• The move to the new server is done. There are some software and database maintenance updates in process. This has us passing the hat around to help out. We appreciate any donations. Seriously, even a dollar helps. The payment page may be found here - https://www.audiokarma.org/support.html

Transistor search

shelly_d

shelly_d

Not An Audiophool
Please help:

I am looking for both 2SA1265 and 2SC3182 transistors to repair a Technics amp of my son's. I have tried Mouser, Allied, Newark and Digikey. I don't trust ebay sellers so I am hoping to find a reliable source for these or more modern equivalents from a reliable source. Here is a picture of 3 of the 4 in place. From the markings I'm guessing they are Toshiba. I don't care if the replacements are Toshiba or not, I do care that they meet spec and are reliable. I believe this amp pushes these puppies pretty hard.

Thanks for your help.

Shelly_DP1020199.JPG
 
Register to hide this ad
Thank you all. Decided to go with the substitutes. The higher ratings of the subs provides a wider safety margin on the operating point.

Thanks for the help.

Shelly_D
 
Before purchasing ask the weight of a transistor! .. it looks like an absurd request, but the chinese fakes are lighter! Weigh your first and then ask the weight of the new part! Example: original Sanken 2SC2922 is 19g, chinese Sanken 2SC2922 fake is 14g.
 
Last edited:
Hello
shelly_d said:
Please help:

I am looking for both 2SA1265 and 2SC3182 transistors to repair a Technics amp of my son's. I have tried Mouser, Allied, Newark and Digikey. I don't trust ebay sellers so I am hoping to find a reliable source for these or more modern equivalents from a reliable source. Here is a picture of 3 of the 4 in place. From the markings I'm guessing they are Toshiba. I don't care if the replacements are Toshiba or not, I do care that they meet spec and are reliable. I believe this amp pushes these puppies pretty hard.

Thanks for your help.

Shelly_DView attachment 778220
Click to expand...

I do have them new never used . How many do you need ?
I can tell you also that 2SB817 and 2SD1047 are perfect sub . I do have them also , new . Let me know what you need and I will be happy to help you

I am reliable source

DSC06127-RR.JPG

DSC06128-RR.JPG

DSC06129-RR.JPG

DSC06130-RR.JPG
 
Well, the replacement transistors arrived, I opened up the amp, ran a signal through it checking with my scope, and now I feel like an idiot:oops: for not doing that before ordering the transistors. There was nothing wrong.

My son described an event that should have blown the outputs of one channel:(. A dead short across the output of one of the channels, followed by that channel having no output. Sounds classic to me. Not having a schematic for this beast I have not idea whether it has protection on the outputs or not. Nor did I think to try to troubleshoot the thing cause my son had some trouble shooting skills of his own and i have come to trust him (maybe not any more:no:). I did get some information on it however. We have had it for years without knowing any specs on it. While on the bench with 8 ohm loads on it, I ran the volume up till I saw clipping clearly on the scope then backed it down to get a smooth sine wave. Not at all accurate I know but we got about 23.5 V clean across the 8 ohm loads. That makes it in the vicinity of about 70 watts/channel, both channels driven. So we now know the output (about) of this beast.

Thank you all for your help.

Shelly_D
 
I hope you will continue to trust your son.

Maybe take this opportunity to teach him some more things to observe when he is checking out a piece of gear, and to take good notes. I'd give my eye teeth to have a son to work with me.

Glad you have some spare outputs - - -
 
ghazzer said:
I hope you will continue to trust your son.

Maybe take this opportunity to teach him some more things to observe when he is checking out a piece of gear, and to take good notes. I'd give my eye teeth to have a son to work with me.

Glad you have some spare outputs - - -
Click to expand...

In the words of a former president, "Trust but verify...":bigok:

Shelly_D
 
You must log in or register to reply here.
Back
Top Bottom