Re: Really universal soldering controller January 22, 2021, 09:46:42 am Quote from: sparkybg on January 21, 2021, 05:39:09 pmWhoever sent me and assembled set of black boards 5.2C - I want to thank him and let him know that today I received it. I will try it out shortly.He also used GS8551/GS8552 amplifiers and I will also be able to check their performance.Thank you again.Quote from: sparkybg on January 21, 2021, 05:39:09 pmWhoever sent me and assembled set of black boards 5.2C - I want to thank him and let him know that today I received it. I will try it out shortly.He also used GS8551/GS8552 amplifiers and I will also be able to check their performance.Thank you again.This black four-layer board was mailed to you by "LOVE DIY". I hope you can test it. He can't leave a message on the forum right now. Let me tell you.