General speakers tubes vinyl digital video asylum cables tweaksdiy music films. I put the power switch on the right side because im righthanded. Threads started on or before 32301 are archived here. Ii or they can use tubes in the input and transistors in the output, as ypsilon electronics demetris baklavas prefers. The sovtek 6c45 triode assumes both driver and power tube responsibilities. Im getting full power bandwidth to 25 hz using an inexpensive opt. Woo audio wa33 fully balanced headphone and pre amplifier. The next time you need to retube your guitar, bass, or hifi amp, be sure to insist on getting authentic electroharmonix tubes. Solid power and strong bass drive even with hard to drive headphones. Charlie haden pat metheny beyond the missouri sky 180 gram vinyl lp firsttime 180gram vinyl out of print. Before listening to the fireflies, do this power the amp up, turn off the. Highquality russian 6p3se 6p3ce output beam tetrode. Threads started on or before 33101 are archived here.
This document is intended to address the frequently asked questions reguarding the blue glow frequently seen in power electron tubes or valves. A pair of 6c45 triode tubes acts as both driver and power in a singleended classa design with transformer coupled outputs. Whether youre shopping for a new amp or trying to coax different tones from one youve got, this comprehensive look at power tubes and their sonic traits is essential reading. There are no semiconductors used in the entire signal path. I have a nice blue glow on the glass of one power tube and a bright orange on the other power tube. As you use your tube amp, tubes wear out due to the heat it generates. I forgot to add that output pentode must have well regulated screen grid supply. Our aim is to offer what we believe to be the most musical and sonically refined audio systems available in new zealand. The entries are in alphabetical order by magazine name and then in chronological sequence. Jul 29, 2002 this is what i found about the 6c45 used in my r10h. This is a list of vacuum tubes or thermionic valves, and lowpressure gasfilled tubes. Woo audio wa7 gen 2 fireflies tube headphone amp wdac. The transistor bdx 34 c, darlington must have a small heatsink.
Detailed entries for one subject from the index to how to do it information. Larry no longer messes with tube amps, but kindly gave me permission to reproduce and maintain the faq. The kwr37 link was to show that tubes were also used as complex digital switching components in equipment well past their prime when there was a special requirement. The 50 watts i described above does include transformer losses etc, so from a practical viewpoint you are probably comparing a 30 watt a1 to a 50 watt a2 amplifier. They found what an amp made with tubes could do soundwise if you did unusual things with it. The 6ax7 12ax7 tube makes it easy to drive the amp to its full power. When power tubes wear out, the low end starts to fade, and your amp will sound flat. The input noise resistance is 100 ohms, very low inputoutput capacitance and the dissipation are nearly 8 watts which sovtek claims makes it an ideal candidate for preamp, driver and signal processing applications. Slightly more power may be available with a lower impedance opt, but this usually sacrifices the sound quality. Each wound string is precision wrapped with round nickelplated steel onto a high carbon, hexagonshaped steel core. How to know when a tube fails in your amplifier a tube. Most importantly, its also very linear with only 3 prominent features.
The 12b4as will deliver about twice the output power 1. Basically, the 6c45 is a high mu single triode with a low plate resistance and a very high transconductance. Nominal output power is 5 watts with a harmonic distortion of power transmitting dht. Interestingly, in the 1626 data sheet, it states that these tubes are not suitable for purposes other than rf oscillators or class c rf amplifiers. The rearpanel has goldplated stereo rca input jacks. The 6c45 pe is a low power triode 8 watts max for the p d paramenter. How to build the seth pp2a3 electrical connector rectifier. Woo audio, a new york based audio product company specializing in headphone products, has just revealed a prototype of their latest product, at the rocky mountain audio fest 2012. The large diode must survive a current of at least 3 a on average. Woo audio wa7 fireflies headphone amplifier equipment. The glow of the tubes is usually enough to let you know that the amp is on, but i really like. The unique voltage amplifier stage drives without problems the 211s grid pemitting also a soft a2class mode of operation.
These are the biggest tubes in an amp that pump out serious wattage. The plain strings are made from the same high carbon steel as the hex cores. I have been in lockdown mode for the past few weeks. Nov 30, 2012 the tubes only get moderately warm in the panam i could still touch them after it had been on an hour with the gateway.
I use particularly vr tubes that glow nice and are more temperature stable than zener diodes. When the tubes are driven hard, the plate voltage falls significantly, but the screen doesnt, so it can. Audio asylum questions about tubes and gear that glows. Ever been bothered about power tube failure in your amp. The 6c45 is a small family of tube that doesnt offer a lot of variety. Beauty meets highperformance, wa7 is a vacuum tube headphone amplifier. Threads started on or before 42101 are archived here. A guide to power tubes and their signature sounds premier guitar.
That being said, the panams stock tubes, while they sound good out of the box, have some shortcomings. This new product is named the wa7 and is both a usb dac and tube headphone amp. More electron tubes can be found in the tube store collection of new old stock nos. These are great replacement power tubes for many guitar amps. The new 6c45 sovtek tube the best discover ive recently made is the new 6c45 tube. The function can be tested with a car lamp 12 v, 50 w as glow plug.
To drive the 6c45 tubes to clipping you need 4 volts of swing, so i recommend using the 600. Guys, i have make lots of glow plug igniter from cheap one with just 2 diode connected in series with your starter motor use the voltage drop on 2 diode to power the igniterto multiple resistor connected in series using a alligator clip to adjust currentto 3 terminal leniar 5 terminal switching regulatorto dc to dc. To use the 6c45 it is necessary limit the power supply voltage of the driver reducing the relative secondary of the transformer because this tube have a max anode voltage of 150v. Problems can be solved much more easily when civility is kept intact. Woo audio wa7 usb dac headphone amp novo audio and. It sounds really good, but there is just not quite enough power for my 87db speakers. Project cntry main page description parts tubes type subtype. You can substitute any 60806as7g family of output tubes, and any 6sn7 variant driver tube. Dan demoed his latest and greatest preamp, the ls 36. You can also learn more about vacuum tubes and tube amplifiers. Power pilates workout extreme music tv 04f47238534b46debe9fe4ad58b73256 fitness perfect inc blue lagoon casablanca project 04fb4389587442c6a31a800ab84f4ea7 karma ambient vuliminyango 04fb8495d73a4dc69cf5deab86170624 i believe feat. The ebay link i found in other threads must be expired.
Frankly, we like tubes because music was made with them, the sounds we like were developed by people using tube type amps. The attendant usb driver can be downloaded from woo audios site. Designers of hybrid amplifiers can use solidstate devices in an amps input stage and tubes in its driver and output stages, as music references roger modjeski did in his rm200 mk. It uses two 6c45 driver tubes, and two of the previouslymentioned.
Wa33 fullybalanced headphone amppreamplifier woo audio. The ic ne 555 is a timer circuit, here used as switching oscillator. One easy upgrade to this power supply would be to replace r10 with a chassis mounted inductor. One of the power tubes has a strange stain in the top of the glass and some rust in the. If solid state stuff had been made first, and tubes second, we would probably have a different palette of sounds now.
This is more accelerated on output power tubes like 6l6. Those amps you see with the glowing glass lightbulbs sticking out of them. Perhaps one of the most eyecatching features of this combination ampdac is the solid block of glass that sits atop both boxes that allows the tubes to remain delightfully visible while providing a protective shell of sorts against random collisions for the tubes. An alternative method is to insert a cathode bias resistor between the cathode and ground, and connect the grid to ground via a gridleak resistor. Rms and power we mentioned power earlier, when we investigated the flow of current through a lightbulb using a 240 v battery. This was the way led zeppelin was supposed to sound, larger than life, powered by the glow of a mcintosh mc275 power. This is a bit tougher with power tubes these days, as vintage el34s can be difficult to find, and expensive when you do find them. There are no semiconductors used in the entire amplification path. The amplifier ships with the original 6n8p 6n5pj tubes, and also a set of russian made svetlana 6hc 6n8s tubes. Perfect for the output valves used in the reissue marshall jtm45 head and bluesbreaker combo amplifiers. This driver stage use a cathode bias so it is necessary a very good audio capacitor in parallel to the cathode resistor 100ohm. Theyre vacuum tubes, and theyre behind the amplification of the audio. Glow plugs free delivery possible on eligible purchases.
It sounds infinitely better than my computer speakers, and works great no exploding caps thank god i did notice that one of the 7591s was cherry plating however bright orange anode so i turned off power and swapped the two tubes, the same socket continued to be the problem. Jan 15, 2009 although some people refer to them as power tubes, i feel output is far more fitting. Wooaudio wa7 2nd gen fireflies desktop headphones tube amplifier your rating. I guess they forgot to tell the tubes about that, they sound quite nice in a low powered set like the darling.
Very high transconductance, incredible linearity, very low noise and low plate resistance. Or how i discovered that things are never as simple as planned, especially when writing such a howto thing by jeanfrancois lessard ing. Installation is pretty clear, just make sure the guide key is lined up correctly and do make sure your amp is turned off for a day or so before changing tubes as the capacitors can hold a high charge and fry you if you are not careful. This is frequently done on power stages, but could cause noise and stability problems with smallsignal stages.
Threads started on or before 41401 are archived here. The new 7 bass driver, designed specifically for the twenty. I recently had a blackface fender bassman amp restored and was wondering about which 6l6 tube would give me the best tone. From the 1st moment i saw the specs ive recognized this will. For late 2004 through 2007 model years, it is in the vicinity of the icp sensor. If you arent sure about which valve you need, or what tubes you can substitute, let us help you. Let me just say that i want to protect my nos tubes as much as possible. With the aeon flow open, i get more shine and clarity by setting the. The power transformer in this photo is an antek 1t200. Finding triode curves for the 465a valve has been a challenging task.
Phils old radios now here is a construction approach that anyone can follow. In the 1960s sylvania printed the following article. The kwi 200 will be our first integrated amp and adds a greater level of functionality, control and enhanced user interface with digital displays and minimal controls. They come in many different windings for matching various impedances. For that added power, you end up with a 3 stage vs 2 stage driver and more complex power supply requirements.
The glow plug driver can easily be built on a normal laboration card. The 6c45 triode acts as both driver and power tube. It also affects the overall gain of the power amp, and the frequency compensation provided by components within the feedback loop one or more caps or resistors to help keep the power amp stable. Using the passport as the power supply instead they were yet less warm, suggesting they are drawing less power. Sheet3 sheet2 sheet1 w701297s300 w700s300 w7049s303 w7057s437 w7060s438 w7079s300 w701409s306 w701420s300 w701424s300 w701426s300 w701430s300. Threads started on or before 40701 are archived here. There are some available from a spice simulation which i couldnt get hold of the model, so when i finished the curve tracer, it was the right time to take on this challenge. There are separate front panel volume controls for the left and right channels, a front 14inch headphone jack, power switch, and a window to monitor the glow of the vacuum tube filament. This may occur because of errors on application lists, midyear production changes, changes to the vehicle since it was built, the fact that a car was not built for the us market, etc. Mar 25, 2016 the sovtek 6c45 triode assumes both driver and power tube responsibilities.
It is a pure tube design, utilizing 6c45 tubes in a classa, singleended topology, with transformer coupled outputs. Parmenter sound is based at muriwai beach one of the most ruggedly picturesque wilderness beaches in new zealand. Although the electronic values of both of the tubes are almost identical, they hardly sound the same. Wa33 employs a true fullybalanced design featuring 6c45 driver tubes, four 2a3 power tubes, and 274b rectifier tube, all in directheated triodes to reveal the. Audio amplifier entries in index to how to do it information. Jan 21, 2009 had 3 bad glow plugs, wait to start light only stays on for 1 sec. It is a fully balanced, tubebased unit comprising two chassis that are. Mains electricity is ac and has recently been respecified in the uk to be 230 vac 10% 6% at 50 hz 1 hz, but how do we define the 230 v. There are some for sale on ebay from the early sixties and seventies. Elago skinny hang case for apple airpods night glow blue. Blue glow in tubes faq this document is intended to address the frequently asked questions reguarding the blue glow frequently seen in power electron tubes or valves.
Woo audio wa7 fireflies headampdac glowingly musical. For a1 operation, it looks like 30 to 35 watts into 10k is about the limit. What i did was pull my purple wire from the fender mount power relay, put a wire from the positive terminal of the. Carcare vehicleengine search vehicleengine search makemodel search. Our new ehx strings electroharmonix electric guitar strings are customdesigned to our specifications and made in the usa by a premiere string manufacturer. Did you know that electroharmonix makes many of the worlds greatest vacuum tubes. This driver is designed to produce an extremely natural and wide dispersion characteristic while integrating seamlessly with its other drivers. The woo audio wa7 fireflies ampdac is a combination of high performance vacuum tube headphone amplifier with a builtin usb digitaltoanalog converter. Everything you ever wanted to know about output tubes. Click on a see also sa or tracing xx to view detailed entries about a related subject. The da converter is designed to be capable of up to 24bit384k sampling rates. My team respects my shut door and knows that i am deep in the design process. Shipping cost is 55 to uk, 72 rest of europe as its a surprisingly heavy unit at kg all wrapped up. Audio asylum search of tubes asylum enter your search criteria.
More electron tubes can be found in the tube store collection of new old stock nos if you are looking for a tube shop carrying the very best tubes for your amplifier, youve come to the right place. Jan 10, 2014 the tubes are open ended into the vacuum chamber and they also sometimes have blue glow at e6 torr vacuum or better on new and very clean tubes. Plate current 40 ma plate voltage 150 volts grid voltage 9 volts transconductance 45,000 umho 45 mav mu factor 52 interelectrode capacitance input 11 pf output 1. Replacing with fresh power tubes on a regular interval is a good, easy way to keep your amp and tone in top shape. Wa7 fireflies 2nd gen headphone amplifier dac woo audio. Bob danielak bobs dcdarling has to be one of the best sounding micro amps ever roscoe primrose.
Plate voltage 150 heatercathode voltage 100 cathode. Ze glow modulator tube, a linear light source for rotatingdrum fax receivers, film soundtrack recording, etc. Power tubes or more accurately termed output tubes are what provide the big sound. This was also seen in tubes from the golden age of vacuum tube production. Woo audios fireflies is a tube headphone amplifier with a builtin 24bit384khz dac. Red plating vacuum tubes help steve hoffman music forums. Pae great information about russian high mu tubes 6c45, 6h30 etc including a single tube amp, and 211 circuit steve benchs page a must visit page of tube audio design. The sound and power level reminds me of a trioded 6v6. Wa7d fireflies retains the same highperformance ti pcm5102a dac chip and amplifier section as the wa7.