My beloved amp

[ROCKMANDRAKE]

Dear Dark Horse, ( hi, destroyer X )



Congratulations ...


Here is Little brother fully functional schematic...


Please note output transformers are compulsory if you want to avoid offset...


Sound is gorgeous with high sensibility loudspeakers ( 96 db 1W 1m, at least )...


Ps : AD 161 can be swapped for 2N326 or 2N1218...


Regards from FRANCE


Rock

 

[destroyer X]

Lovely things beeing done here.

Congratulations to all of you... a real diy spirit lives here.

regards,

Carlos

 

[Bigun]

Does the sound of this amplifier depend more on the output transformer than on the transistor for the 'tube sound' - I often see these transformers in tube amplifier designs ?

 

[DarkHorse]

Dear Dark Horse, ( hi, destroyer X )



Congratulations ...


Here is Little brother fully functional schematic...


...

Sound is gorgeous with high sensibility loudspeakers ( 96 db 1W 1m, at least )...


Ps : AD 161 can be swapped for 2N326 or 2N1218...


Regards from FRANCE


Rock

Thank you,Mr. Rock!
Is you Lead me to the germanium way...haha...
I using Fostex loudspeaker unit,model NO. is FE126E 93dB...
as you say so:it Sound gorgeously...
because using Z11 high quality EI sheet...so the efficiency above 35%...without global NFB makes germanium's characteristic showed nudity...I love this circuit topology.

enjoy it!
regards from china
winco






😉

 

[destroyer X]

Here is one i have made to have fun

Using 220V - 100 watts ligth bulb as load (34.5 to 45 ohms) i have made this toy to have fun.

Power is very low... THD is also very low...sound is fine.... quality is high, this one is not too much mufled as transistor is having very high current.... the ligth bulb will dissipate 35 watts of heat...efficiency is bellow 4 percent to have a clean sound with low distortion.... a nice stone aged amplifiers ...because waste a lot of energy without produce power.... a really bad design this one i have made...but serves to have fun during a rainy weekend.

A very low power you gonna have...but enougth to drive almost all kind of speakers.... audio frequency response goes to deep bass and very high frequencies..the unit is flat.

Transistor will also dissipate enormous heat.... 35 watts is a lot of heat and the transistor operates very hot..use enormous heatsink if you are not living in Siberia.

enjoy...nothing special...just a toy...this one having something about Rock Mandrake style of amplifier....lovely units those ones.

A real DIY amplifier.... sounds very good...cost is low.

Supply, to have 70 volts, can be picked from the plus 35 and minus 35 supplies you have around..the ones used normally to the biggest majority of 50 watts amplifiers we have into our forum.

regards,

Carlos

 

[destroyer X]

Into the highest DIY spirit during rainy weekends

You can use a 220V lamp as a load.... a real fun as lamp ligths yellow and variates it's glow.

Call you children..they will be very impressed.

Lovely toy.

regards,

Carlos

An externally hosted image should be here but it was not working when we last tested it.

 

[DarkHorse]

finally...I post this schematics that test passed:

 

[ROCKMANDRAKE]

Germanium SE

Dark Horse


you are Great !!!


Rockmandrake

 

[DarkHorse]

Re: Germanium SE

Dark Horse


you are Great !!!


Rockmandrake

haha...yes!
And You too Mr.Rock...we love germanium amp's!
even it is old solid stone or metal,but every time I touch this old transistor,I will full opened eyes on this magic things...







have fun!

 

[guoxing]

hi

study,learning to built the amp

 

[bata bane]

Finaly, I was thinking I was crazy...to love germanium but...

maybe I am not afterall....

for my friends, it might help...

Full Ge SE amplifier...32V supply, and about 2,6 A bias curent...😎

 

[bata bane]

And the schematics...


the original thread was here...

http://www.diyaudio.rs/topic/353-germanium-se-amplifier/

regards,

Bane

 

[ROCKMANDRAKE]

SE Germanium

Dear Bata,

interesting & beautiful Thing !!! Congratulations ...

I like wood finition.

Is there any possibility to swap russian transistor for European equivalent 😕


Regards from France

Rock

 

[bata bane]

it would be much easier to try to find it on ebay...find mine there

I tried to find it for you, but no luck...you have to try

they are caled 1t813b(russian) or GT813V (english)...50V/30A/50W

they can endure even better...thy are military grade for shure

regards Bane

 

[bata bane]

this is the link, transistors are not 1t813b, but contact the seller...I think I bought from him🙂

just ask him for GT813V😉

http://global.ebay.com/GT806B_Germanium_PNP_Power_transistor_USSR_Lot_of_10/310147760397/item

ragards B

 

[ruben alstad]

BZX8510v is just a zener diode for biasing? Any 10v zener would be a drop in replacement?
Sorry to drag the thread back up after 7 years.

 

[xiaoping]

AD161/162 Z3

Hi,

very good idea but >>>>


don't forget that i can send to you 2 matched pairs ( siemens AD161/162 Z3* ) and 2 ac153K ( siemens ) for free !!!

Please note : Z3 means low gain so you will have to swap " compulsory kiwame " ( 220 ohm - on my schematic ) for 82 or 100 ohm.
The 8.2 ohm which link AD161/162 base will be swapped for 2 or 3 ohm one !!!


* AD161/162 high gain are Z7 series....


Gérard

Hello sir, I like classical music very much. I really like the sound of germanium, can you send me a pair of 2 matched pairs (siemens AD161/162 Z3*) and 2 ac153K (siemens )? Email: 1210536522@qq.com

 

[OldDIY]

Транзисторы AD161/162 на IZI.ua (860512)

 

[renewoyb]

I would also really be into seeing a schematic and maybe a little more of explantion of the layout.