Newbie: Help finding replacement diode and transistor

[honeydrewboo]

Hello newbie here need some help finding some replacement parts for my Sony Bvm-1910. I found some on ebay but alot of the feedback says that the parts are fake. Rather use mouser/digikey/a reputable company, if possible, could get away with using an smd as well. Thanks!

Hitachi 1SS119 diode and Toshiba 2SA1091 (Q12) Lipple Filter in attached screenshot.

 

[ronsimpson]

Digikey shows 1SS119 but they will come from Rochester Electronics LLC which is somehow connected to Digikey.

2SA109:1 chip cloud I do not know these people.

 

[honeydrewboo]

Thanks for the reply! The only issue with the 1ss119's on digikey is they are in bulk, I do only need a couple of them.

 

[Lightium]

Any of these should be good for the 2SA109: Here

Seems like any diode with a forward voltage 0.8 has moved in type from through-hole to SMD.

You can try NTE, but I've always heard they are expensive. Here

 

[ronsimpson]

For the 1SS119, it looks like the diode is used to temperature compensate the B-E of transistors. In this case only the forward voltage drop is important. The speed of the diode is not but I would stay with a fast diode. The capacitance is not.
1SS119

1N4148, 1N914

I would consider the 1N4148 or 1N914. The forward voltage drop is slightly different, looking at 25C and 1mA.

 

[Nigel Goodwin]

The circuit looks 'similar' to a push pull audio amplifier, and such bias compensation diodes are EXTREMELY critical - and you MUST use the exact original types (or it's likely to self destruct again). For that reason Vbe multipliers are a far better solution.

However, this circuit is only low power, and uses 56 ohm emitter resistors, so thermal runaway isn't going to be an issue - so I would imagine it's not particularly critical at all in this case.

More of a concern is what happened to it? - was it physically damaged?, as it's unlikely to fail.

 

[aliarifat794]

Hello newbie here need some help finding some replacement parts for my Sony Bvm-1910. I found some on ebay but alot of the feedback says that the parts are fake. Rather use mouser/digikey/a reputable company, if possible, could get away with using an smd as well. Thanks!

Hitachi 1SS119 diode and Toshiba 2SA1091 (Q12) Lipple Filter in attached screenshot.

Take the feedback seriously. Buy from a reputed manufacturer/supplier.