Germanium investigations

[VeightTripleDivision]

I built the output stage from Mooly's thread using GT403s, 12,6V supply. I quite like it. Need a tad more colourfulness, just a tad morrre.

 

[astouffer]

Curious about the performance as the GT403 has an ft of only 8khz.

 

[VeightTripleDivision]

There is a slight sibilance relief using FiiO BTR5 and modded elcheapo Monoprice 8232. Much less fatiguing listening for few hours in a row.

 

[OldDIY]

GT403 has an ft of only 8khz - EF better

 

[Soundhappy]

..i found four output transistors, 2N3614. They measure as good.
Any idea what these are good for?

Maybe we request expertise of Mr. Pass ?
2N3614 data sheet this time is complete with SOA etc. Germanium investigations

 

[adason]

ok

 

[Soundhappy]

2N3614 data sheet by New Jersey Semi-Conductors
Germanium investigations

 

[adason]

I would like to build something very low power, 1-2 watts only, for the headphones. Ideally single ended. Perhaps like this?
Welcome to the DIY country ! - Transistor single ended amp

 

[adason]

anyone know schematics for this?
https://aliexpress.ru/item/4000941887225.html

 

[OldDIY]

Figures 3 and 6 show a circuit with two transistors 🙂
A separate transistor belongs to the power supply

 

[AnthonyA]

Ns 10, sansui777 - YouTube
Sansui 777 NS 10 yamaha At95e - YouTube

Rare footage of sansui 777

Yamaha NS 10m
At 95e cartridge with lenco

I think it's great
It's maine btw

 

[Soundhappy]

Evening music session to compare B1 Korg and Ge circuit Germanium investigations
Germanium bring realism to birds sing and water flow with magic cristal highs

Dawn of the Forest - YouTube

 

[Soundhappy]

Build Stasis amplifier front end with germanium transistors 😀
Mr. Pass designs with bipolars are back updated ,simplified. New Stasis front end

 

[xiaoping]

the picture

From my personall collection:a very musicall amp. It outputs 2-3w in 8ohms and almost 4w in 4ohms at 2-3% dist. It needs 1v max input. It works from the start. It had an output transformer in the originall schm but i modified the nfb to suport a choke for convenience. I used a shielded 10A@12v smps but would sound very very nice from a clasic CLC or 10000uf+10uF in parallel with a 65A car battery (best).

Hello, the picture is not clear, can you send me high-resolution pictures?

 

[Soundhappy]

After test in the line stage, germanium sound is something in between of Korg triode and Toshiba jfets sound.
Get a choice of preamplifiers with distinguished different active devices is fascinating to play music with
Power amp can be interesting indeed 21 Happy Germanium New Year ?

 

[sergiu2009]

Happy new year!! 🥳🥳🥳
I have attached the pic again. To me is very clear. Try to download it and see it again. If not send a pm with your email to me to send it to you via email.
I have to admit, after comparing different amps (majority of class a) i have settled to a solid state class AB hibrid germanium with AD166 output transistor and phase splitter transformer. 10w is more than enough to me.... I still have the Hiraga Super Nemesis (wich i considered to be one of the best sounding till now) to rest onto the shelf. To this date they sound exactly the same but the germanium dissipates wayy less..
Cheers
Sergiu

 

[PRR]

> the pic again.

 

[jpatay]

We have assembled germanium transistor circlotrons. Nice juicy sound.
The Germanium-only circlotrons. Powerful, wideband.
Our forum on amplifiers on germanium transistors.
Усилители на германиевых транзисторах - Форум

 

[Soundhappy]

Nice juicy sound Thanks for the schematic sharing

 

[jpatay]

You are welcome!🙂