Building an B-15-inspired amp
Hello, everyone, new kid on the block here After some tube amp reparations, fixes and minor upgrades (re-capping, fixing bias problems, various.....
distorting tube amp
i have a tandberg 74b that i just received second hand - everything on the inside is original, excluding previously replaced tubes. when it first.....
211 SET 40W output design and mfg
An amp that uses 211 or 845. It puts out just over 40 watts. The tube must run in A2 to get this power, which is not a problem with a good driver. The secret is...
volume loss on tube amplified reel to reel player
i have a fujiya fl-555 (schematic attached) that i am having problems with. the recorder`s volume is very low even at maximum setting. it was working.....
Sophia Electric EL34 Schematic
I have finally worked out this schematic as an exercise to learn about amps. There are a number of things i am not so sure about and would appreciate.....
Tube amplifier
Hi everyone, just wondering as I am about to build my first tube amplifier is the attached design o.k. and also does anyone know a suitable.....
Tips/comments for upcoming 300B build
After much reading and discussion, I think I`ve settled on the plans for an upcoming build for a single-ended 300B integrated amplifier. The circuit.....
807 Tube Triode Connected
This is a very nice amplifier design and it is very difficult to improve it. I am glad about the results because that's a very good way to verify my 6DJ8 and...
Very low output from Knight KN928
Ty- Regarding your updated drawing of the AF/PI stage: - I don`t think R45 exists? - The disk cap bypassng R44 is labeled 68NF750 10% which I assume.....
211 SET amp built
The amp appears to be unused, still has the plastic film stuck to it. One of the 211`s has a loose component rattling around inside so we will need to get one o...
300B solid state
Classic 6-Transistor circuit (many variations of this where around in the 1960`s & 70`s), NPN only output devices, fairly high level of Bias, single rail, input...
Zero Feedback Impedance Amplifiers
Dear Susan, your amp is similar to this one which has even a lower parts number. It deserves to be built!.....
TUBE/MOSFET/BJT hibrid amp
Because i cant get help with this in tubes/valves section, i`m opening thread here with HOPE , that SOMEONE whould be able to HELP ME. I need help.....
Irf510 mosfet amp
Hello, I am new to electronics. It has recently become a hobby. I have built a few guitar pedals and small amps. My project I`m working on now is an.....
Easy and low cost IRF540/9540 amp
Hi all, I completed my first amp a few months ago. It was more a test than really something to listen to. It used the 9240/240 Mosfets. Now I want to.....
DC Servo MOSFET Amplifier
Apex seems i begin to love this amp the corrected clear schematic is this with different R14 values(tried 22k,30k,56k) and different supply.....
Triple Emitter-Follower as OPS for the Aikido
Hi, I`m working towards an hybrid amplifier where the VAS will be the Aikido, where the OPS is some Emitter-Follower variation. Unfortunately my.....
Current-Amp to drive bass guitar cab
Hi! I have a 4x10"" Ashdown ABM bass cab driven by a Hughes&Kettner bass top. I just had the idea of modifying the bass top to act as a.....
Crescendo ampilifier elektor1982
The Elector Crescendo was my first DIY amp that wasn`t a kit. I borrowed the Elector magasins at our local library and had some `amateur` make the.....
Tripath Board tc2000+tp2050
Originally Posted by Neil Davis It`s not a sim. It`s a real measurement from a circuit that has basically the same topology as the Tripath data sheet. .....