BC1088905 - Anyone tell me what this is or how to get some more

[bogart_sci]

Hello all,

I built a Silicon Tonebender a while back using Mitcester's schematic, using BC109 silicon transistors. I've never been too impressed with the sound really. Picked it up today to have a wee blast and much the same. I thought I would have a wee tinker with the transistors and swap one or 2 around. I found a transistor in my box that I acquired from work as they were throwing stuff out a while back. It's a BC1088905 with gold leads and metal can. Swapped this out for Q3 o. My board..... WOW!!!! What a difference! It's now become my favourite pedal.

Tried Googling BC1088905 and got no hits. I have one more of these beauties, but I want more. Anyone ever seen these before? Are they just BC108s with extra numbers at the end for confusion? Can anyone help?

Cheers all. I'm away to crack off a few more Hendrix licks.. I ain't done with this beauty yet!

[duck_arse]

what you have there is a "bc108", which was manufactured in the "05" week of 19"89", if my datecode reading is correct. the 108 is a slightly lower spec brother of the 109.

[Kipper4]

Great all round transistors
love the BC108
I was in my first build a treble booster ala Brian May

[greaser_au]

How to get some more?   reportedly you have to knock on someone's cellar door, and say "I love you, baby"...   

david

[armdnrdy]

How to get some more?   reportedly you have to knock on someone's cellar door, and say "I love you, baby"...   

david

Or.......just place an order with Tayda.

http://www.taydaelectronics.com/catalogsearch/result/?q=BC108

[duck_arse]

what's wrong with a bc548? obviously not metal can, and no gold leads, but otherwise?

[Kipper4]

Blah
BC548

NO BLING

Meh

[bogart_sci]

Cheers duck_arse. I've got a handful of bc108 fromRS, but not the gold lead ones. I've used bc109 for all transistors in this fuzz and bc108 for Q3, and there is a notable difference from using the bc109 in Q3. Thanks everyone for advice.

Cheers

[LucifersTrip]

it would be cool if you noted the hfe's of the Q3's and the collector voltages before & after the 108

that might help others building a si TB

[smallbearelec]

The BC10x were made by a gazillion shops. Gain buckets overlap among type numbers, and variations in junction capacitance make it very unpredictable as to just which one(s) will curl your fur. I have some stock of the CDIL (Continental Devices India) BC108B and a variety of others to try in this section:

http://www.smallbearelec.com/servlet/Categories?category=Transistors%2C+Bipolar+Si+%26+Unijunction%3ABC10x

To add to the fun, I have been scoring some Fairchild "Dots":

http://www.smallbearelec.com/servlet/Categories?category=Transistors%2C+Bipolar+Si+%26+Unijunction%3AFairchild+%22Dots%22

that hit the right gains for Tonebenders and such, and I have started to tap the mother-lode of high-quality, house-numbered TO-5 and TO-18 silicon that is available in various basements:

http://www.smallbearelec.com/servlet/Categories?category=Transistors%2C+Bipolar+Si+%26+Unijunction%3ABulk+For+FFs+and+BMPs

Happy experimenting!

SD

[analogguru]

The BC10x were made by a gazillion shops. Gain buckets overlap among type numbers, and variations in junction capacitance make it very unpredictable as to just which one(s) will curl your fur. I have some stock of the CDIL (Continental Devices India) BC108B and a variety of others to try in this section:

http://www.smallbearelec.com/servlet/Categories?category=Transistors%2C+Bipolar+Si+%26+Unijunction%3ABC10x

To add to the fun, I have been scoring some Fairchild "Dots":

http://www.smallbearelec.com/servlet/Categories?category=Transistors%2C+Bipolar+Si+%26+Unijunction%3AFairchild+%22Dots%22

that hit the right gains for Tonebenders and such, and I have started to tap the mother-lode of high-quality, house-numbered TO-5 and TO-18 silicon that is available in various basements:

http://www.smallbearelec.com/servlet/Categories?category=Transistors%2C+Bipolar+Si+%26+Unijunction%3ABulk+For+FFs+and+BMPs

Happy experimenting!

SD

Why should this Bipolar Junction Transistors be Uni-Junction Transistors ?

[smallbearelec]

Why should this Bipolar Junction Transistors be Uni-Junction Transistors ?

I did not have an obvious place for the 2N2646 and wanted fans of the Repeat Percussion device to know where to find it.