Apologies in advance if this topic has been covered ad nauseam, but it's brand new to me... I was gifted a 1980s vintage Heathkit uMatic SA-5010 Memory Keyer at the end of a hamfest a few months back. The guy was packing up and identified me as someone who might be interested. The unit isn't very heavy or large so he lacked the usual "I don't want to lug it home" reason for its gifting. Yikes. Not wanting to pass on a free offer I enthusiastically thanked him for his generosity, partly in earnest as he included the original Heathkit manual so I at least had a chance at getting it to work barring any failed Reagan-era unobtaineum chips. I finally decided to try it out a few days ago, and after some initial confusion over the power source (the manual says it takes a special 8.6 VAC Heathkit supply but later suggests any 12 VDC 250mA supply will work) I encountered an endless beeping no matter what button I pressed on the membrane keypad. It turned out to be an over sensitive "dit" setting for the capacitive paddles and it was easily adjusted with a trimmer. I'm a 15WPM straight key op on a really good day, but after playing around with this keyer, I've discovered that unheard of speeds can be attained with focus and practice. BUT, and this finally brings me to my question, it takes merely a tap for dits and what seems like the same for dahs. If I tap the dah paddle with (what I think is) a dah, I get two or more so now I tap both paddles with dits. Did the previous owner go insane because of this and now I own the instrument of his demise? Am I going to start sending nothing but dits on my straight key?? The only comfort is the possibility that the keyer *does* allow "dah" length presses and that my "dah length" is lingering down at my straight key speed, thus causing the multiple dahs. By the way, this SA-5010 seems to me to be a remarkable device by today's standards and absolutely incredible by 1981 standards. I'd like to have an amicable relationship with the items in the shack so any advice is appreciated.