Shuguang 572b tubes pdf

Shuguang has produced eighty percent of 300b tubes ever made. Up for sale will be one matched pair 2pcs of shuguang treasure vacuum tubes 300bz substitution of 300bc,300bs,300bt, packed in environmental protection box as picture shown, product of shuguang electron group. Dx engineering 572b power tubes dxe572b free shipping. Shuguang beijing vacuum tube datasheet analog metric limited free download as pdf file. Svetlana technical data 572b franks electron tube data. Does that mean my nos shuguang 811as from a few years ago will be worth. This is a triode output tube which can be compared to a 300b when it. This single change would be a major improvement in rf performance of the 572b and 811a vacuum tube. Click here to download pdf document click here to view data sheet. China shuguang tube, china shuguang tube manufacturers and. At the end of the article i mentioned that shuguang was working on a metalplate 845 tube, and that they expected to release it in september 2004. Up for sale will be one matched pair 2pcs of shuguang treasure vacuum tubes cv181z substitution of cv181 cv181t 6sn7, packed in environmental protection box as picture shown, product of shuguang electron group.

Dx engineering introduces new 572b tubes for power amplifiers. Also the curves for the rf parts 572b chinese tubes would be interesting to see as well. Rochlin, enjoy the is the leading authority in highend audiophile music and audio equipment. I want to upgrade the 300b tubes on my wavac ec300b amp. Frankly, with the psvane 845t having been disappointing, there isnt a lot of incentive to bother with the more prosaic 845hifi when the b tube is so reliable, cheap and good. June 2009 shuguang vacuum tube manufacturing facility article by rachel of grant fidelity shuguang was originally established on december 26, 1965. Will shuguang 572bs be substitutes for 572bt160l in fl. It is dedicated to be used in audio frequency range which requires the output power 100w. The shuguang cv181 improves on the sylvania for all midrange and vocal qualities, improves in the 4 dimensions of prat, and gains extra tinglefactor.

They make more than 30 different types of power output tubes alone, plus of course many preamplifier, rectifier and others. Other useful information would include your experience with similar products, infomation on a product that you would purchase instead of this one, and so on. Shuguang treasure 300bz vacuum tube matched pair replace. Not sure everyone is aware, but the shuguang tube factory is closed. This is a warning to stay away from shuguang 572b tubes as direct replacements for amps designed for 572bs.

Electron tubes for industry the kt88shuguang has an absolute maximum anode dissipation rating of 50w and is designed for use in the output stage of an a. If mistuned of if there is a load fault of some time that unloads the tank, or if the exciter ha. It made for an over all richer sounding tones and slightly lower noise floor. Dx engineering 572b power tubes dxe572b free shipping on. This is a warning to stay away from shuguang 572b tubes as direct replacements for amps designed for 572b s. Shuguang vacuum tube factory tour report by steven r. New listing vintage jan chy 5692 6sn7 cbs tube black plate brown basetube tested. It selfbiases off, with a completely open cathode return, at about 40 volts. Theshuguang treasure as a result of shuguangs 50year of expertise in vacuum valve design and production. The chinese sino 572b highmu power triode is manufactured by shuguang in china.

The new valve tube for those who skipped to the conclusion on the block is the shuguang treasure series cv181. Direct heating cathode, medium power consumption triode is used for class a amplification. They have proven themselves in all kinds of amateur, commercial, and military service. If the design parameters are adjusted properly, single. Stability problems and arcing problems are unrelated arcing or gassy 572b tubes. I was told that improper tuning could be the cause. Describe your experience with the 572b tubes china manu. We are adding back in kt88z, 6ca7z el34, 300bz, cv181z exact replacement of 6sn7 and the most recently 6sl7z exact replacement of 6n9p models of shuguang treasure black bottle tubes with our newly formed quality control collaboration with shuguang tube factory. Great quality 572 b for use in class ab2, class b, class c rf, and audio amplifiers. Amps replacing 811a with 572b the al811h runs about 16001800 volts hv, not 1400, which is why its not a bad idea to run the 572bs in that amp. Hard to believe nobody has compared psvane 845hifi series tubes not 845t to shuguang 845b since psvane 845hifi have been on the market for a while. Dx engineering 572b power tube dxe572b dx engineering 572b power tubes are available for allpurpose amateur radio service.

Yaesu technical bulletin for using 572b tubes in fl2100b. Due to datasheets that do not list the same conditions as western made 572b tubes, we are uncertain if the shuguang 572b has the same maximum ratings as usa made tubes. Two tubes in class ab1 give a continuous output of up to 120w. Ameritrons exclusive dynamic alc gives you high level, low distortion rf processing it.

Of the two plate curves i posted, neither one would pass the paofri test. Shuguang 572b hiend vacuum tube valve best matched pair for amplifier new. A normal tube, at least all the normal samples i have about 50 tubes of various types, self bias to about 40 volts. The original tubes sevtlana 572bmade in russia new tubes from pentalabs made in china told should be just as good as originals or better. Shuguang vacuum tube manufacturing article by rachel of. For many years, i tried to convince manufacturers of 811 and 572 tubes to use an additional grid wire to the empty pin, from the opposite support rod of the grid.

All tubes have 60 days warranty, tested and matched by shuguang electron tube factory. This is a triode output tube which can be compared to a 300b when it is combined with an output transformer. Great quality 572b for use in class ab2, class b, class c rf, and audio amplifiers. These 572bs are a modern version of the venerable vacuum tube that has been around for a long, long time. The svetlana 572b may be operated with its axis vertical and the base down, or horizontally with pins 1 and 4 in.

The svetlana 572b also features a low loss ceramic base and a bonded ceramic plate cap thermal insulator for high power rf transmitting tube capability. Shuguang beijing vacuum tube datasheet analog metric limited. Grant fidelity imports and sells generic shuguang tubes as well as their highend counterparts for amplifier use, the treasure series. Mar 21, 2018 audio lecture 28, how to insert 300b 811 572b 2a3 tubes into ux4 sockets duration. As of 2005 shuguang had developed 120 types of vacuum tubes, and manufactured over 70 million units. At the moment i am still using the stock tubes which are a pair of standard shuguang 300b98. The 572b is an indirect descendent of the 811 tube. Dx engineering 572b power tube dxe 572b dx engineering 572b power tubes are available for allpurpose amateur radio service. The yaesu person i talked to on the phone told me modern 572b s will often cause oscillation in a fl2100z so i must be caucious selecting replacement tubes. Throughout history, to speed development and reduce tooling costs, newer tubes use tooling from older tubes. Shuguang manufactures 40 percent of the worlds tubes. Room 369,xingyao,changsha city,hunan province,china,hunan province,china. The tube to the left is in my high voltage test fixture. These are the same as the gold class range in performance, but the glass or the top grid cap is slightly off centre during manufacturing.

I have changed the ending of this overview regarding current delivery status. Matched pair 572b valve tubes made by shuguang china. Matched pair 572b new valve tubes made by shuguang china. In normal operation the anode voltage swings between twice high voltage supply to a few hundred volts positive. The 812 was a moderately low mu tube, primarily intended for grid driven modulator service. Gave them a careful inspection under high magnification for bentdistorted elements, and then checked them for shorts. China grand tour 2009 shuguang vacuum tube factory report by steven r. Quite a few resellers will simply highgrade the shuguangs, put their label on them, and call them something else tad, ruby, groove tubes, so you think youre getting something different for the extra money but its really the same tube that just tests out better in a particular batch. New listing 2x matched pair shuguang 300b98 vacuum tube replace 300b 300bc 300bs 300bt new. The kt88 is also suitable for use as a series tube in a stabilised power supply. I did read the manul and got input from where i got the amp. Emission labs 300b vs shuguang black treasure audiogon. Its interesting to me that the old rca 811 as shown has a much higher pervience cathode than did the svetlana 572b. Ordered 4 shuguang 572b tubes from ebaychina to back up the tubes in my mfjameritron al572 amp, as i had a bad one in the amp from the factory another story.

This is a brand new, matched pair of shuguang 572b tubes. Taylor is the preferred choice for fl2100, sb200sb201, 10160l, 30l1, etc. There are 375 shuguang tube suppliers, mainly located in asia. Highmu power triode for use in class ab2, class b, class c rf, and audio amplifiers. A wide variety of shuguang tube options are available to you, such as 2 2. Matched pair tested by factory shuguang 572b vacuum tube for. You can also choose from professional amplifier, home amplifier. The psvane reference t series of tubes was created to offer an equally highend line that included common small signal tubesthe 12ax7, 12au7, and 12at7. Popular in many brands of amateur radio linear amplifiers, these 572b tubes are a modernmanufacturing version of the vacuum tube that has been around for a long time. Electron tubes for industry the kt88 shuguang has an absolute maximum anode dissipation rating of 50w and is designed for use in the output stage of an a. Rochlin welcome to perhaps the largest vacuum tube factory in the world. Get the best deals on 572b tubes when you shop the largest online.

Well im back in the same place as before low output. Describe your experience with the 572b t160l shuguang and tell us why you give it the rating you did required. Ameritron al572 linear amplifier 0 watts amp 4 x 572b tubes near legal limit. There is a seller on ebay that sells a bunch of shuguang tubes, and they have pairs of these el84s, has anyone had any experience with them. It was the end of the 1980s that cetron ceased production of their 572b.

I did try out a shuguang trasure tube some time back. I own a heathkit sb200 and decided to try a matched pair. The top supplying country or region is china, which supply 100% of shuguang tube respectively. Base indexed and internal structure aligned and supported for both horizontal and vertical operation. This particular tube is unstable on higher hf bands even with a 47k filament ct leak resistance. After ordering direct from hong kong from that jccsomething fella on ebay, they arrived at my home well packed and timely. Dx engineering 572b power tubes are the best choice for use in all types of rf power amplifiers and in all installation attitudes. Now, dx engineering is a source for the popular 572b model power tube, which means operators can finally repair or upgrade their 572b linear amplifiers and put them back into service. Taylor tubes is the preferred choice for fl2100, sb200sb201, 10160l, 30l1, etc. Base indexed and internal structure aligned and supported for. Svetlana 572b has 170 of the amplification factor and they announce it is substitutable to t160z i made a mod and had its load capacitance increased by 10% to prevent it. Dx engineering introduces new 572b tubes for power. The original tubes sevtlana 572b made in russia new tubes from pentalabs made in china told should be just as good as originals or better. Preamp tubes are really a matter of personal taste, though.