Transistors

New Topic

128 topics

Topics

Replies

Views

Last post

J201 Source Drain Replacement

Last post by deltafred « 19 Jan 2018, 23:20
Replies: 2
by POTL » 19 Jan 2018, 20:44

Rating: 0.4%

Hello
For a long time I was collecting various layouts on J201. Now I decided to create a full-fledged effect. When designing, I noticed that I was...

2 Replies

1808 Views

Last post by deltafred
19 Jan 2018, 23:20
Germanium (or sillicon) BJT transistors leakage measuring pr

Last post by plush « 25 Feb 2017, 16:45
Replies: 2
by mailoszyarr » 24 Feb 2017, 23:55

Hi,
I was trying to measuring transistors leakage and HFE by this method:
I have two problems:
1. first reading of voltage is highest, then voltage...

2 Replies

1092 Views

Last post by plush
25 Feb 2017, 16:45
What to do with Russian low-gain MP37 Transistors?

Last post by modman « 31 Jan 2015, 18:22
Replies: 5
by guysmiley » 31 Jan 2015, 15:30

So I randomly(stupidly) ordered some germanium transistors off Ebay, without doing research first. I now have a ton of MP37 transistors, which were...

5 Replies

13575 Views

Last post by modman
31 Jan 2015, 18:22
Piggyback Si transistors to simulate Ger ???

Last post by ltdf50 « 12 Jan 2015, 16:20
Replies: 82
by gght » 17 Jun 2008, 23:15
1

2

3

4

5
Rating: 4.3%

Say a thread about this on DIY and a mention of it here by Modman. Was just wondering:

How did they sound?? Just like Ger, or so-so??

Thanks!
82 Replies

80904 Views

Last post by ltdf50
12 Jan 2015, 16:20
biasing jfets taking meters impedance in account

Last post by jimiguitar « 10 Dec 2014, 04:19
Replies: 2
by jimiguitar » 08 Dec 2014, 23:30

when measuring jfets for biasing do i need to take my meters impedance 10 meg into account and add that to the circuit

2 Replies

6797 Views

Last post by jimiguitar
10 Dec 2014, 04:19
Link for transistor equivalent

Last post by Mbas974 « 29 Oct 2014, 22:02

by Mbas974 » 29 Oct 2014, 22:02

Mojo guys wont like it.... :slap:

but this is cool link (better than google search!!) :

Have fun!

0 Replies

5992 Views

Last post by Mbas974
29 Oct 2014, 22:02
Wah Transistors

Last post by soupbone « 14 Oct 2014, 16:13
Replies: 2
by soupbone » 14 Oct 2014, 09:04

Rating: 0.2%

Can you use a BC108-9 in a Dunlop Crybaby,or a Vox V847?

2 Replies

7408 Views

Last post by soupbone
14 Oct 2014, 16:13
Fuzz Face - any risk of frying a transistor with bias pot?

Last post by DrNomis « 16 Sep 2014, 01:29
Replies: 5
by Tone-Analyst » 07 Sep 2014, 04:14

I decided to change the 8.2k collector resistor of Q2 for a 10k outboard pot. I like how it becomes spitty at lower bias voltages.
My question was...

5 Replies

11059 Views

Last post by DrNomis
16 Sep 2014, 01:29
Measuring Gain on NPN?

Last post by LooseCannon « 29 Jul 2014, 12:47
Replies: 8
by LooseCannon » 19 Jul 2014, 08:45

Hey guys,

I'm looking for a way to measure hfe on silicon NPN transistors (I don't have an HFE function on my DMM).

I've searched all over the web...

8 Replies

11175 Views

Last post by LooseCannon
29 Jul 2014, 12:47
j201 smd

Last post by jimiguitar « 12 Jun 2014, 22:40
Replies: 3
by jimiguitar » 08 Jun 2014, 00:32

does any one have any idea if i buy 100 j201 smd are the odds good that i will get 6 to work will for the pinnacle or should i buy more

3 Replies

8073 Views

Last post by jimiguitar
12 Jun 2014, 22:40
dot on germanium transistor

Last post by tonyharker « 14 May 2014, 08:37
Replies: 1
by copachino » 13 May 2014, 20:02

Rating: 0.2%

what does it mean a red dot on the transistors?? i have seen many dealers that says that their transistor have a red dot, but im not sure what ir...

1 Replies

8158 Views

Last post by tonyharker
14 May 2014, 08:37
jimmy page tone bender doubts

Last post by copachino « 09 May 2014, 13:48
Replies: 6
by copachino » 06 May 2014, 17:50

hi, im almost sure that jummy used a sola sound tone bender MKII professional, but i have seen many different settings on this pedal, im building...

6 Replies

9700 Views

Last post by copachino
09 May 2014, 13:48
Anyone try Russian P416b Germanium transistors ?

Last post by astrobass « 21 Apr 2014, 19:49
Replies: 3
by copperheadroads » 19 Apr 2014, 20:05

Looking at some of these & the gains might be a in a usable range & possible a little high hfe 90-200 .Any one try them ?

3 Replies

8014 Views

Last post by astrobass
21 Apr 2014, 19:49
Smallbear

Last post by GeSi « 27 Mar 2014, 13:50

by GeSi » 27 Mar 2014, 13:50

last night i surfed the site and all of his hard to get transistors were gone...
he is out of stock on all of them ! :o
question is... has he been...

0 Replies

6163 Views

Last post by GeSi
27 Mar 2014, 13:50
Cheap Semiconductors-Diode-Capacitor-Voltage-Tester

Last post by meek « 17 Mar 2014, 11:08

by meek » 17 Mar 2014, 11:08

i just bought this one:

with free shipping :)

this seller has more pictures of same product, but higher price:

i will use it for testin hFE and...

0 Replies

6142 Views

Last post by meek
17 Mar 2014, 11:08
BC109 doubts

Last post by Nocentelli « 09 Mar 2014, 12:25
Replies: 3
by copachino » 07 Mar 2014, 18:24

Hi, i want to build a tone bender MARKII, with the BC109 metal case transistor, but im not sure if this transistor are biassed as normal silicon...

3 Replies

7743 Views

Last post by Nocentelli
09 Mar 2014, 12:25
a case against the j201?

Last post by JohnBlakeArnold « 06 Mar 2014, 01:43
Replies: 19
by RnFR » 04 Jun 2010, 09:03

Rating: 0.2%

i recently found this in the book Solid State Guitar Amplifiers by Teemu Kyttala (available for download on the net here- - thanks teemuk! great...

19 Replies

28215 Views

Last post by JohnBlakeArnold
06 Mar 2014, 01:43
Voltage/Resistor/Q1/Fuzz Face

Last post by Duckman « 06 Mar 2014, 00:34
Replies: 27
by polifemo » 03 Jan 2014, 14:23
1

2
Rating: 0.2%

Messin' around with a FF circuit on my breadboard right now.
In Q1 I really dig a 2N3440 with a hfe at about 50-60, but the thing is that with a 33k...
27 Replies

27173 Views

Last post by Duckman
06 Mar 2014, 00:34
j201 smd vs to-92

Last post by IvIark « 23 Feb 2014, 18:20
Replies: 2
by copachino » 23 Feb 2014, 15:41

have anyone tried the smd version of the j201?? are they easier to bias??? or they are the same?? i want to get a lot of them to try them on the...

2 Replies

3305 Views

Last post by IvIark
23 Feb 2014, 18:20
Home-made Darlington problems

Last post by DrNomis « 08 Feb 2014, 16:04
Replies: 2
by commathe » 10 Dec 2013, 06:56

So I was playing around with slapping two transistors together to make a darlington and I have come across a really weird issue. For all transistors...

2 Replies

7304 Views

Last post by DrNomis
08 Feb 2014, 16:04
Ge Transistors

Last post by Godebut « 20 Jan 2014, 04:12
Replies: 9
by gurishka » 03 Apr 2012, 18:42

Rating: 0.9%

Hey all,
I just recently got in a batch of some PNP Ge transistors (GT308B) from Moscow with the Hfe ranging from 39-59....
Any ideas on what I can...

9 Replies

10534 Views

Last post by Godebut
20 Jan 2014, 04:12
2N929

Last post by Davelectro « 01 Jan 2014, 23:04
Replies: 8
by polifemo » 31 Dec 2013, 09:49

Hi,

I've got some silicon/npn/metal can 2N929 transistors that I bought 2 years ago, and that I really like the sound of.
I'd like to buy some more...

8 Replies

10665 Views

Last post by Davelectro
01 Jan 2014, 23:04
Leakage (Germanium transistor)

Last post by polifemo « 12 Dec 2013, 08:02
Replies: 13
by polifemo » 10 Dec 2013, 20:45

As germanium transistors are getting more and more difficult to obtain, I know that I in a near future will try to emulate the sound/behaviour of...

13 Replies

13614 Views

Last post by polifemo
12 Dec 2013, 08:02
Jfets discussion

Last post by ppluis0 « 16 Oct 2013, 00:24
Replies: 5
by full shred » 14 Jul 2013, 17:39

Hi to all.

Here is a good topic to discuss about the quality of jfets.
The most commonly used in pedals is j201. BUT i red in this forum
that j201...

5 Replies

5627 Views

Last post by ppluis0
16 Oct 2013, 00:24
JFET Biasing?

Last post by commathe « 08 Oct 2013, 06:31
Replies: 2
by commathe » 08 Oct 2013, 03:15

Rating: 0.2%

Hey everyone,

I have been running some simulations of JFETs in order to study a bit about how to bias JFETs properly and also to teach myself along...

2 Replies

7749 Views

Last post by commathe
08 Oct 2013, 06:31

New Topic

128 topics

Return to Board Index

Forum permissions

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum