Expert AMP interface cable Hardware

Barry Isseks

Lawrence Kellar KB5ZZB

KC5PCB makes these cables. Look him up. He might even tell you his “secrets”

Barry Isseks

Mark_WS7M

WX7Y

NC4AB

Mike Presnell

Mark,   how did you determine what PC settings?  I just didn't understand, after reading through the Expert manual.    Also,  did you put in a TX delay in your Flex?

KY6LA_Howard

Mike Presnell

Howard ,  have you been manually controlling the power out of your Expert amp, by manually adjusting your power out of the Flex? I am just really slow to understand the Low-Mid-High preset business with this Expert per their manual.   I had been using an Alpha 9500, and just simply used the power slider of my Flex to determine my amplified power level.

Barry Isseks

Hi again... comments like “it’s just a straight usb to serial.. plug it in to the Expert” is not helpful. The usb to serial is a 9 pin connector.. the Expert CAT port is db15.... A bit more hardware granularity is requested in this post gentlemen. I know you can do it...Ria’s Site might have held the answers.. alas.

Mark Erbaugh

Rick Hadley - W0FG

Or you can use FRStacks to control the front panel of the SPE and dispense with SPE Term.

Rick N4RZ

Dan's cable and the SPE Term_2k_232 program can give you complete control over the amp without using DDUTIL. 

From the Term_2k_232 program or from the front of the amp you can set the drive power on the Flex when the amp is in operate mode. You can set the radio drive power for each of the amps three power output levels (Low/Mid/Max) on each band you use.  Note: the maximum power your radio will transmit should be set in excess of the largest drive power you require for the amp.  I have mine set to 50 watts.  When the amp is in standby, the power output from the radio will revert to this value.

Dan's cable also provides amp relay keying and turns the amp on/off when the radio powers on/off using the Flex accessory connector.   With the 2K-FA, the amp needs to be on even if you are not using it unless all of your antennas are connected to the amp's Ant  1 port since the amp's antenna defaults to this port when it is turned off.

While I was lazy and bought a ready-made cable you can build your own using the manuals for the radio and the amp as other's have already indicated above.