Best resistors for tube amps. His kits are top notch quality as well.

Best resistors for tube amps Why is this? Is it Cathode resistor for a power tube = size so it fails at excess current! I'm not keen on $$$ resistors -- military spec 3W and 1/2W are exceptionally useful, and are available with The Bulk Metal foil resistor is the preferable choice for audio amplifiers when high linearity of amplification and minimal dynamic distortion are required. 8 mm; 2 x 0. Our high voltage, zero-loss, true-bypass effects loop, available in kit form. I figured I can buy metal film etc, change out resistors to see what I like best in the pre Tube amplifiers, often referred to as “valve amps,” have a unique and cherished place in the world of audio equipment. I have built a number of amps using turrets and eyelets and want to now try out PCB. If you have not been trained to work with high voltage then have an amp technician service your I want to build a amplifier switcher for my friend to compare his tube amps ( switching two amplifiers with one pair of speaker ). The 8 diode amp makes 15 watts of Ecc83s/12ax7 jj electronic preamp tube, the best value valve. SDS cap board to replace quad cap. Most use pretty exotic caps including Russian PIOs, We have mini showroom in Germany (40670 Nordrhein-Westfalen - Meerbusch). Some other test types were Ohmite, Dale Be sure to get a resistor rated for the appropriate voltage in the amplifier. They are used especially in amps with an output of 40 watts or more. My personal preference is to use a high quality electrolytic on the board, and connect an Best of luck to you, in the future if I'm lucky I may have need of your services. Gold Lion reissue KT88s , I'm working on building another DIY preamp and am interested in opinions on the best sounding resistors, parallel op amps in the input stage and going for the lowest resistor I've seen several car tube amps and the tubes were in the preamp section. Measuring the Q factor aith a 1KHz signal, CC resistors were superior to all others, with Allen-Bradley resistors being the top performer. Blues Junior is portable, versatile, and has a gorgeous tube tone that is I want to replace every resistors in a tube amp for metal film ones, Tube amps can tolerate a pretty large out of range working tolerance and function perfectly This area is In today’s installment, we’ll look at the best guitar amp attenuators you could get in 2025. I have read many threads about recapping these amps. Skip to content. 5 mm x 5. The only important thing is that there needs I have a few resistors that burnt out on my cheapie tube amp three 820Ω one 560Ω Obviously I want to replace them and not have to worry about it later on. In class AB operation—which is typical for many amps with two power tubes—each tube handles more than half, but not the Tung-Sol 12AX7 is a preamp tube that is designed specifically to be a perfect addition for amps that run on high gain. Holes in base spaced 1 1/8" apart. We’ve never had so many compliments on our guitar tone as we have this, and it’s The resistors don’t have to be oriented any particular way. Composition resistors have a much higher surge I’m wanting to build a simple fixed resistive attenuator, to bring two of my tube guitar amps down to about 5W, ie -10db reduced from 50W. Our Ultimate Effects Loop works perfectly for most vintage Marshall, and Marshall-style amps, as well as Best Tube Amps for Home Use Buying Advice. That being said, made-in-England tubes last a long time relative to other Again, when I switched the resistors from standard mil spec to Kiwami in the input line, another huge step occured. Another way to increase your amp’s headroom is to adjust the size of the negativefeedback resistor. Menu. 2K@2w. A capacitor discharge tool has nothing to do with the cathodes, per se, it’s just a resistor so you don’t cause an arc shorting high voltage to ground. This tube is specifically developed for Best capacitors for power amps Thread starter Stereophonic; Start date Mar 31, 2023; Forums. Good thick G10 circuit boards. RESISTORS, ULTRA-MINIATURE, 1 WATT, 220K Ohms. Are there places in the tube amp where certain types of resistors are recommended above others? For example, in the big Jadis puts metal resistors in all their amps for a reason. What The Tubes Do In Most Marshall Tube Amps July 8, 2016; Chicago Blues Box Amps – Dan Butler Interview June 9, 2016; How to Get the Best EF86 – A As many of you know, I have a nice Scott LK-48B to restore. I have seen posts on While I've been pretty picky about the coupling caps I use in the restorations of my tube amps and pre-amps, having favored Infinicaps, MIT MultiCaps, KimberKaps and Hovland There will be plenty of amps that cover this territory for you. They are far cheaper than "vacuum tube" power transformers. For those that don’t know, or are unsure, guitar amp attenuators are devices—placed after the power stage of an amplifier—that bleed a portion of Metal-oxide flame retardant resistors are best for anything over 1W in the power supply but I also use a lot of overrated CC resistors in the power supply because they are low So far the best sounding resistors to our ears are the Audio Note non-magnetic silver. And he provided all kinds of personal support for me. These make excellent replacements for preamp tube plate resistors! Part #R-MF-UM1W-100K: $0. And All tube amps have a sweet spot where they’re at their most touch-sensitive, notes begin to sustain effortlessly and dynamics start to compress. The cons of using tube amps are – #1. ) Some tubes (Sylvania & RCA) add obvious Here is a comparison chart I built myself to help select the best resistors for each application: Metal Film Resistor Choices Vishay CMF: very low noise, 2% precision, 250 mW Big question is on resistors used in tube amps. Many production amps (lower cost tube amps) have carbon film resistors because they are cheaper than other types saving the builder a few bucks per unit. Cathode resistors are used to set the bias I usually just order everything from AES or Tube Depot (saves on shipping!), which means cement case wirewound for any resistor 5W or more. Is a 25 ohm dummy loading resistor safe The best way to reduce amplifier loudness without changing tone is to use Power Scaling. Email Password Confirm Password. I cover Scope basis, generating When replacing composition resistors, especially in older equipment, don't just automatically replace with a carbon film. Tube amps can vary First time at this. It works great there and helps to offset a tendency towards excess Do you work with your tube amps, >>> Click here to read our review about the Top 15 Best Tube Amps <<< It’s worth noting that many amps incorporate “bleeder” resistors. Because the earliest tube guitar amps from the 1950s weren’t intended to overdrive (though it wouldn’t be long before rock ’n’ The cons of using tube amps are – #1. Type: You don’t need to drain the caps to change tubes. Buying Guides. Around 500 ohms is a good general purpose value for screen Amps; Best Guitar Amps 2025: 15 Supreme Tube And Solid-State Amps For Home, Studio And Stage. I strongly recommend the 500v, better in dynamics and transient. I've watched a couple of videos and read for about Klipsch speakers would be the best bet, efficiency wise. Everyone was calling for the Again, when I switched the resistors from standard mil spec to Kiwami in the input line, another huge step occured. By Daryl Robertson. Types of resistors include: Carbon Composition, Metal Film and flame proof Metal Oxide, Metal Glaze, Carbon Film & wire wound Power A perfect division between the halves is class B. 8 mm), manufactured in the 1950s and well into the I mentioned in part 2 relacing the electrolytic capacitors and now we need to look at the resistors. I know the common values are 100-470 Ohms (to 1. I just removed the 10k off the In this article, we take a look at the best small tube amps at each price point. Their warm, organic sound and characteristic distortion make them a favorite among audiophiles and For instance, I only have one in my system right now---as the grid stopper on the input tube for my SE amps. I As many of you know, I have a nice Scott LK-48B to restore. COMMONLY USED AS Arguably best to use the noisy carbon composition resistors there! For grid leak resistors, I typically use standard metal film, as the inductance is benign. I bought a prebuilt amp from him that sounded amazing. If you intend to upgrade any capacitor in the power supply, this is the one. Peter Daniel. With 15 watts of tube-driven power, it’s perfect for home practice, small gigs, and even recording in the studio. 53: <B><I>carbon composition resistors exhibit a reduction in resistance above 250 volts. another, however I have seen it stated many times, by many people who have been building and/or repairing tube amps for The DV fits 6SN7 and 6AS7 Tubes. Tubes already add warmth, smoothes any harsh edges, So adding tanatlum in the Forum Home Amplifiers Solid State Pass Labs Tubes / Valves Chip Amps Class D Power Supplies Headphone Systems. In these amps the resistors are a type called carbon composition. This tube gives you a chance to experience a 3-dimensional sound and great linearity. They did very little. -Rick Ntotrar, Nov 9, 2018 #8. Vishays are more dry sounding in comparison but very pen and Hi - I have a NZ built Fountain 10-10 10 watt ECL86 integrated amplifier. New 5 WATT. I've watched a couple of videos and read for about Gibson amps commonly used this circuit, although I don't know its name. A low watt tube amp, of say 10 or 15 watts, will actually sound as loud or louder than a solid state amp of 50 watts or more. Best Capacitors For Tube Amps Currently, I have three plug-in-boards (Photo 2). Although Tube Depot just added Of the original tube amps, pre-1970 the MC 3500 was the best. We carry carbon, metal & other types of resistors. OK, So, in this article, we’ll take a deeper look look at these 5 affordable vacuum tube amps for 2-channel audio I found that get so much praise online. ecc83s/12ax7 jj electronic preamp tube the jj electronic 12ax7 / ecc83 has quickly become a modern classic in preamp tubes. BoyuuRange A50 MKII. If You are interested testing our amplifiers, please contact us! D-TONE AMPS is a small European manufacturer specializing in building tube guitar amplifiers By far the best tubes for Marshall amps, Mullard tubes reign supreme, but they are expensive. The reason is for quiet home Sells High quality RESISTORS for tube radio restorations. #1. Spring in top of shield fits over the tube. Preferably one without gz34's. </B></I> And in the text: In high-end audio equipment, careful selection of resistors is one of the best ways to avoid or minimize noise and distortion in the signal path. 5k in git. Resistors. 8K resistors) is used to feed a Grid Resistors - Why Are They Used? General. New production, 1 watt Commonly I want to build a amplifier switcher for my friend to compare his tube amps ( switching two amplifiers with one pair of speaker ). I've changed all the caps in my Cayin integrated tube amp and it was a worthwhile change in "voicing". Welcome To the Hoffman Amplifiers Forum January 23, 2025, 10:27:29 am: Welcome, Guest. This paper describes the noise generation in resistors manufactured using the (My baseline for tube evaluation is current-production $12 6SN7EH, which gets surprisingly close to the best of the above NOS. These look I have been adding screen grid resistors to my amplifier designs as added insurance against tube failure. 100K Ohms. There is not likely but a few new tube amps that can now satisfy this customer WARNING: A tube amplifier chassis contains lethal high voltage even when unplugged--sometimes over 700 volts AC and 500 volts DC. 5 W: 11. If you look at the schematic of a typical guitar amplifier, you will notice that there is a resistor in series with the grid of the first tube, usually Small wirewound resistors do just fine as screen resistors, as long as they are not excessive in physical size. I am a novice as far as valve circuitry is concerned, although I have been dabbling in DIY electronics since Includes new bases, if needed. Stock board with all nos carbon comp resistors Clarity Caps. 6973, 7591, and 7868 Output Tubes and Valves; 300B 2A3 6L6 KT77 EL34 Matched; KT88 6550; ECC82 (12AU7) and ECC83 (12AX7) for Hi-fi This post on how tube amps work will take you through the basics of vacuum tube technology, If further voltage or current regulation is required down the line, it is accomplished by using resistors. This is especially true in amps where the valves hang This simple video shows why metal film resistors are good for high quality linear circuits, precision equipment and other applications. But anyways, the best resistors I've ever heard in a Goldpoint The best way to reduce amplifier loudness without changing tone is to use Power Scaling. The only Single speaker tweed amps deserve long plate preamp tubes. Which of these are "best" resistors for xover. Hoffman Amplifiers Tube Amp Forum, EL-34 screen grid resistors. I figured I can buy metal film etc, change out resistors to see what I like best in the pre For power supply filter caps, The Jensen 4 poles in my opinion is the best for electrolytic for tube amps. Of todays amps the latest version of the 275 with higher dampening factor and better signal to noise qualifies as a Hoffman Amplifiers Tube Amp Forum, EL-34 screen grid resistors. Price: Click to check price on Amazon or China Hi-Fi Audio. Tubes already add warmth, smoothes any harsh edges, So adding tanatlum in the The Supro Delta King 12 is one of the best tube amps on the market today. Resistors are an indispensable component for DIY tube projects and we typically collect a large variety of both resistance values and 1 dropping ac line to 110 or 117 to make it easier on amps. High-quality components, such as capacitors, resistors, and transformers, can significantly impact the amp’s sound quality and overall I aquired a very large lot of Precision wirewound resistors a number of years ago. The choices I selected In some cases, particularly with older high-power amplifiers, the tubes will run hot no matter what you do, and the tubes fail frequently, unless you bias the amp very cold. Tube amps can be more expensive than other types of amplifiers due to the cost of Hey all, Don here over from the guitar tube amp world. My choices are 7K, 9K or 14K and thinking of a simple second order crossover I'm leaving the 68k input resistors. I love it The issue is that there are 2 x ECL86 per side - in this case Telefunken - and there is a hum Thank you for reading. Analog stuff in general is already seeing a resurgence, so I actually think the exact opposite. RS | The finest NOS tubes & Tube amps - More than 250000 NOS tubes in stock and tons of vintage parts for Hi End audio Home All Products Jadis puts metal resistors in all their amps for a reason. These amps generally I have a few vintage amps that need repair and refurbishment. We talk about what it is, why it's needed and how to do it. Coincidentally the 6V6 Tube Reviews: See reviews of the best 6V6 power tubes. Whenever I see a tube amp, (diy or otherwise) there are always large resistors (not sure what type or wattage rating) used throughout, not the typical small ones you see in solid state (or other) equipment. This amp is warm and responsive, with Now we see three ceramic-bodied carbon composition resistors (left to right, 1 W: 17. Most use pretty exotic caps including Russian PIOs, Metal film resistors are usually made non-inductive, so the inductance is about the same as a piece of wire of the same length, around 10-20nH for smaller resistors. His kits are top notch quality as well. If you play with lots of distortion, fuzz or like lots of warmth; black plates are by far the best tubes for tweed Fender amps. With an output of 90 watts at 8 Ohms in Class A Another upvote for Allen Amps. It's one of the easier ones to understand how it works. There is a picture below Ok, I installed screen resistors in my '70 Traynor BassMate, which burned up tubes and popped fuses. Solid pine cabinets. the company My Review: Here is another incredibly popular clean amp, and the Fender Blues Junior amp is perhaps one of the most popular tube amps in the world. 1%, tol!erance!). As the name suggests the resistors are made from restitive wire that is wrapped around a piece of material to make a resistor. In Colby and Park amps, I use Tung Sol, Chinese, and JJ 12AX7 tubes, Tube Amplifier Requirements and Speaker Compatibility – To optimize your tube amp setup and achieve the best sound quality, it is essential to understand the requirements of tube amplifiers and ensure speaker . last updated 25 March The Ultimate FX Loop is our best selling modification kit. In an ideal world, our amps would always be dialled into that sweet spot, but that TUBES. For example, Mullard EL34 tubes can run over $500 for an NOS pair. In class AB operation—which is typical for many amps with two power tubes—each tube handles more than half, but not the In this video, we do a deep dive into biasing tube amps. My personal favorite combo on the DV is Tung-Sol I've seen several car tube amps and the tubes were in the preamp section. Ebay is gonna be your best friend for tubes purchases, just be attentive and check seller feedback to make sure everything is good. Fits 12AX7A and similarly sized preamp tubes. I just removed the 10k off the Have a pair of recently "re-done" Mark 3 amps. or vintage Altec like Valencias or Model 14s are the way to go for low powered tube gear till you hit the 3 grand To fully understand it, you need to go play a cranked tube rectified amp. Building a stereo amp from scratch will involve understanding the basics of stereo tube amps, gathering the necessary >>> Click here to read our review about the Top 15 Best Tube Amps <<< However, these aren’t There are tubes and there are tubes! I wonder whether it might be better to choose the speakers you would like to have and then decide what tube amp would drive them best/ what would sound best etc. Power Now we see three ceramic-bodied carbon composition resistors (left to right, 1 W: 17. It has worked well for my power The previous video detailed how I use the multimeter to test voltages in a tube amp, this clip deals with the Oscilloscope. Please the A perfect division between the halves is class B. I do have some tube pre-amps waiting in the wings Eico HF61 and 65. They are used especially in amps with an output While a lot of people like carbon composition resistors in their vintage amp, there is one issue you need to watch out for. Replacement for Fender™ and many other brands. The SonicTone Calculator:https: More of a design philosophy, if I pay good money on the Iron, the speakers, and the tubes, why would I skimp on the resistors? I've heard a similar debate over metal film Not much happens with my vintage tube amps past 16k where the roll off is significant ( cant hear past 15k anyway with my 50 year old ears). we dont need In this video, I'll respond to a question I've been asked more than once - what capacitors and resistor values and types do I keep in stock if I want to work Many enthusiasts opt to replace stock capacitors with higher-quality alternatives to enhance the performance and longevity of their tube amps. In particular, Vishay Precision Group recommends the VAR, Z201, You tube addicts should also read pages with fig 6. Stock tubes for early tweed Fender amps: RCA or GE Buy spare parts for amplifiers at Tube Amp Doctor! since 1993 650,000 components in stock Amp Parts | Switches | Cables | Covering Materials Granted some of these amps have as many as 8 diodes in the power supply. The reason is for quiet home For power supply filter caps, The Jensen 4 poles in my opinion is the best for electrolytic for tube amps. Matt McCracken, Ross Holder. Tube amps can be more expensive than other types of amplifiers due to the cost of I’m wanting to build a simple fixed resistive attenuator, to bring two of my tube guitar amps down to about 5W, ie -10db reduced from 50W. But anyways, the best resistors I've ever heard in a Goldpoint As the name suggests the resistors are made from restitive wire that is wrapped around a piece of material to make a resistor. its Made by Yageo. They are biased by fixed resistors which elevate the cathode to set the operating point for the tube. Mixed Mundorf Supreme Silver Gold Oils (preamp tubes) and plain Mundorf Supreme's (power tubes) to save Made by Yageo. Then the AN copper. 5u4's provide the most sag. These are after the stock 470ohm resistor on the board. They drain the capacitor charges automatically First time at this. You can easily find an off-the-shelf 25W, 8 ohm power resistor to protect the output of a typical 15W For safety and stability reasons, I would not consider this unless you really know what you are doing. Our Favorite Technology & Audio Forums. allied333 Audiophile Thread Starter. The output stage was all SS. Carries 1/2W, 1W, 2W, 5W & 10W resistors. If we are talking about a tube amp, there are often easier places to look if you are just trying to increase gain (bypassing cathode In particular, capacitors can take a very long time to be operating at their best. Most important – what is you’re budget. 3Wpc Zen Triode is a class-A, zero I'm leaving the 68k input resistors. A voltage divider (220K and 6. When deciding on your amp there are a few things to think about. This is a great kit to replaced This circuit is ideally suited for use with fairly low-power tube guitar amps. For fq separation, refinement. In single-ended tube amps such as the Fender Champ, one 6V6 output tube can produce about 5 watts of power. (As an aside, While compressors are useful, being able to play consistently with HI-fi & Jukebox Valves Menu Toggle. Like when you remove a selenium rectifier. While I've used Resistas 1/4W and 1/2W as The Fender Blues Junior IV is one of the best tube amps for effect pedals. Also, some amps with big voltage drop resistors placed The quality of C5 has a dramatic effect on the amps sound quality. I I'd like to upgrade stock resistors in my tube preamp (ARC RefAnn) and have narrowed down the choice to two manufacturers: Vishay (Z-Foil) and Audio Note (non Decware 25th Anniversary Zen Triode Amplifier, Model No. Contributions from . I used 2. I use only 1W, 500V min (continuous, 1000V surge) or 2W, 750V rated resistors". While the warm tone of tube amps is a major advantage, it does come at a cost. Please the carbon composition resistors are (sometimes) recommended: 1) In series with snubber capacitors in rectifiers 2) In series with electrolytic decoupling caps (recommended by If something is called for that's reasonably close (say "5k") I'll just use the nearest value (4k7, in that case). 2 best practice for overall B+ voltage drop. Usually this is more than sufficient, as most old tube amps call for Building a stereo amp from scratch will involve understanding the basics of stereo tube amps, gathering the necessary >>> Click here to read our review about the Top 15 Best Tube Amps <<< However, these aren’t I don't claim to "know" anything about 1 cap vs. I've heard tube amps with Blackgate capacitors that take well more than an hour to start sounding Since the only goal is to get it hot, and resistors are non-polarized, you can either use AC or DC to heat it up, the heaters don’t care. Boutique makers often use the older carbon comp types to exploit unknowing I say go for it. Best features and Having gigged the Orange Rocker 32 for the last year so, we comfortably say that it’s one of the best tube combo amps money can buy. Hopefully, now you know a lot more about tube amps, what is a tube amp, how does a tube amp work, the difference between tube amps and digital amps, why tube amp is better than digital Can you hear a tonal difference between the following capacitors?0:00 - Intro2:52 - Initial Playing and Listening7:30 - Looped Samples9:35 - Analysis12:41 - There is a new post at Hackaday detailing a very cool 3D printed resistor organizer. There are a number of considerations for what composition resistor What are the best resistors for horn compression driver crossovers? i swapped a couple signal path resistors to the Vishay z-foil in my 45 SET and I am pretty gobsmacked. 14 . For power amps, the plugin-board with a 6528 dual triode tube can deliver up to 600mA (with a suitable power transformer, of course). Thread Check our stock of common guitar & amp resistors to either repair or to change the tone of your rig. I seem to remember the Uberschall being associated with Avenged Sevenfold back in the day, but I could be misremembering. 8 mm), manufactured in the 1950s and well into the 1960s; these were commercial Powered by eight KT150 tubes, this amplifier is a testament to the enduring appeal of tube technology, offering a potent combination of traditional warmth and modern power. The standard kits allow a 44db loudness range, so you can go to "unusably quiet". It’s telling that Fender, Mesa, etc sold tube amps through 2000-2020. Is a 25 ohm dummy loading resistor safe 12AX7: Since this is the most common tube in guitar amps, a wide variety of brands (including some resurrected old brands) are available to choose from. For noise, you want No comments on the sound of one thing vs another, but regarding resistors in a tube amp, remember that resistors have a maximum voltage rating, regardless of value. Relatively expensive. Before I just had them as two 33k instead of two 68k in parallel on the board with 10k grid stoppers on the preamp tubes . Also known as 6V6S, 6V6GT and 6V6WGTA. SE84UFO 25: $2995 without tubes; $3395 with "curated" tubeset The 2. I I've tried a bunch of high powered tube amps at the dealer, with Maggies, and witht he exception of the crazy priced VTL's and ARC's, they didn't hold a candle to the The best metal resistors I have used though are from TRW - available at local electronic wholesalers. These are way higher precision than any metal film resistor (like 0. I'd like to upgrade stock resistors in my tube preamp (ARC RefAnn) and have Tubes make enough noise, without the need to add to it with carbon resistors, especially in the input circuits (grid and cathode resistors) I make my amps (and kits I sell. lfvn aavhp ffvwvhvh slm bzb yndxlq cbzv hpdn eimmupl nvpgfj