back to The Leach Amp
ok, here is my vision of the correction of this amplifier.
P.S. the initial current of each pair of output transistors is 110 mA.
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Not really, tech is tech sometimes it denies us an opinion, sometimes you want to think one way then the project expands your mind and you think another way, watch the video and see the phase lag oscillation🤦♂️
Each to his own then.
Thanks for sharing your ideas your recipe just like the original recipe are all valid.ok, here is my vision of the correction of this amplifier.
P.S. the initial current of each pair of output transistors is 110 mA.
The article is describing a known weakness of emitter followers: they are bidirectional. Some output gets fed back to the input.Bonsai said:See pages 19-23 in the link below. Although this mainly concerns itself with small signal buffers, the theory applies to power buffer stages as well, and especially in the case of EF2/3 and CFP.
https://worldradiohistory.com/UK/Wireless-World/00s/Electronics-World-2003-10-S-OCR.pdf
You, me, and Rotel all fixed the Leach amp in similar ways.Hennady Kovalsky said:ok, here is my vision of the correction of this amplifier.
Ed
On my own amp experiments, I suspect that mounting the outputs (and the drivers) on the same HS may cause (another) unwanted parasitic C, so I make changes in that regard....
Also, big C near the outputs may cause big currents to run on G and couple to other paths--> I decouple the G to HS.
But I am only a dilettante....
Best of wishes for your project!
M.
Also, big C near the outputs may cause big currents to run on G and couple to other paths--> I decouple the G to HS.
But I am only a dilettante....
Best of wishes for your project!
M.
Thanks @maxlorenz, good ideas there that actually work great for CFP, yes the grounds are decoupled.
The video is loading soon and its interesting what solutions do work
The video is loading soon and its interesting what solutions do work
An interesting article about buffers here https://worldradiohistory.com/UK/Wireless-World/00s/Electronics-World-2003-10-S-OCR.pdf
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