF Attenuation:
- 50 MHz Attenuation:
- Attenuation of 144 MHz (2 meter band) and 222 MHz:
Transmitting Output Return Loss (Measured):
| Frequency: | Attenuation: | Return Loss: |
| 65 MHz | 0.02 dB | 30 dB |
| 68 MHz | 0.02 dB | 40 dB |
| 70 MHz | 0.015 dB | 50+ dB |
| 70.5 MHz | 0.015 dB | 50+ dB |
| 76 MHz | 0.02 dB | 30 dB |
The characteristics of Transmitting Output Return Loss can be seen in the following graph:
Extreme Low Loss on transmit side thanks to RT/duroid® 5880 Laminate. Less than 0.03 dB.
With Excellent Wide-band Return Loss 70 - 75 MHz. Better than 50 dB.
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.
- Product Code: 6840
- Availability: In Stock
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219.00€
Tags: 70MHz, 70.5MHz, 4meters, BandPass, Filter, BPF, EME2-70, PGA-103+, Preamplifier, Relay, QRO, Low Noise, VLNA