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Skip to the content AUDIO WORKSHOP DIY audio blog for projects, schematics, PCB's, designs, electronics, mods Toggle the mobile menu Toggle the search field Index Blog About Search Index Blog About 6SN7 Preamp With DN2540N5 or IXCP10M45S By Ventsislav Simonov On May 16, 2021 In Tubes Here is an article to show how I designed my 6SN7 preamp with CCS based on DN2540N5 or IXCP10M45S D-MOS transistors. The article is an addition to my design which showed a 6SN7 tube in parallel connection . Here I will continue to develop the schematic. I will introduce a popular solution for a reliable constant current source. 6SN7 preamp. DN2540N5 or IXCP10M45S. PCB 3D rendering. Read More 6SN7 Preamp With Parallel Sections + CCS By Ventsislav Simonov On April 30, 2021 In Tubes Here is my design of a 6SN7 (6N8S) based preamp with parallel sections of the tubes. I plan to use just two tubes, one for each channel. As we all know 6SN7 is a double triode and for my design I will tie the two sections in parallel. The main design parameters fall into three points – low-distortion, low-gain and low output impedance without using a output buffer/cathode follower . In order to achieve some of these goals I will be using an active load – constant current source(CCS). Setting the bias point First of all lets begin with the obvious – setting the tubes into the desired operation point. Lets consider a fairly typical power supply voltage of around 300V and a 30kohm plate resistor which results in a plate current of 10mA. From these three values it’s easy to draw the load line, so here’s what it looks like: 6SN7 Load line and biasing Read More Tektronix SG505 low-distortion audio oscillator By Ventsislav Simonov On April 18, 2021 In Measurements The Tektronix SG505 instrument is an ultra-low distortion and low-nose oscillator intended for testing of audio grade electronic products. This one came to my possession as a non-working unit and I set-out to fix it. Front view Read More The LPRO-101 DIY Rubidium Clock Generator By Ventsislav Simonov On September 15, 2019 In Digital The DIY LPRO-101 ruibidioum clock generator. This box together with some additional electronics on a separate PCB will transform this LPRO unit into stand alone equipment. I’ve always wanted a good and affordable frequency standard for my home lab. Searching the eBay one might find quite a lot of solutions. The good thing is that nowadays we have plenty of options. Read More Low-noise Power Supply By Ventsislav Simonov On February 22, 2018 In Power supplies Here is a quick article describing a low-noise power supply for low current applications. It’s simple, and easy to build. All parts are widely available and cheap. I’m using this power supply to power-up my RIAA preamplifier. It’s more that capable of delivering excellent results. Build one and try it for yourself. First of all lets see the basic functional diagram of the regulator. Positive voltage regulator: Read More Page 1 of 10 Next Search Subscribe Enter your email address: Delivered by FeedBurner Popular Posts ESS ES9023 SABRE DAC BOARD 34 comments Diamond Buffer Headphone Amplifier 22 comments uPC1237 Amplifier/Speaker Protection Module 16 comments TPA6120 Headphone Amplifier – COMPOSITE TOPOLOGY 15 comments DIR9001+TDA1541A Classic NOS DAC 13 comments Recent Posts 6SN7 Preamp With DN2540N5 or IXCP10M45S May 16, 2021 6SN7 Preamp With Parallel Sections + CCS April 30, 2021 Tektronix SG505 low-distortion audio oscillator April 18, 2021 The LPRO-101 DIY Rubidium Clock Generator September 15, 2019 Low-noise Power Supply February 22, 2018 Privacy Policy Therms And Conditions Contact Us Spam Blocked 515,612 spam blocked by Akismet Powered by WordPress & Theme by Anders Norén...