CW on Hermes....

[John B]

How well does the Hermes Lite do on CW? I"m interested in hearing about the latency and TR transitions. I'm not a high speed op by any means but enjoy a ragchew in the 20-25 WPM range. 

Would a Hermes Lite be suitable for such an application?

Thanks

John K5MO

[radi...@mail.com]

I use my HL2 on CW with SDR Console SDR software. It works extremely well with fully configurable semi break-in and built in sidetone generated by SDR Console to PC audio output. Sidetone has no detectable latency at all at up to 30 wpm. Maybe beyond but I'm not that fast!  I'm using the G4ZLP DigiMaster keyer (WinKeyer compatible commands) plugged into the front panel KEY/PTT socket. I also have a footswitch connected to the same socket (with a 3.5mm "Y" splitter) for manual switching when I decide not to use the break-in and use manual PTT instead.

https://www.g4zlp.co.uk/unified/DigiMaster_CW.htm

Details of configuration options for SDR Console here:

https://www.sdr-radio.com/hermes-lite-2

Hope it helps.

Max

[Jean-Baptiste GALLAUZIAUX]

With SparkSDR you can do CW with your keyboard to TX and have the RX decoded because SparkSDR uses Fldigi in the background.
Hope it helps. Pierre - FK8IH

[Robert Benedict]

I also use SDR Console for low latency CW along with the first, now obsolete hardware, version of the HL2 keyer as a simple WinKeyer compatible keyer.

    Bob  KD8CGH

[John]

Thanks to all for the very helpful inputs on the HL in re: CW

73

JohnK5MO

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[Geir T. Christiansen]

I am using CW with Iambic keyer at speeds from 20-30 wpm. And it's working UFB for me.

Not full QSK, but who needs that....

73's Geir/LA5ZO

[Alan Hopper]

Hi,

just for the record, the cw decoder in SparkSDR is built in and does not use Fldigi.  You obviously can use Fldigi with the DigiU mode if you want.

73 Alan M0NNB

[Paul Christensen]

In an effort to reduce relay clicks in CW mode, I've attempted to replace the HL2 T/R relay with a silent RF reed relay that I've used in many other T/R applications.  While the new T/R relay is silent as expected, one or more relays on the N2ADR board remain engaged during the T/R cycle.  In Thetis' OC CONTROL menu, I have the ability to change the conditions upon which the LPF/HP filters are engaged (see attachment).  

Referring to the attached image below, note that the N2ADR relays should remain static during each T/R transition.  The exact same pin combination is used for transmitting as well as receive.  Still, there's at least one relay on the N2ADR board that continues to switch with each T/R cycle and without investigating further today, I believe it may be band 7, the HPF relay.  That relay may possibly be forced to disengage in transmit during each T/R cycle irrespective of the pin 7 transmit check box setting.

Ultimately, I want only the T/R relay to switch between T/R cycles in CW mode.  Completely disengaging all relays in the OC Control matrix is not an option.  Thoughts?

Paul, W9AC

[Paul Christensen]

I spent more time with my HL2 today.  Conclusion: it's not possible to eliminate all relay chatter in CW mode due to the N2ADR MW band filter.  The filter topology daisy-chains all LP filters in series with the BC band filter.  It would mean either bypassing the MW band filter on receive or transmitting through the MW band filter on Tx.  I tried and there's just too much transmit insertion loss on 160m/80m. 

If it were not for the MW filter, I achieved noiseless T/R operation when using a silent Aromat RSD-12D RF reed relay in place of the stock Omron datacom relay.  

Paul, W9AC