2n128 Ge transistors

[paperhouse]

http://www.goldmine-elec-products.com/prodinfo.asp?number=G2299

Has anyone used these? I just ordered a few. The price looks good.

[joegagan]

haven't tried those, but i would say you done good. should sound really nice in whatever you build

i like that site, i have checked them out before.

[dxm1]

I picked up 25 of these on a whim.  It worked out to about US$1.30 each with shipping. I ran the batch
through my DCA55, and this is the raw data:


DUT   Hfe (Ic=2.5mA)   Vbe   Ib (mA)   Leak (mA)

1   21      0.67   4.26   0
2   15      0.55   4.75   0
3   17      0.63   6.66   0
4   27      0.63   4.66   0.04
5   23      0.59   4.7   0
6   BAD      Shorted Base Lead                  
7   46      0.65   4.64   0
8   19      0.75   4.54   0.19
9   39      0.65   4.64   0
10   57      0.63   4.66   0
11   21      0.65   4.64   0
12   37      0.69   4.6   0
13   40      0.63   4.66   0
14   BAD      Open Collector Lead                  
15   35      0.67   4.62   0
16   26      0.77   4.52   0
17   31      0.67   4.62   0
18   39      0.65   4.64   0
19   41      0.75   4.54   0
20   32      0.61   4.68   0
21   51      0.67   4.62   0
22   39      0.75   4.54   0
23   29      0.59   4.7   0
24   38      0.65   4.64   0.06
25   49      0.71   4.58   0

Now, the Peak insists that these are 'PNP Silicon Transistors'.  Measuring the junction voltages, I get between 0.7 and 0.75 volts. 

Hmmm...

I haven't had a chance to cork'em in to anything yet, so I can't say how they sound.

[sengo]

I ordered a number of these a couple months ago. I have not used them yet. I was sort of disappointed by the low hfe, and they had too little leakage to go into a Maestro Fuzztone build. Now I'm thinking about building a Rangemaster with one of them when I have some free time.

Nick

[smallbearelec]

TRY A BEAR BOOST PLUS!!

http://www.smallbearelec.com/Projects/BearBoostPlus/BearBoostPlus.htm

The gains look to be too low to bias well in an RM, but they look exactly right for a BB +

SD