AD161 & AD162 Transistor

[ShantaramChari]

Has anyone here having a pcb layout of AD161 and AD162 transistor amplifier. I had heard that visha kits used to sell the pcb for 8 ₹ during old days, if anyone has that pcb kindly can you send me a pic, since I am currently making a amplifier using these transistors

Regards

 

[reubensm]

I dont know about Visha but if you are looking for a very high quality circuit using the AD161/162 pair, then look no further than the Philips 22RH580 from 1968. It is without doubt, one of the great sounding low power amplifiers featuring germanium transistors. The service manual and schematics can be easily downloaded online. The amp itself can be easily built on a bread board or a PCB can be home brewed for it. Here are the pics for reference:






A video of the amplifier playing:

 

[ShantaramChari]

I dont know about Visha but if you are looking for a very high quality circuit using the AD161/162 pair, then look no further than the Philips 22RH580 from 1968. It is without doubt, one of the great sounding low power amplifiers featuring germanium transistors. The service manual and schematics can be easily downloaded online. The amp itself can be easily built on a bread board or a PCB can be home brewed for it. Here are the pics for reference:

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A video of the amplifier playing:

Thankyou sir, will try making this amplifier.

Regards

 

[Zutech]

Hi Friends, this is my first comment, I don't speak a good english and try help to traslate, so I am not able to write much and for now I want give best wishes to you all (yall) and tell a big thanks for have posted these scheme because I am building an audio amplifier with AD161/162. This strarted because have seen in my much electronic material these transistors never used and I have asked to myself what they are... and after searching in internet, I have understood that maybe I have a treasure of vintage to try and I read that these germanium transistors sound almost like tube amps and I'm very curious. I have already assembled two circuits on breadboard to choose which one to build because there are variations on the net and for now I did not want to copy exactly the Philips scheme that I already had. I'm having problems because I don't find the declared voltages and some even seem impossible to me and I was looking for the original scheme again to understand if the variations are really worth building. Hello everyone

 

[reubensm]

Here is another circuit from a popular Indian Philips record player unit of the 1970s, called the Hi-Q International using AD161/162 output transistors.

Also attached is the service manual of another version of the same record player, albeit using the Indian equivalents of these transistors, namely PT4/PT6

Hope this helps.