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Stax energiser rebuild (SRD-5)

post #1 of 6
Thread Starter 

I acquired two Stax ''new'' SR 3 and one SRD-5sb unit. I have had them for a while and i am very pleased with their sound  but i hate not being able to use them for movies or games. The reason is that the energiser get it's power from the amplifier so they can't charge the headphones just from conversations... 

 

The SRD-5sb has the same transformers as the normal SRD-5 so all i need to do is to build it like the original SRD-5. The resistors and the capacitors are no problem but the SH-1 diodes isn't available. I also believe that the schematic is for 110V and here we have 230 (233v).

http://www2.famille.ne.jp/~teddy/pre/image/srd5-001.jpg

 

Any help would be much appreciated! 

post #2 of 6
Thread Starter 

Found that SH-1 is a silicon junction rectifier 400 V 150 mA so would for example 1N4004 or UF5404 work?

post #3 of 6
Thread Starter 

The new year started with some good luck. Apparently there are three SH-1 diodes in my sb unit. But don't worry, i will still keep the PCB and draw a schematic just in case i want to put it back. 

 

I also found the multi-voltage SRD-5. http://www.elektor.fr/Uploads/Cache/Forum/Posts/130220212630.SRD-5-Sch-ma.resized.454x0.jpg

 

Time to get some parts!

post #4 of 6
Thread Starter 

Parts are ordered and they should be here tomorrow. I also took the liberty to buy two 12v transformers that will be the isolationstransformers (connected ''back to back'') so i don't get electrocuted if i touch the wrong place... 

post #5 of 6
Thread Starter 

Did not go as i planned. I couldn't get the BIAS high enough and the sounds was awfully distorted. I did not test at full voltage but i gave up and put the old stuff in. Buying a non sb unit doesn't cost so much so i think i'm better of buying one of those instead.

post #6 of 6

I'm not fully sure what you were trying to accomplish, but sorry to hear it didn't quite work out for you...

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