The lateral parts have lower transconductance but also lower temperature coefficients.
I do have a diy version using the Alfet laterals, scheduled for release this year.

I do have a diy version using the Alfet laterals, scheduled for release this year.

Or a link pls— thanksThere's a modification required in the feedback circuit discussed earlier thread, and is conceptually similar to the F7, at least the first drawings presented by Nelson in that thread. I've successfully used 3 pair output with the original feedback network and values (50/10R ~15dB gain) with no issues, three pairs LATFET at ~1.7A cumulative bias are required to yield similar CLG to a single pair of vertical MOSFETs @1.3A
It still has less feedback, which is something you might like, or not.
There isn't a readymade circuit for what you're asking. Have patience:
https://www.diyaudio.com/community/threads/f5-power-amplifier.121228/post-7574683
https://www.diyaudio.com/community/threads/f5-power-amplifier.121228/post-7574683
Not without additional schematic changes. Those are lateral mosfets. See the F5m and F5m kit threads for relevant lateral fet discussion.
So, do you like the 2SK1530/2SJ201 F5 better?All the recent F5m talk got me to put my 2SK1530 / 2SJ201 F5 back in the main system.![]()
Rush
I'm assembling an F5 using the parts kit/chassis/boards etc. from the store and realized that I'm missing the X1/Y1 capacitor for the wiring at the terminal block. Not sure if I forgot to order it or simply can't find it in my mess of a work area (I ordered parts a while ago). What are my options? I have lots of caps on hand of various types and I hate to put in an order for one item from Digikey...
That capacitor isn't necessary for proper operation, it simply may filter a little line noise before it gets inside the transformer.
Go ahead build and enjoy the amp without, maybe order one some other time. (The X1/Y1 rating is safety precaution for direct line connection.)
Go ahead build and enjoy the amp without, maybe order one some other time. (The X1/Y1 rating is safety precaution for direct line connection.)
Thanks TA and Dennis. This is what I suspected from searching the thread, but I wasn't sure that I could go without it (for now). One other question, I saw from searching that the value of the X1/Y1 capacitor isn't as important as the X1/Y1 rating itself... Is this capacitor something I might find locally, at an electronic supply store etc., or should I just plan on ordering it from Mouser or Digikey?
The rating is the important bit for caps used across the AC line. The ratings have to do with the mode of failure depending on where they are placed across the AC line.
Dan
Dan
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