Total posts : 45366
Yes, Neil, your question is exactly the next concern in the chain of improvements on the Ramsey AM25.
I could answer it this way: the output is essentially the same. But I think there’s more to it.
The output of the UNMODIFIED AM25 with a 3-meter antenna has less range than an AMT3000 SStran with the same antenna, therefore it’s less than desirable.
With my transformer modification I “feel” the output is slightly less than it was. The transformer may be reacting differently than the toroid form and absorbing some RF. Maybe it’s acting as a choke.
Therefore I’m going to try winding another 2/8 step-up transformer on a larger toroid and see where that takes us.
I did try one thing you said you’ll also try, namely “listen” to the straight modulation output and it sounded clean and strong. I haven’t run any of this through my scope, so if you check that I’ll be paying attention.