Interesting. Sounds like a common-mode issue.?
I will say that I notice very little hum with my old, beat-up Sony stereo ¡®phones on any of my Drake gear.?
Chasing that stuff at audio frequencies can be frustrating¡
Steve Wedge, W1ES/4
Time flies like an arrow. Fruit flies like a banana.
On Tue, Dec 5, 2023 at 09:36, Ed G <
ed.n3cw@...> wrote:
Hi Steve...yes, probably the case here.? My 2-C sounds great when using speaker and most of my headphones, but I have a favorite pair of Kenwood HS-5 phones that are very sensitive but allow me to hear some slight hum in the 2-C.? The 2-C has recently been re-capped, with no apparent effect on the hum.? I do notice that if I use an external audio isolation transformer between the 2-C and the HS-5 headphones, I can get rid of the hum.? I also noted that there is absolutely no hum when using the HS-5s with my R4-B receiver.? Not a big problem at all but I was curious to see if any of the group has any past experience with trying to eliminate the 2-C hum.
--Ed, N3CW--
