There's such a thing? :scratch:
I mean, I think it would, like in every OA, but I'm guessing if there's noticeable effect when you're choosing between them in a buffer level, or a Big Muff, or any transistor dependant device.
I want to make some kind of device/kit that allows me to measure leakage and hFe. Anyone have any links/plans/advice?
Here's what Analog Mike uses... I'd love something like that... (although I must admit I don't know exactly what I'm looking at here)
I was going to get a cheap digital multimeter that has hFe capability but after reading some stuff on the web it seems that a cheap DMM won't take leakage into account. I'd like a reasonable degree of accuracy - and if leakage isn't taken...
I had a few misc transistors lying around and I just finished another SHO w/ added volume and tone controls (here's another question, the tone control sucks. I am using a 47uf cap for it and I much prefer this circuit without any tone knob. Has anyone put a good tone circuit to roll of a bit of high end for certain applications?). I socketed the transistor this time, so I tried swapping it with what I had lying around. I honestly didnt research to see if the pinouts were right or anything...
I'm trying to put together a circuit block that will essentially act as a noise gate (for instance, ignore all input signals less than or equal to 50 mV p-p, yet pass signals greater than this). In my small experience I've found that under-biasing Ge transistors yields a similar gate effect and I was wondering if this held true with other transistor types as well. I would guess that Si transistors (BJT) behave the same way, but FET types would be...
I cannot explain exactly why, but I think I prefer all variations of transistor/FET designs over opamp designs for guitar related dirtboxes. By now I have modded three different Big Muffs to achieve three different sounds and they all sound great, the modding was fairly effortless once you learn certain things and I was able to achieve my end tones. I've also been working on an opamp design or two for a lot longer than I would like to admit working on a single design to reproduce good sound,...
Can we build a thread about the theory involved with audio electronics? Please point me in the right direction if we already have one. I haven't yet seen one... I think it would benefit us all here at FSB and give the knowledgeable members of the forum a chance to brush up on the things that they left behind at university.
I was looking to do an electronics course at college but, it wasn't solely focused on what i wanted. It would give me (as well as everyone else in my situation) the...
Would anyone who owns a Hoof Fuzz be so kind as to take two quick measurements? I just want to know how Q2 and Q3 are biased. I would love to know the voltage reading on the collector leg of Q2 and Q3.
A little while ago I knew nothing about Fuzz designs, today I know little bit more.
I´ve understood that a PNP Fuzz fixed up for negative ground means problems, but I did not know this when I ordered a Tonebender Mk-lll kit of such a kind.
Here´s the schematic
I built the pedal today, and it does work and sound quite OK, but something MUST be wrong...
I can't bias it any lower than a little below 6V no matter what I do.
I´m using a 22k trimpot, instead of the 18k resistor, but even...
I'm new to Fuzz design but I've been doing a lot of reading lately and a couple of days ago I came across the idea of connecting Silicon transistors in parallel in order to reduce gain (often needed as silicon trannies are way hotter than the germanium ones).
I've bought a PEAK atlas DCA55 component analyzer that takes readings of HFE (+ many other things) but when I solder two transistors together I still get half the same HFE measurement instead of half the gain, which was what I...
i decided to put some sockets on my big muff build board as im not too sure which transistors to get
i fort got to order some 2n5088 with my last order from futurelec so i have to try source some trannies locally.
i found some Pn100 (TO-92) which are meant to be drop in replacements for a whole heap of trannies?
i also have a heap of BC108/109
seeking some info or thoughts from muff build conniesiurs (inc muff variants like the skreddy mayo,devi hyperion etc) on what transistors sound good...
I saw this video and was amazed at how few parts there are in this thing. It's clearly a germanium fuzz-thing but I was wondering if you guys had any insight. Cheers
I spent some of the weekend culling Ge transistors from old electronics (mostly radios). Here's my take:
Most everything is clearly marked and easy enough to identify except a few from an old Japanese made alarm clock/radio. They're marked with a large block letter S ..you can kind of see it in the photo below. Anyone know who made these?:
Out of the close to 40 I culled, only four didn't sound very good in a fuzz face I breaded boarded or where noticeably noisy. Next up is to measure...
I'm going to make a Fuzz factory type clone for my first pedal build just because I think it's interesting and fun and well. Cheaper. I'm using the parts list here:
But I've managed to find some of the capacitors etc and the enclosure a bit cheaper so I'm only going to be ordering the PCB and some other parts from their site directly! I'm just a bit confused about the two Germanium transistors:
Q2 AC122/AC128 60-90
Q3 AC122/AC128 110-140
I understand they come in different values like...
Hey there, this is my first post, ( hello everyone! ) so please forgive me if this has been covered already, but I couldn't find anything on Magnatec AC128's.
I know David at D*A*M is now using them in several of his pedals and was wondering if you guys have had much use of them? Just wondering how they compare to the nos AC128's...?
So I want to build a Tone Bender clone for my pedal board. But I also want to use my 1spot with it. I've been reading around, and digging around trying to figure out an easy (and cheap!) way to go about this. And then it hit me like a brick wall. I wanted to ask here to see if I'm just dreaming, or if this really is as easy as it seems: could I just stick the +9V voltage into the inverting input of an op amp, ground the non-inverting input, and would that flip the voltage for me to run the rest...
I'm looking to eBay some transistor bundles where I can select from 20 different varieties to make the 100. What are done of the more commonly used trannies to know what I should grab in bulk?
Yesterday I passed some time on the breadboard, because recently I found some germanium transistors: ac187, ac184, ac181 and a couple of other types I don't remember now. My first germanium transistors.
I wanted to breadboard just a simple booster... just to try and ear what the fuss is about.
I had no success, they seem very difficult to bias; silicon transistors has always been very forgiving for my mistakes.
As usual I started kidding and finished with a strange schem: a 1uF cap on the...
My russian, however, is crap. So I don't understand what the hell is going on! Can anyone explain what exactly the article is on about? Would it be possible to adapt one of these stages into a 9v tube type booster?
Hey everyone, I'm a newb at this and have a simple question. I'm trying to build a General Guitar Gadgets JOAM (Jack of All Mini-Boosters) Boutique Boost. This pedal requires 2 2N5457 transistors but SmallBearElec.com sent me 2 2N5458 transistors instead of 2 2N5457 transistors. It seems like the pedal is based around these two transistors so I just want to make sure that the 2 2N5458 transistors are identical to the 2 2N5457. Thanks!
hello - just wondering if there exist any conventions of what colour wire you'd connect to what leg of the various types of transistor? Anyone have a model they follow or is this just stupid?
Mark
No, sorry there a no myths to debunk, even after RG's Technology article. Because as with the wah technology article, in de midst of his mathetical deductions, there always a weak mojo or sweet spot. Or it's something we heard from Fuller.
In the wah article, Mr Mojo appears in the guise of a faulty inductor which interacts postively with a fuzz face and can never be recaptured cause no modern inductor has those faulty characteristic anymore (except Teese?). In the Fuzz Face article, the...
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