Welcome to the FlexRadio Community! Please review the new Community Rules and other important new Community information on the Message Board.
Need the latest SmartSDR or 4O3A Genius Product Software?
SmartSDR v4.1.3 | SmartSDR v4.1.3 Release Notes
SmartSDR v3.10.15 | SmartSDR v3.10.15 Release Notes
The latest 4O3A Genius Product Software and Firmware
If you are having a problem, please refer to the product documentation or check the Help Center for known solutions.
Need technical support from FlexRadio? It's as simple as Creating a HelpDesk ticket.

Opto-isolating my Alpha PA76P

ka9ees
ka9ees Member ✭✭✭
edited December 2025 in Tuner Genius XL

I aquired this amp a few days ago. I'll be driving it with an Icom 7300, then through the TGXL. What I need to know is, can I use the TGXL as an isolation relay? Thet keying voltage on the 7300 is 16VDC 0.5 Amp max, the Alpha is 26VDC @ 74mA max.

I will be connecting the the send from the Icom to the PTT input "B" on the tuner and the PTT output "B" to the Alpha relay in. Looks to my like it should work. but I don't want mess anything up. I have an outboard relay coming, in case I need it. It's a few days away, and I'm getting itchy to fire up this old amp

Leave a Comment

Rich Text Editor. To edit a paragraph's style, hit tab to get to the paragraph menu. From there you will be able to pick one style. Nothing defaults to paragraph. An inline formatting menu will show up when you select text. Hit tab to get into that menu. Some elements, such as rich link embeds, images, loading indicators, and error messages may get inserted into the editor. You may navigate to these using the arrow keys inside of the editor and delete them with the delete or backspace key.

Comment As ...

Categories