Tube Amps / Music Electronics
For current discussions, please visit Music Electronics Forum. New: view Recent Searches.
New: visit Schematic Hell!
The sunn still shines online!

Listen to great tunes streaming live right now!

ampage archive

Vintage threads from the first ten years

Search for:  Mode:  

Germanium transistors

2/11/2001 3:32 AM
Aharon Germanium transistors
I got some germaniums and I'd like to know if they are good candidates for a FF.I cross refferenced at NTE and they came out for the2SB173B=NTE102A and for the 2SB171B=NTE158.The replacement pinout is TO-1,do they correspond to the old ones?.Thanks,AC.
2/11/2001 5:56 AM
Joe Gagan

I am not sure about the pinout from Nte, but those 2Sbs usually have a dot [red or black] for the collector, and the middle is base.  
Provided they are not leaky [read Rg Keen's info on FFs and testing for leaky germaniums], those will be very nice for a Fuzz Face.  
It is always a good idea to use the 10K trimpot instead of the 8.2K resistor at the collector of Q2.  
There are also more biasing options available on Aron Nelson's Hornet. I always like a silicon and germanium mix , personally.  
2N3906 or eqiv on Q1 and 2SBxxx etc on Q2.  
Then you can build two fuzzes with the germaniums you have.
Book Of The Day The Ultimate Tone, Volume III by Kevin O'Connor
Have you ever wondered if there is a better way to build a Bassman, Champ, Plexi, an 800, AC-30, Bulldog or Portaflex? Or you wanted to build an SVT with off-the-shelf parts? How about a master-volume amp that doesn’t change tone with the master setting? Everything you need to know is right here, including: proper grounding techniques, wiring methods, and mechanical considerations. Eighteen chapters cover the “iconic” amps everyone knows and loves, with schematics and layouts for each, along with the technical history of the product. Eyelet-board and chassis-mounted tube socket construction is used throughout, for easy servicing and modding. TUT3 is very accessible even if you cannot fully read a schematic and is a "must have" if you are going to build an amp for your self.

Note: The Ampage Archive is an Amazon Associate site. A small commission is paid to the site owner on any qualified purchase made after clicking an associate link such as the one above.
2/11/2001 2:27 PM
Thanks Joe,they do have a red dot.I'll test for leakage.Cheers.AC.
   Page 1 of 1