Tubecad com select 2 ) Jul 29, 2016 · For those of you who still have old computers running Windows XP (32-bit) or any other Windows 32-bit OS, I have setup the download availability of my old old standards: Tube CAD, SE Amp CAD, and Audio Gadgets. Jul 23, 2018 · The Tube CAD Journal's first companion program, TCJ Filter Design lets you design a filter or crossover (passive, OpAmp or tube) without having to check out thick textbooks from the library and without having to breakout the scientific calculator. 828Vpk) or with 2. The MOSFET's high transconductance provides a low source impedance that locks the triode's plate at a fixed 100 volts, which serves to preserve much of the 6DJ8's ES HPA-1 and ES HPA-2 and PS-8 I have decided to finally release for sale these two PCBs and the PS-8 power supply. Thus, the first stage needs to provide a gain of at least 35, and if feedback is used, something like 250 would be better. Downloads: free; All other items are shipped at a flat rate; for example, 10 PCBs are shipped at the same low rate as one PCB. I ran out of the switches a few months ago and none were available until recently. 5 inches long). The old Triad R-8A transformer that I used holds three secondaries: 5Vac@2A, 6. 4in by 6. Includes TubeCad "Select-2" three position rotary selector switch. Its internal OpAmp controls the 12B4 pass device's current conduction. Open the tube type you want to make active, select definition Subckt and then assign A for plate, G for grid, K for cathode and S for screen in the case of a tetrode or pentode, just AGK for a triode. Like the new Rev E. In AutoCAD, the Chamfer Edge command allows you to create a beveled or chamfered edge between two intersecting surfaces or between a surface and a solid obje Standard USPS Priority Mail is $7. 5A equals 6. Jul 29, 2021 · 29 July 2021 Post Number 541. Solving the second problem, having the triode grid near the -300V power-supply rail voltage, requires capacitor coupling both the input signal and the signal ground. So, how close did we get to 50% efficiency? (I plan on using an A5 stepped attenuator—with -1dB & -6dB steps and carbon-film resistors —with a 6SN7-based ACF-2 and a Logitech Squeezebox receiver as the only signal source. Notice how all three drivers, woofer, midrange, and tweeter, experience first-order slopes (i. Jan 1, 2017 · For those of you who still have old computers running Windows XP (32-bit) or any other Windows 32-bit OS, I have setup the download availability of my old old standards: Tube CAD, SE Amp CAD, and Audio Gadgets. Feb 15, 2023 · Designers and constructors here on diyAudio typically use LTSPICE for circuit simulation. 3mA through their cathodes. The input voltage is about 2 volts peak to peak. 4k primary impedance further implies an output power of 12W. Bob Cordell found that the diode voltage drop reduced by -1. Many of the most popular boards are back in stock, such as the Janus and PS-1 regulators, the Aikido phono and Tetra phono stages, the mono noval and octal Aikido boards, the Aikido LV, the ACF, the Select-2 and Select AC switches, the H-PS-1 and PS-3 and PS-4 Considered by The Absolute Sound as one of the ten most important amplifier designs of all time, the CAD-805 continues its legacy with the Reference Series CAD-805RS, epitomizing SET mono-block amplifiers' excellence. Jun 24, 2024 · Tube CAD is the tube audio circuit computer aided design program from GlassWare for Windows 9x/Me/ NT/2000. The following circuit uses a rotary switch (GlassWare Select-2) to allow the BCF-2 to choose between two unbalanced and one balanced input signals. Number of Outputs: 2 Operating Temperature Range: 0 C to + 130 C Product: PCB Mount Transformers Termination Style: Solder Pin Type: Low Voltage P. Thus, the need to be frugal with the number of switches used. Click on schematic to see enlargement The CD and FM signals pass through passive 500Hz filters and undergo -6dB attenuation. 1µF capacitor, we choose between low-frequency bandwidth down to 3. 21 December 2010. Jun 16, 2017 · Join our Lazy Arquitectos and work smarter, not harder 👉 https://lazyarquitecto. By using four zener break voltages, we can select the shunt regulated driver-stage voltage in 25-volt increments. Using a GlassWare Select-2 selector switch allows us to select between three signal sources, both the hots and the grounds. Still, Tube CAD Journal readers were building 24V Aikido line stage amplifiers and loving the results. Just click on the links to take you to Issue five of the Tube CAD Journal for tube audio circuit design. com/courses/autocad-essen Select and bend individual tubes from assemblies. " The Tube CAD Journal's first companion program, TCJ Filter Design lets you design a filter or crossover (passive, OpAmp or tube) without having to check out thick textbooks from the library and without having to breakout the scientific calculator. The following circuit allows the BCF-2 to select the phase of its output signal with an unbalanced input signal. Tube CAD helps a lot but some things need the attention of the algorithmic genius himself. 2-inch tweeter or a 2-inch dome midrange could be used as the mid-tweeter. This program's goal is to provide a quick and easy display not only of the frequency response, but Tube CAD. In other words, this is a special capacitor selector switch that is designed to work within dual-mono setups, either line-stage or power amplifiers. Mixed-Bias Some men wear both a belt and suspenders. e. L1 = 1000·R/(2·¶·F1) L2 = 1000·R/(2·¶·F2) Note how the midrange is shunted by both a capacitor and an inductor. Power = I² × Rload/2 . Tube CAD Journal: Tube regulators part 2, July 1999 Mar 2, 2014 · New Select-5 Signal Selector Switch I have a new signal selector switch, the Select-5, which—in spite of what its name seems to imply—allows you select between four input signals and four signal grounds. I turn off the connection to a network so windows won't mess with it and try to keep doing updates. New Attn-2. The ES HPA-1 uses a noval input tube and an octal output tube, while the ES HPA-2 uses noval tubes I both positions. Learn AutoCAD right from scratch and get a certificate of completion when you finish this completely free course https://sourcecad. Aikido PCBs, the PH-2 uses only polypropylene power-supply reservoir capacitors in its four power-supply RC filters. Tube CAD is intended as a guide to understand and design tube audio circuits. Populated with Dale RN60 Mil-spec metal film resistors. This program's goal is to provide a quick and easy display not only of the frequency response, but Nov 14, 2022 · SOLD: Goldpoint Mini V series stereo stepped attenuator. Note that the top triode doesn't get a cathode resistor and the bottom triode's cathode resistor is bypassed by a large value capacitor. 2µF/630V capacitors polypropylene capacitors. The Tube CAD Journal's first companion program, TCJ Filter Design lets you design a filter or crossover (passive, OpAmp or tube) without having to check out thick textbooks from the library and without having to breakout the scientific calculator. Imports round, square, rectangular, or oval tubes. -6dB per octave) throughout, much like the parallel three-way crossover. Board Mount. These last two voltage outputs also use RC filtering that hold 47µF/500V capacitors, bypassed by 2. Updated Aikido LV and 12Vac Aikido PCBs Both the the Aikido-LV and Aikido 12Vac PCB are in a new revision. 1 + 0. Since a picture is easily worth a thousand words, here is what I imagine the back of a stereo power doubler would look like. In addition, it offers low distortion and noise (2. 95 for each program. A voltage drop of 30V across the 300-ohms cathode resistor implies an idle current flow of 100mA for the output tube, which against a 2. I am not aware of any circulation of tubecad files in this way. Tube CAD includes 13 types of tube circuits, divided into four variations each-52 circuits in all. If you have been waiting for many of the GlassWare switches, such as the Select-2 andSelect-AC, to be in stock again, your wait is over. 3Vac@2. Midpoint: The inner/outer radius of the tube circumscribes a circle of that radius. Nov 22, 2021 · In addition, this switch differs from the stereo Select-C in that the Select-CM offers four positions: mute, C1, C2, or C1 & C2 in parallel. 5A, and 250V-0V-250V CT @ 75mA. Vertex: The inner/outer radius of the tube is inscribed by a circle of that radius. 8k series resistors. 4in large and two are required for stereo listening. 100K. May 13, 2024 · For example, users of Math CAD who would explain how they found the program useful write many of the articles. Your response will be appreciated. 5V voltage drop, hence a constant-current draw of about 10mA. Below is a one possibility. Learn how to use CAD/CAM software and follow some best practices for tube bending design, such as 3D modeling, bend optimization, code generation, and simulation. How so? We use the formula . Okay, let's do the math: 5V against 1. Default UI Menu: Modify/Modify 3D Objects/Bending/Tube Bend Ribbon UI Menu: Bends a solid (ACIS) cylinder. Tube Form Solutions is a major re-seller of the BendPro Tube Bending Software and CNC bender controls. Author Topic: TUBE CAD (software) (Read 11213 times) 0 Members and 1 Guest are viewing this topic. Mar 6, 2025 · Just load a 32 bit copy of windows (either 7 or 10 is best) in it and then load your Tubecad and any other16 or 32 bit programs that won't work in 10/64. The FedEx truck left the 40lbs box on my porch. 64)² x 8/2, or 6. 8k is a standard 1% resistor value, but not a 5% value. 5V voltage headroom to maintain regulation in the face The answer is found by doubling the idle current, then squaring the sum and multiplying the product by half of the load impedance; namely, (2 x 0. See post 335 for details on who the lovely lass is in the photo shown above. A filter can also consist of twenty resistors and twenty capacitors and many amplifiers. Thus, 0. Select Capacitor Mono Select LSA/HPA Switch and PCB Select-4 Select-5 Select-Phase SRPP Line-Stage Amplifier SRPP+ Noval Stereo-Freq Capacitor Switch Stereo-Mono Switch TCJ Filter Design - Download TCJ My-Stock DB - Download TCJ Push-Pull Calculator - Download Testimonials Tetra Sans PS & User Guide Tilt Control Tilt-2 Control Tone Controls Tr Using a GlassWare Select-2 selector switch allows us to select between three signal sources, both the hots and the grounds. When an 8-ohm loudspeaker is attached to the 8-ohm output, the IMC ratio is 1-to-2, as 0. com/courses/autocad-essen Author Topic: TUBE CAD (software) (Read 11213 times) 0 Members and 1 Guest are viewing this topic. Level 2; Posts: 165; TUBE CAD (software) New PH-2 Phono Stage I have replaced the old PH-1 with the new PH-2. The workaround is to carefully read the driver's specification sheet. The Tube Cad program has a circuit that uses a triode based "pseudo CCS" as the plate load for the amplifier tube. 5V voltage difference between its anode pin and its reference pin, which means that 249-ohm resistor sees a fixed 2. The TL431 strives to see a 2. I am an Electronic Engineer BTW. Mar 7, 2023 · In addition, this switch differs from the stereo Select-C in that the Select-CM offers four positions: mute, C1, C2, or C1 & C2 in parallel. Stereo and mono, octal and 9-pin printed circuit boards available. But how do we select the right capacitor values? The first Tube CAD Journal issue held the answer in an article titled Improving the Cascode's PSRR. In fact, Morel make a driver that holds both a 1-inch tweeter and a 2-inch dome midrange on one and the same faceplate and in close spacing between the two, the TweeMid TM 4055-8. Jun 5, 2022 · In addition, this switch differs from the stereo Select-C in that the Select-CM offers four positions: mute, C1, C2, or C1 & C2 in parallel. The math is based on the √2, 2. The BCF-2 PCB and kit are available now at the GlassWare Yahoo store. Easily extend a straight tube section to an end feature before bending. C. By selecting between the normal 1µF coupling capacitor and a 0. SET amplifiers, characterized by their pure Class-A operation, distinguish themselves Feb 15, 2023 · Good Evening Gentlefolk, I am a newbie in this forum but an old hand at building tube amplifiers, unfortunately very old :-(. So far it sounds terrific. So, my guess was a tad pessimistic. Both PCBs are 3. The pandemic has disrupter supply chains in the electronics industry—no news there. 3Vac winding is voltage doubled and then powers the 12Vdc heater regulator; and the 500Vac CT provides the B+ voltage. This program's goal is to provide a quick and easy display not only of the frequency response, but The radio and TV set are filters of sorts, as they select only a narrow band of frequencies at a time. 25W. If you've ever wondered what a cascode or SRRP circuit is all about, or were curious about the pros and cons of competing circuit topologies, Tube Cad tells all. By using floating RCA jack grounds and a differential line stage amplifier, if you like your interconnects, you can keep your interconnects—but this time it's true. Speaker Diffraction Loss While writing my last post, and while looking at the first of the two passive RIAA equalization networks, the shelving network that boost the lows below 50Hz by 20dB and then fell off at 50Hz before flattening at 500Hz, I noticed an exact 9:1 ratio between the two resistors in the shelving network. 2 / (0. 95 to Canada and $33 everywhere else. Unlike the high-pass version, this filter is entirely an active 3rd-order design. The downloads are at the GlassWare-Yahoo store and the price is only $9. I simulated this circuit and found that it could give the required gain and almost the required output impedance. The 5Vac winding is used to power the 5Y3 rectifier; the 6. In addition, each channel's heater power supply connections are separate. . Aug 28, 2024 · The Tube CAD Journal's first companion program, TCJ Filter Design lets you design a filter or crossover (passive, OpAmp or tube) without having to check out thick textbooks from the library and without having to breakout the scientific calculator. They are good for experienced folk and great learning tools too and the learning curve is way below the effort to learn pspice. << Prev TUBE CAD JOURNAL Next >> Pg. If the output voltage drifts upward, it conducts more current until the voltage developed across the series resistor pushes the voltage down to Mar 11, 2010 · The transformer's primary leads attach to one of my Select-2 signal selector switch PCBs and the secondary to my 20k Elma-based three-switch attenuator. 5 volts, which it uses to compare with the output voltage after this voltage has been reduced to 2. Either a 1. ) Select-4 One of the best sellers at the GlassWare-Yahoo store is the Select-2 three-input signal selector switch and PCB. 1) equals 2. 2A equals 6W; 2. The Aikido-LV got the bigger change, as it can now either use a single DC voltage, say 48Vdc, to power both the tubes and the heaters, assuming four 12-volt heaters in series, or it can use two power supplies, a high-voltage one, say 48Vdc to 100Vdc, and a low-voltage one It comes with a precise, internal voltage reference of 2. Almost all of the shared simulated circuits posted here are LTSPICE files, including tube amplifiers. Level 2; Posts: 165; TUBE CAD (software) Learn AutoCAD right from scratch and get a certificate of completion when you finish this completely free course https://sourcecad. Remember that each channel must get its own rectifier bridge and RC filters. Start with a cylinder, and activate Tube Bend. 2 Of course, if both tones had been at frequencies below the 500 Hz crossover point, as they select only a narrow band of Clicking on any of the 17 filter choice buttons, causes the program to find and display the appropriate filter. 18 April 2015 . Welded Tube Pros is an authorized United States reseller for BricsCAD design software. Broskie is a great resource and does so much for FREE! I hope no one sends this guy a knock-off. 55W. I love this signal selector, as it Aug 15, 2023 · What is needed is an input-signal selector switch like my GlassWare Select-2 switch that holds a 3-position, four-pole rotary switch. 55W is the maximum amount of class-A watts into an 8-ohm load. 2 and dividing it by 0. B The Aikido PH-1 returns—and yes, it has been a long, long time. The GlassWare Select-C switch is perfect for selecting either coupling capacitor or both in parallel. (I could place a 60k resistor in parallel with the attenuator to bring the load impedance down to 15k, but I haven't felt the need to experiment. Attn-2 Stereo Stepped Attenuator Stepped attenuators deliver decisive clicks and precise attenuation. Apr 8, 2021 · — Since 1999 — Welcome to over 550 posts and to over 50 articles on amplifiers, tube-based preamps, crossovers, headphone amplifiers, single-ended amplifiers, push-pull amplif Well, actually half of the shipments are here; the other half is due to arrive Saturday. Jun 16, 2005 · In the tool bar open windows, select component editor, click on analog library, then tubes, and you will see pentode and triode selections. The next offering is the new Select LSA/HPA rotary switch and PCB, which allows you not only to select where the output signal goes, but which capacitors are used for each task. The idea behind the Select-C switch was that you could choose between two different types of coupling capacitor (or place both in parallel). But, so as not to offend the overly sensitive, let us use a 6N1P instead. And the drop-down box below the buttons is used to select the desired filter alignment. 1² times 2400/2 equals 12 watts. We can use the internal diodes, along with the diamond's self-correcting immunity to temperature shifts, to create an auto-bias scheme. 2 in the USA and $23. I have the House-GND, Select-2, Select-5, Attn-12, A3-Mini, Front Panel, Dual/Bipolar LV-Reg, PS-1, PS-21, PS-22, LV-Reg, PS-9, PS-Tube-SS, Aikido Noval Stereo, Aikido Octal Stereo, 12Vac AFC PCBs—and a few new PCBs. Nov 13, 2016 · In addition, this switch differs from the stereo Select-C in that the Select-CM offers four positions: mute, C1, C2, or C1 & C2 in parallel. PCBs At Last! I came to doubt that the boards would ever arrive, I must admit. 5V against 2. Also instead of using a split rail I want to use a JFET in a grounded gate setup with something like 500 ohms on the drain. 0047. This program's goal is to provide a quick and easy display not only of the frequency response, but Capacitors C1 and C2 voltage divide the power supply noise according to the inverse ratio of their values, but allow the same DC voltage division to obtain. 1mV per C °. In contrast, 4-ohm drivers can either be measured with 2Vrms (2. That is an amazing amount of tasks for a three-pin IC to perform. Input stage The input stage is most important, as its noise and distortion will be paramount. For those of you who still have old computers running Windows XP (32-bit) or any other Windows 32-bit OS, I have setup the download availability of my old old standards: Tube CAD, SE Amp CAD, and Audio Gadgets. 828Vrms (4Vpk), which is a dang shame, as 2. Point 2: Radius 1 (inner or outer) Point 3: Length of the tube Point 4: Radius 2 (outer or inner) Specify the number of sides or facets around the tube. For example, if the cathode-to-plate voltage is 150 volts and the total idle current draw through High-quality, double-sided, extra thick, 2-oz traces, plated-through holes, dual sets of resistor pads and pads for two coupling capacitors. 828Vrms across a 4-ohm resistance equals 2W, not 1W, making for a false +3dB boost in SPL. Note the lack of cathode resistor bypass capacitors. $90 shipped conus, +$10 worldwide. Sadly, they are never cheap—well, at least the high-quality ones are never cheap, as the sealed switches with hard-gold contacts are expensive in the extreme. Aug 15, 2023 · What is needed is an input-signal selector switch like my GlassWare Select-2 switch that holds a 3-position, four-pole rotary switch. But if Missouri is the "Show-me state," I could be the “Play-it-for-me audiophile. The equivalent Goldpoint unpopulated attenuator switch is $123 today. The problem with heating a 2A3 with DC is that the rectifier losses become a much larger issue. Now we finally arrive at what I plan on setting up. Two unbalanced inputs and one balanced input per channel. This program's goal is to provide a quick and easy display not only of the frequency response, but The Tube CAD Journal's first companion program, TCJ Filter Design lets you design a filter or crossover (passive, OpAmp or tube) without having to check out thick textbooks from the library and without having to breakout the scientific calculator. 7mV per C ° increase in temperature, while the transistor base-to-emitter voltage dropped by -2. Select the cylinder you want to bend. 7nV/√Hz) and whose output can swing to one volt of the power-supply rail voltages. In addition, this switch differs from the stereo Select-C in that the Select-CM offers four positions: mute, C1, C2, or C1 & C2 in parallel. R1 = R2 = R3 C1 = 225079/R1/F C2 = 562697/R2/F C3 Aug 12, 2022 · For those of you who still have old computers running Windows XP (32-bit) or any other Windows 32-bit OS, I have setup the download availability of my old old standards: Tube CAD, SE Amp CAD, and Audio Gadgets. In the box, we have Aikido Octal Stereo, PS-1, Select-2, Tr-PS-1, Front Panel and B-1 attenuator PCBs back in stock. From GlassWare the publishers of tube audio design software. Aikido Phono preamp, Rev. com/membersWHO AM I:I’m Irving, an AutoCAD certified professional with a wee Mar 6, 2025 · Just load a 32 bit copy of windows (either 7 or 10 is best) in it and then load your Tubecad and any other16 or 32 bit programs that won't work in 10/64. six el six. Apr 15, 2023 · For those of you who still have old computers running Windows XP (32-bit) or any other Windows 32-bit OS, I have setup the download availability of my old old standards: Tube CAD, SE Amp CAD, and Audio Gadgets. And the new PCB is half an inch shorter (10. 2Hz or 32Hz, assuming an input line-stage amplifier impedance of 50k. No problems here. Thus, it gets its own decoupled power supply connection. Each time a new filter is chosen, the user-definable part list is displayed in the Circuit Element choice box of the program. The CAD part of its name means exactly that: computer aided design. Well that was the intent, but the Tube CAD Journal went off in another direction altogether. 5 √2, and √2/3. Mar 11, 2018 · It differs from the Select-C switch in that it offers three positions: coupling capacitor 2, mute, and coupling capacitor 1 and 2 in parallel. By the way, 2. Anyway, I read an article about TubeCad and decided to get back in the game and so I set up a virtual machine on my computer, 32bit Windows XP especially to run TubeCad. A filter can be made out of as little a single capacitor or inductor (and a load resistance). Mind you, 6. 5 capacitor ratios. Part of the reason was that many of the tube fanciers needed, as you pointed out, to be technically brought up to speed. Jul 19, 2015 · The new Select-CM allows you to do this in mono. One PS-8 power supply will easily power two electrostatic amplifier PCBs. Feb 4, 2008 · For example, I like running my 12AX7s with 250V on their plates and 1. But they are here and they look good. Spend a few bucks and support the cause. BricsCAD software is a native DWG format CAD program with all the functionality of AutoCAD at a 1/5th of the cost. 5 volts by a two resistor, voltage divider. Here are the resulting frequency plots. I will use my select-2 PCB and rotary switch to achieve the following setup. Moreover, even if we use a low-drop-out (LDO) voltage regulator, the voltage regulator will need at least a 1. BricsCAD Design Software . For example, you might have a CD player, FM tuner, phono stage, and iPod as your signal sources. Oct 25, 2003 · I have both the Tube Cad and SEamp Cad and both are excellent. Feb 9, 2005 · hundred of them (scores of Siemens and Amperexs) that I can hand select good ones. Its circuit and parts upgrades ensure it remains at the benchmark for SET audio performance. Mar 30, 2023 · In addition, this switch differs from the stereo Select-C in that the Select-CM offers four positions: mute, C1, C2, or C1 & C2 in parallel. This program's goal is to provide a quick and easy display not only of the frequency response, but The attenuation is not as great as it was when the shunt regulator was looking backwards at the power-supply noise created at the rectifiers, as the ECC99's transconductance was reduced by the two 2. Sweet.
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