Pete MB&D
Pete Maddex, the one and only!
Hi Chaps
My Hackernaps are based on my 135 clones so I am running +-56V on the output stage so a but close for comfort.
I had planed to add parallel output transistors to give me some peace of mind, and after the success of the NCC300 and it spurred me on.
I thought the easiest way would be to use a piece of U section aluminum to mount all 4 transistors with a small board to connect each pair up and add the extra link to another emitter resistor.
I use a small board with 3 1R 1W resistors for the emitter resistors and a wire from the second output transistor.
Output transistors by Pete Maddex, on Flickr
Its a bit tight in there!
Hackernap by Pete Maddex, on Flickr
I got the first one done and it sounds very nice, I had to tweak the bias which drifter a bit as it warmed but it was nice and stable as confirmed by the scope and generator.
I was doing the second one when everything started to look blurred, I had a silent migraine a nice C of flashing lights that slowly gets bigger and moves out until it disappears into my perifferal vision, so I stopped.
Pete
My Hackernaps are based on my 135 clones so I am running +-56V on the output stage so a but close for comfort.
I had planed to add parallel output transistors to give me some peace of mind, and after the success of the NCC300 and it spurred me on.
I thought the easiest way would be to use a piece of U section aluminum to mount all 4 transistors with a small board to connect each pair up and add the extra link to another emitter resistor.
I use a small board with 3 1R 1W resistors for the emitter resistors and a wire from the second output transistor.
Output transistors by Pete Maddex, on Flickr
Its a bit tight in there!
Hackernap by Pete Maddex, on Flickr
I got the first one done and it sounds very nice, I had to tweak the bias which drifter a bit as it warmed but it was nice and stable as confirmed by the scope and generator.
I was doing the second one when everything started to look blurred, I had a silent migraine a nice C of flashing lights that slowly gets bigger and moves out until it disappears into my perifferal vision, so I stopped.
Pete