Guessing such "alien" TO-3 is not use inside the kit..
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Actually very safe place on earth is an electronic work bench 
Get box full of Sony Vfet's and have good time 😀

Get box full of Sony Vfet's and have good time 😀
if puny BC550 is what is enough to uplift someones wit and creativity, I have no objection
Unobtanium is not a conditio sine qua non

Unobtanium is not a conditio sine qua non

@ Zen Mod
Vfet's and other TO-3's can be obtained with the kit in the store.
In the near future is my hope.
How many of BC550 inside of Zen Mode Hi-Fi ?
None.
All small signals are jfet's and most power transistors is a super rare unobtainium SIT's.
No joke 😀
Vfet's and other TO-3's can be obtained with the kit in the store.
In the near future is my hope.
How many of BC550 inside of Zen Mode Hi-Fi ?
None.
All small signals are jfet's and most power transistors is a super rare unobtainium SIT's.
No joke 😀
@ Zen Mod
Vfet's and other TO-3's can be obtained with the kit in the store.
In the near future is my hope.
How many of BC550 inside of Zen Mode Hi-Fi ?
None.
All small signals are jfet's and most power transistors is a super rare unobtainium SIT's.
No joke 😀
I'm lazy
using BC546 and BC556
when I grow up, then maybe I'll hop on bigger number BCs

Yeah but not in amplifiers with SIT-1 or 2SK77B etc. haha
If Zen Mod bring new threads with BC550 audio creativity revolution I stay in tune
Have a nice Sunday
If Zen Mod bring new threads with BC550 audio creativity revolution I stay in tune

Have a nice Sunday
Without jfet's ? 😉using BC546 and BC556
Sherlock Ohm with Dr. Watt's find vfet but not differential amp 
Differential Amplifiers : R.D. Middlebrook : Free Download, Borrow, and Streaming : Internet Archive

Differential Amplifiers : R.D. Middlebrook : Free Download, Borrow, and Streaming : Internet Archive
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From 2 march to 2 may, two months leater please Mr. Pass any Watt's New about Vfet amp and kit ?But not an easy design.😉
Greedy Boy feels starved 😀 Kind regards
@ Zen Mod
We get crossovers and preamp's from Papa and he is very busy..
Last time DIY power amp article was in 2016..
Practically four years of new DIY power amp's "famine" to may 2020
We get crossovers and preamp's from Papa and he is very busy..
Last time DIY power amp article was in 2016..
Practically four years of new DIY power amp's "famine" to may 2020
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