For the same $2200 that I would spend on the HR500, I purchased the KM3KM Mercury III 1.2KW amp. I do like my HR50, but the HR500 is over-priced in my opinion. With the Mercury III, 10w in = 665w out.

#fdm-duo

Mark, Glad the interface got you going OK. The Hardrock 50 is a great amp. I just got a Hardrock 500 kit completed a few weeks ago. It works great on the FDM-DUO, a very neat portable station. I would

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Bob, Thank you for those details. Very helpful. Mark WU6R

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The Hobbypcb HR50 interface board works perfectly.

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The HR50 should have 817 mode set to NO as well as KX3 serial NO and set On the main menu Key set to PTT. On the Elad I have TUNE PTT set to no, but that is the only PTT setting I know of. I have it o

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That is exactly what I did and I get an error... I was surprised that I received an error. I'm wondering if there is a setting in either the DUO or the HR50 that needs to be set.

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You can make a cable with RCA connector for the PPT JACK on the hard Rock and a 1/8 " plug with a stereo plug in the PTT JACK with only a connection to the tip and ground. Leave the ring connection op

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I did use a stereo cable. I've ordered the interface from HobbyPCB, just wondering if I could rig something up in the meantime. Thanks. Mark

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Did you use a stereo cable between the FDM-DUO and the Hard rock? A better way is to use the interface that Hobby PCB sells, that will allow the HR50 to band change automatically with the FDM-DUO. Bob

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I hooked up my Hardrock 50 amplifier (DUO RTX/TX PL-259 connection to HR RF IN and DUO PTT to HR50 PTT) but I get a "DEMOD Error" when I press PTT or tap my cw key. Does anyone have success in connect

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Thanks Paul, I'll give it a try. Regards, Dennis W7DRW 73

#wsjt-x #fdm-duo

I experienved the same problem with the Elad FDM-DUO after a recent Windows 10 update. To restore, I powered off the FDM-DUO, rebooted Windows 10, repowered the radio so Windows would rediscover the h

#wsjt-x #fdm-duo

Wsjt-x stopped working - probably after a win10 update - it seems that there is a problem opening the audio input device. Can someone offer a suggestion on how to get back on the right track?? Thanks

#wsjt-x #fdm-duo

Bug working with my FDM-DUO... My thanks to all Happy Dance :-)

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All my tests were also performed stand alone. What I see is the not the same thing than Neil (Neil's looks even more interesting!). The "spurs" follow the main signal when moving frequency. For Klaus

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Heinz-Juergen, You are my hero! Problem solved! 73, und vielen Dank, Klaus & Heinz-Juergen. Jeroen PF1JM

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Check Menu 6 - AUX VOL - on the Elad. Sometimes it was set to OFF after using SW2. Factory Level is 50. 73, Heinz-Juergen DO1YHJ

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Spurii via DUOs 0 dBm port (usually used primarily for steering VHF/UHF transverters): Imho, spurii at +/- 48 KHz-something 'smell' like being caused by something related to an audio sampling rate. Mi

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Why are you concerned about spurii 90dB down ? Andy www.g4jnt.com

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I disconnected all not needed cables (among them USB) and the +-48kHz are still there in AM (without modulation) and SSB. If real, may be something to do with Microphone input (ADC 48KHz@16bit)? But w

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