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RX Audite VHF (6/4m)

RX Audite VHF (6/4m)

This is a unique device for 6 and 4m combining RX splitter, TX switch, RX protection, low and high pass filter and low noise preamp.

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308.55 € (tax incl.)

308.55 €
255.00 € (without tax)

in stock, shipped in 2-3 days

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The lowest price in the 30 last days was 308.55 €

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Description

This is a unique device combining RX splitter, TX switch, RX protection, low and high pass filter and low noise preamp. You can split your main TX/RX antenna into two receivers or use RX AUDITE VHF to split your Dual Band (6+4m) antenna into two RX - one at 6m and second at 4m. Both of these receivers have an RF limiter in the path to limit the maximum signal level and protect them.

This is the ideal solution for monitoring both 6 and 4m bands using one dual band Yagi antenna. However, you can also use it on one band and monitor, for example, both FT8 bands (50,313 and 50,323), or monitor the analog segment (beacons) and the FT8 one at the same time. This allows better monitoring of propagation conditions. RX AUDITE VHF also includes LNA and bandpass filters to limit signals from HF and FM BC transmitters.

When RX AUDITE VHF is off, the signal from the main TX/RX antenna passes through to the SDR output. Here it is possible to have WEB SDR, FT8 skimmer etc. connected. In addition the signal passes through RF limiter, RF filters and it is possible to turn on LNA to increase gain and reduce Noise Figure. You can switch ON preamplifier even you left controller OFF by the POWER switch. LNA has got variable gain – you can set gain from 0 to typ. 20dB.

When the controller is ON, Main TX/RX antenna is shared between TRX and SDR outputs. During TXing, the SDR RX output can be connected to the internal dummy load or to the INBAND RX antenna input. You can switch the SDR RX output to the INBAND RX ANT port not only while the TRX is transmitting, but by the front panel switch, it can be switched all time.

Application

6 and/or 4m RX splitter
Monitoring both FT8 segments at 6m
Dual band antenna splitter to 6 and 4m
Web SDR and skimmer
RX protections
Low Noise Preamp and filters

Main functions

Frequency range: 48 to 75 MHz
Main TX/RX ANT splitter to two RX
Low Noise Preamp
Low and High pass filters
RX RF limiter protections for both RX outputs
High voltage and current protections at both RX outputs
RX ANT (INBAND) input - works only for SDR output
TX-RX switch controlled by the PTT
Designed for 2nd RX, WEB-SDR, SKIMMER or Panadapter
Controller OFF = TX/RX ANT port to SDR RX out via RF limiter protections - Skimmer/web-SDR
Controller ON = TX/RX ANT port splitted to TRX and SDR RX out via RF limiter protections
TRX TX to main TX/RX ANT = SDR RX out to dummy load or INBAND RX ANT input via RF limiter protections - see jumper switch
Front panel Switch - SDR RX output to RX ANT (INBAND) during transmitting or all time
Very high isolation when TRX transmitting and SDR goes to RX ANT (INBAND) typ. 78 dB @ 50 MHz and 75 dB @70 MHz
DC plug included
Preamplifier could be ON for SDR even controller is OFF
Please, see also Frequently Asked Questions - FAQ
ASSEMBLED and TESTED VERSION

ONE black box but many different parts inside

TX/RX switch controlled by PTT signal
PTT splitter (IN/OUT) in sniffer mode (IN directly to OUT) or output PTT FET switch - image
2-way RX splitter with low loss
2x RF limiter RX protections - the best on the market :)
RX switch for RX ANT (INBAND) (only for SDR output) - settings
Low and High pass filters (against HF and FM BC)
RX preamplifier (high IP3, 25 dB gain) with variable ATT - manual link
RX lines with High Voltage protections > 60 V AC
RX lines with SuperFuse current protections > 100 mA
Very high isolation TX to SDR, between RX output ports, INBAND RX and TX/RX ANT port

Parameters

Frequency range: 48 to 75 MHz (6 and 4m)
Supply voltage DC + 12 to 14 V (13.8 V recommended)
Supply current DC max. 0.7 A with preamp
Maximal TX power 150 W, recommended 100 W
LNA (PGA-103+): gain typ. 20 dB
Noise Figure with LNA: typ. 1.1 @ 50 MHz, 1.3 @ 70 MHz*
Filters: typ. -37 dB @ 28 MHz, -35 dB @ 99 MHz (LNA ON)
Very high isolation when TRX transmitting and SDR goes to RX ANT (INBAND) typ. 78 dB @ 50 MHz and 75 dB @ 70 MHz
PTT IN open PTT = RX, GND = transmitting
PTT OUT sniffer (IN = OUT) or output FET (max. 35V DC and 0.5 A) - image
PTT is not designed for QSK but you can use with right PTT lead/tail/TX delay time: min. 20/20 ms
Default configuration SDR to the internal dummy while TRX transmitting - settings
Low insertion TX loss typ. Less than 0.15 dB
RF connectors: N and SMA female
* include band filters and RF limiter

RF limiters

Limiter for RF signal to max. + 13 dBm = 20 mW @ 50 Ohm
Current SuperFuse - the only at market
Can survive high input power (current) for long time
The soft clipping reduces the IMD products of a classic hard diode clip limiter

Internal Low Noise Preamp

High IP3 preamplifier module with 25 dB gain
With PGA-103+
Low Noise Figure (NF) < 1 dB (70 MHz)
Filters: typ. -37 dB @ 28 MHz, -35 dB @ 99 MHz (LNA ON)
Variable gain by output ATT
Bypass relays
Could be switched ON even the controller has got power switch OFF - preamp for SDR output

Available as

ASSEMBLED: preamp version - ready to use

RECOMMENDATIONS TO BUY:

Included in package

Audite switch assembled and tested
DC plug - image

Manual

If you want to know more please check our wiki with RX Audite VHF manual.

TIP: You can use RX AUDITE with one RX. Switching the SDR RX to INB RX ANT switch disconnects the internal 2-way splitter and the signal from the antenna goes directly to the TRX. In the path is included RF limiter, bandpass filters and LNA. This increases the gain by 3dB.

example 1: Dual watch at 6m

- You can watch one segment at TRX and second at SDR. For example SSB DX window at TRX and 50.313 MHz FT8 at SDR. This can help you to check DC propagation. This example also allows you to watch both FT8 segments: 50.313 and 50.323.

example 2: Dual watch at 6m and 4m

- You can share one dual band Yagi antenna into 6m a one RX and 4m into a second one. You can monitor FT8 segments at 6 and 4m.

⚠ You can use OPTIONAL INBAND ANT for SDR RX while the TRX is transmitting. This could work only when the antennas have got good isolation or the INBAND antenna is single band or have a BPF. For example you are able to TX at 6m and SDR can RX 4m from INBAND RX ANT during that time.

example 3: Two SDR RX - WEB SDR, skimmer SDR TRX