PTT dropouts and metering issues

[Andrew Catanzaro]

I have made previous posts regarding erratic PTT keying on CW and SSB with the HR-500.  Also, the metering is slow and not particularly useful.  Joe VE7VXO contacted me privately to acknowledge my posted issues.  He offered a solution to both issues with new firmware he's written for the amp.  I installed it and have been using it for over a month now with excellent results.  The PTT line keys 100% reliably now.  The amp's hang time has been adjusted to a reasonable amount for clean semi-QSK operation and without dropouts.  The power meter now follows within the amp in real time and has a peak-hold feature.  This firmware and a much better description of it by VE7VXO can be found at:

https://github.com/ve7vxo/HR-500-v6.01-custom-firmware

This firmware loads through the USB jack on the rear panel.  The HR-500 debug bootloader loads it fine.  

I'm simply the messenger here for Joe VE7VXO.  If you have questions about the firmware familiarize yourself with all the info on the github site and then contact Joe directly.  I have had no problems with the firmware and am satisfied it's provided a quantum improvement in my satisfaction with the HR-500.

73- Andy W9NJY 

  

[Robert Cheek]

I also experienced issues with the PTT keying of the HR-500.  Otherwise it is a terrific amplifier. 

I just downloaded and installed Joe VE7VXO firmware in my early production Hardrock 500. The new firmware provides very much improved function on the PTT and the metering. 

Thanks to Joe VE7VXO for the excellent update to the HR-500!

Regards and 73,

Bob - N4RFC

[Maurizio Brameri]

Hi,

is this firmware compatible with ATU unit of HR-500?

The correct file of VE7VXO distribution to upload to linear is "HR-500_V6.01.ino.mega.hex" or "HR-500_V6.01.ino.with_bootloader.mega.hex" ?

Many thanks and 73s.

[Geert Jan PE1HZG]

"Is it compatible with a HR500 with ATU unit" - YES, at least, it works for me.

What I did, early in the development process, is to get myself another MEGA2560 board (empty) and program it, then keep the original board (with original firmware) aside as a possible step-back. In hindsight I found this was not needed and during the development process (the firmware available now has some changes I made) I would have been able to "step back" but, as said, never required it.

I now simply recommend to upgrade the firmware of the HR500, especially if some of the changes benefit you. I am very happy with 6.01.

73, Geert Jan PE1HZG