[hpsdr] Hermes cost

Luis Perdomo luisfp at gmail.com
Thu Feb 23 12:03:33 PST 2012


Looking thru the rear window:

>From TAPR: Ozy, Atlas, LPU, Metis, Pennylane and Mercury=  $ 1,358 +
shipping (for TAPR members)

Now let's look at the Wiki page for Hermes:




   - Uninterrupted coverage from 50kHz to 54MHz
   - Transmit and receiver image rejection > 110dB
   - Full duplex operation, any split over entire 160m to 6m range
   - Future expansion possible to eight independent receivers using the
   same antenna
   - 500mW RF output on 160 – 6m amateur bands
   - Built-in high performance preamp, with a noise floor typically -135dBm
   in 500Hz
   - Software-selectable 31dB input attenuator in 1dB steps
   - High performance receiver – same specifications as the HPSDR Mercury
   receiver (ie Blocking Dynamic Range typically about 125dB)
   - FPGA code can be updated via the Ethernet connection
   - Seven user-configurable open-collector outputs, independently
   selectable per band and Tx/Rx (for relay control, etc - with sequencing via
   PC code)
   - Separate open-collector PTT connection for amplifier control, etc,
   with sequencer
   - Microphone PTT jumper-selectable from tip or ring connection
   - Bias for electret microphones via jumper
   - Four user-configurable 12 bit analogue inputs (for ALC, SWR etc)
   - Three user-configurable digital inputs (for linear amplifier over
   temperature, etc)
   - Optional in-built switch mode power supply – less than xxxmA (receive)
   from a 13.8V supply
   - I2C bus connector for control of external equipment
   - Full QSK using the Kiss Konsole software, since digital signal
   processing is not used in the controlling PC for CW carrier generation
   - Low-level transmitter output for transverter use (0dBm) as well as
   user-selectable output attenuator
   - Stereo audio outputs at line and headphone levels
   - In-built 1W stereo audio amplifier for directly driving speakers
   - Direct, de-bounced connections for a Morse key (straight or iambic)
   and PTT
   - 122.88MHz master clock, which can be phase-locked to an internal 10MHz
   TCXO or external frequency reference
   - Jumper-selectable external frequency reference, with signal
   processing, to suit numerous GPS-locked 10MHz reference sources
   - Direct ribbon cable interface to
Apollo<http://openhpsdr.org/wiki/index.php?title=Apollo>15W power
amplifier, low pass filters and automatic ATU or
   Alex <http://openhpsdr.org/wiki/index.php?title=ALEXIARES> Antenna
   switch, HPFs and Tx LPFs
   - Low noise, high efficiency, Switching Power Supply designed by Kjell
   Karson,LA2NI
   - Ethernet interface supports fixed, APIP or DHCP IP address
   - Hermes responds to ping and ARP requests, auto senses Ethernet cable
   connection and connection speed

Compare that to the commercial radios on any ham radio magazine...


I will keep my present setup and get one or maybe two...Hermes[?]


73, Luis NZ5U
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