Multus SDR, LLC.

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Band and Antenna Switching Output Ports
$24.95
Proficio Transceiver Enclosure Panels
$19.49
5W HF QRP Transceiver
$425.00
S Meter Standard Reference
$24.95
Isolate USB devices
$45.00
ATU Port Expander Rev 5
The ATU Port Expander is a device that attaches to a Multus Basic or Proficio transceiver’s ATU port, interprets band data sent to it and selects a corresponding output port for the activation of relays (or other devices) such as a low pass filter relay(s). It also provides a separate output port for the activation of a two port remote antenna switch such as the MFJ-4712 (via a bias tee). Each output port is capable of sinking 350ma and has a maximum input voltage of 50V. The ATU Port Expander is well suited for driving inductive loads (relays).

Features:
*Compatible with ATU port of the Basic and Proficio transceivers.
*Six output ports (50V maximum voltage, 350ma per port).
*Rev 5 now has Mini DIN8 jack for band switching
*Separate antenna switch port.
*Port selection configuration via selection jumpers.

The ATU Port Expander is sold as a kit and contains SMT devices. A bare bones option is available that provides the PCB, programmed microprocessor and socket. A bill of material is available on our support forum.
Technical support and documentation is located at: Support:
Please do not use this website to obtain technical support. Requests for technical support via this website will not receive a response.
NOTE: These kits are produced at time of order. There is a two day lead time before shipping the kit.
Band and Antenna Switching Output Ports
$24.95
Geminus MKII 2200M and 630M Transceiver
Coming soon a redesign of the Geminus.  This version has an electronic keyer with sidetone.
$310.00
Proficio Enclosure Panels

The Proficio enclosure panels feature custom front and rear panels and cooling fan for an enclosure that may be ordered directly from a number of distributors. It is easy to assemble. 

Please choose during checkout if you want standard front panel or the MFC front panel


NOTE: This product includes only the front panel, rear panel and cooling fan.  For the enclosure, it may be obtained online from a number of suppliers.  Listed below is the part number for ordering the enclosure from Digi-Key or Mouser.  The cost is approximately $45.74 (plus shipping).  Click one of the links below to order the enclosure.

Digi-Key: HM2530-ND Enclosure
Mouser: 546-1402BV Enclosure
Hawk Electronics: 1402BV Enclosure

This reduces the lead time and cost. 

Technical support and documentation is located at: Support
Please do not use this website to obtain technical support. Requests for technical support via this website will not receive a response.
Proficio Transceiver Enclosure Panels
$19.49
Proficio MKII

The Proficio MKII is the next generation transceiver built upon the legacy of the original Proficio. With the RD16HHF1 final no longer produced we designed a whole new final built around a pair of RD06HHS2 which is an SMD device. We also wanted to incorporate some features we used to sell as optional external equipment. The MKII now has an external band switch jack for controlling filter switching on external equipment like and amplifier. Added the ability to switch an antenna. We also wanted everything within the enclosure so there aren't any unsightly fans or heat sinks hanging off the back panel. The cooling fan is temperature controlled and off when not needed.

The PSoC was moved to a separate PCB that mounts into a PCIe slot. This allows easy upgrading of the radio with new features by just plugging the new card in. The Electronic keyer is a plug in option.

The other major change was moving to PIN diodes for T/R switching. This in conjunction with our Electronic keyer option provides as close to QSK as we can get considering the slight latency on the software end. With a slight pause between words you’ll hear a responding station.

Another option is mounting an RPi4 or RPi5 inside the enclosure which, among other things, gives you the ability to remotely operate the radio.

The Proficio MKII is an all band HF (160M - 10M) transceiver with 5W output.

It has all the features of our previous transceiver:

•96kHz digital I/Q interface. No additional sound card needed. Only one USB connection is needed.

•Two tone, 2 kHz spacing, third-order dynamic range: 99 dB.

•Support for Elecraft T1 automatic antenna tuner.

•External Amplifier control via AMP port.

•External Amplifier filter control.

•External Antenna Switching.

•DG8SAQ/PE0FKO/SoftRock control interface.

•Open Source firmware.

•Firmware Field Updates via on board USB bootloader.

•Hardrock 50 control when using MSCC.

Electronic Keyer Option:

•CW Key Jack.

•PTT input Jack.

•Sidetone output.

•Sidetone Volume Knob.

Raspberry Pi Option:

•Top Cover PCB mount.

•5V Regulator.

•USB C pigtail.

With these additional features:

• All band. The Proficio covers all bands from 160M to 10M.

• Enhanced receive. A RF amplifier is now in the RF front end that provides about 19db of gain at 10M and tapers down to about 0db at 160M

• Receive Band Pass Filters for all band groupings (160M,80M,40M-60M,20M-30M,15M-17M,12M-10M)

• The same BPFs are used in conjunction with Low Pass Filters in the transmit path to provide a clean output.

• 5W Class A PA. Clean output of 5W on all bands (slightly less on 160M and 10M).

• Real CW. Supports zero latency CW. Software generated CW is not required.

The build time is approximately 2 hours by installing the through hole devices

Installing and using our transceiver on your PC is plug and play. There are no cumbersome and confusing configurations to deal with.

If building a kit is not your thing, we offer a build service at a nominal cost.

The build service provides a professionally built and fully tested transceiver.

The Proficio is also compatible with all host SDR applications that work with the Basic (HDSDR, Genesis SDR, Quisk and others).

The Proficio is supplied as a kit with all SMD devices installed. The customer needs only to install the thru hole components.

Specifications:

Receive:

Continuous from 1.8MHz to 30MHz. (Lower sensitivity below 1.8MHz and between amateur bands)

Sensitivity: MDS: Average -123db. (-125db on 10M. -121db on 160M) ( MDS performance specifications for amateur bands only.)

Transmit:

Power Output: 5W, 4W minimum (transmit permitted on amateur bands only).

Spurious Emissions: Meets or exceeds FCC requirements (-43db from carrier).

Frequency Stability: 1PPM (when using MSCC).

Technical support and documentation is located at: Support

Please do not use this website to obtain technical support. Requests for technical support via this website will not receive a response.

Enclosure not included.

NOTE:

These kits are produced at time of order. There is a 7 day lead time before shipping the kit.

5W HF QRP Transceiver
$425.00
Proficio MKII Fully buit and tested
Fully built and tested Proficio MKII.

The Proficio MKII is the next generation transceiver built upon the legacy of the original Proficio. With the RD16HHF1 final no longer produced we designed a whole new final built around a pair of RD06HHS2 which is an SMD device. We also wanted to incorporate some features we used to sell as optional external equipment. The MKII now has an external band switch jack for controlling filter switching on external equipment like and amplifier. Added the ability to switch an antenna. We also wanted everything within the enclosure so there aren't any unsightly fans or heat sinks hanging off the back panel. The cooling fan is temperature controlled and off when not needed.

The PSoC was moved to a separate PCB that mounts into a PCIe slot. This allows easy upgrading of the radio with new features by just plugging the new card in. The Electronic keyer is a plug in option.

The other major change was moving to PIN diodes for T/R switching. This in conjunction with our Electronic keyer option provides as close to QSK as we can get considering the slight latency on the software end. With a slight pause between words you’ll hear a responding station.

Another option is mounting an RPi4 or RPi5 inside the enclosure which, among other things, gives you the ability to remotely operate the radio.



The Proficio MKII is an all band HF (160M - 10M) transceiver with 5W output.

It has all the features of our previous transceiver:
•96kHz digital I/Q interface. No additional sound card needed. Only one USB connection is needed.
•Two tone, 2 kHz spacing, third-order dynamic range: 99 dB.
•Support for Elecraft T1 automatic antenna tuner.
•External Amplifier control via AMP port.
•External Amplifier filter control.
•External Antenna Switching.
•DG8SAQ/PE0FKO/SoftRock control interface.
•Open Source firmware.
•Firmware Field Updates via on board USB bootloader.
•Hardrock 50 control when using MSCC.

Electronic Keyer Option:
•CW Key Jack.
•PTT input Jack.
•Sidetone output.
•Sidetone Volume Knob.

Raspberry Pi Option:
•Top Cover PCB mount.
•5V Regulator.
•USB C pigtail.


With these additional features:

• All band. The Proficio covers all bands from 160M to 10M.
• Enhanced receive. A RF amplifier is now in the RF front end that provides about 19db of gain at 10M and tapers down to about 0db at 160M
• Receive Band Pass Filters for all band groupings (160M,80M,40M-60M,20M-30M,15M-17M,12M-10M)
• The same BPFs are used in conjunction with Low Pass Filters in the transmit path to provide a clean output.
• 5W Class A PA. Clean output of 5W on all bands (slightly less on 160M and 10M).
• Real CW. Supports zero latency CW. Software generated CW is not required.


The build time is approximately 2 hours by installing the through hole devices
Installing and using our transceiver on your PC is plug and play. There are no cumbersome and confusing configurations to deal with.
If building a kit is not your thing, we offer a build service at a nominal cost.
The build service provides a professionally built and fully tested transceiver.

The Proficio is also compatible with all host SDR applications that work with the Basic (HDSDR, Genesis SDR, Quisk and others).
The Proficio is supplied as a kit with all SMD devices installed. The customer needs only to install the thru hole components.

Specifications:
Receive:
Continuous from 1.8MHz to 30MHz. (Lower sensitivity below 1.8MHz and between amateur bands)
Sensitivity: MDS: Average -123db. (-125db on 10M. -121db on 160M) ( MDS performance specifications for amateur bands only.)

Transmit:
Power Output: 5W, 4W minimum (transmit permitted on amateur bands only).
Spurious Emissions: Meets or exceeds FCC requirements (-43db from carrier).
Frequency Stability: 1PPM (when using MSCC).

Technical support and documentation is located at: Support
Please do not use this website to obtain technical support. Requests for technical support via this website will not receive a response.

Enclosure not included.

NOTE:
These kits are produced at time of order. There is a 7 day lead time before shipping the kit.
5W HF QRP Transceiver
$475.00
SMSG (S Meter Signal Generator)
The SMSG (S Meter Signal Generator) is device that generates a selectable S9 or S4 signal in one of 4 selectable bands. The SMSG is useful for calibrating the S Meter of any receiver or transceiver. It is particularly useful for calibrating the S Meter of a SDR application such as HDSDR or GSDR and others.

Specifications: Output Impedance: 50
Output Level: S4:1.6uV (-103dBm), S9:50uV (-73dBm)
Amplitude Accuracy: S4: +/- 3dB, S9: +/- 3dB
Output Frequency: 80M (3.686MHz) +/- 30ppm
40M (7.040MHz) +/- 50ppm
30M (10.116MHz) +/- 30ppm
20M (14.050MHz) +/- 30ppm

The SMSG is sold as a kit and contains SMD devices. It is easy to build and will take about 2 hours for an experienced builder.

Technical support and documentation is located at: Support
Please do not use this website to obtain technical support. Requests for technical support via this website will not receive a response.

Enclosure not included.
S Meter Standard Reference
$24.95
UIA (USB Isolation Adapter)
The UIA (USB Isolation Adapter) is a USB 2.0 (Full Speed, Low Speed) compliant device that provides complete isolation of a down stream USB device from the up stream host computer. Ground loops are eliminated. Host computer or device generated common mode noise and RF induced noise is significantly reduced or eliminated. It also provides 5000Vrms isolation between the host computer and the down stream device. Also 8KV of ESD protection is provided. The UIA provides these benefits using a number technologies.

1) An Analog Devices ADuM4160™ USB Digital Isolator provides USB isolation.
2) RF chokes are implemented on all voltage supply lines.
3) Separate ground planes have been implemented for both the up stream and down stream.
4) Power for the up stream and down stream devices are completely separated and independent.
5) 8KV ESD protection devices are attached to the USB data lines.

The UIA works with any 2.0 USB Full Speed or Low Speed device. It is the solution for USB connections that suffer with ground loop or noise problems.


The UIA is sold as a kit and contains SMT devices.
Technical support and documentation is located at: Support
Please do not use this website to obtain technical support. Requests for technical support via this website will not receive a response.
NOTE: These kits are produced at time of order. There is a two day lead time before shipping the kit.
Isolate USB devices
$45.00
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