Instruction manual general description the hygain 18avqii is an omnidirectional, vertical radiator that operates on the 10, 15, 20, 40, and 80 meter amateur bands. Nobody liked to buy this tube because the cooler was a little bit deformed. I made a double bottom sheet, so the cables can be under the bottom. The tube and a very special high voltage, high current band switch, as well as a 4kva mains transformer, distinguishes the dx2sp model from the dx2 unit. The gs35bgs35b tubes is used for wideband power amplification at frequencies up to mhz in rf equipment.
Some russian data sheets show the gs35b anode cooling requirement to be 2500. After finished with the last step, the amplifier should be put into a. Gain coefficient of 1 st grid in relative to 2 nd grid. Prior to sale we run each one up heaters only on a test rig with full cooling applied for a few hours. You can make your own radial system following the manual, or use the. In fact the tube was fine and it was actually a russian ceramic door knob capacitor breaking down, this failure was a result of the anode rfc being too small in the first place.
Tubes for ham radio use hfvhfuhf,linear amplifier builders. The lcd display and its control push buttons provide. Provided to youtube by cdbaby g35 ygtut isaiah rashad g35. Practical valve linear amplifier construction vk3hz. Rog swift pg27uq gaming monitor 27 4k uhd 3840 x 2160, overclockable 144hz, gsync hdr, quantumdot, ips, aura sync. The gu17 beampower double tetrode is used for generation of power amplification at frequencies up to 250mhz in rf equipment. There was an interesting article on website by ex8a describing contesting amplifier.
Click on the picture to see the details of the construction. G a m m a l u x gbeam series gb35b2 lighting systems. The tube is a great replacement for the 8877 and at a much better price. The so called specification sheet for the gs35b was provided for the tubes as they were produced in the union factory for. When you find it, write your name and date in the logbook.
Tube filament step start circuit limits cold inrush current. The system will work against earth ground or a resonant radial system when mounted above ground. Gs35b gs35b russian triode tube,socket and teflon chimney. To put item to basket click on the basket picture or price. Rog tytan g30ab rog republic of gamers asus singapore. Offered tubes soviet marks as gu74b are made in the ussr at 198092 on this svetlana factory, are full analogue and have the best parameters rather modern sv.
Rca homeentertainment and industrial receivingtype tubes and on picture tubes. W4zt socket this is my gs35b tube socket or mounting fixture design. Gu81m tubes two nice pieces were added to my collection of tubes. Lcd also has a backlight so that the operator can clearly read information day or night. The case will be a 19 inch 6 inch high server case. View online or download ge az55h15dabm1 and owners manual and installation instructions. If you take something from the container, leave something in exchange. Past performance is not necessarily a guide to future performance.
Df6na datasheets gu35b similar to qbl 53500 or qy53500 metalglass transmitting power tetrode at frequencies up to 250 mhz. Svetlana power transmitting tetrode the svetlana 4cx800a is manufactured in the svetlana electron devices sed factory in st. A typical russian gs35b will run about 25 to 30 percent of the plate current value for a grid current. Be sure to take care of any problem you find, or have your servicing dealer correct it. I like to show you here the steps from this project. So when you get the valve it can be put into immediate use with full voltages. Use a gpsenabled device to navigate to the provided coordinates, which will then lead you to one or more locations. Gs35b also gs7b metalceramic transmitting power triode at frequencies up to mhz. The plate dissipation of 1,500 watts was a minimal conservative rating for this tube in service above 800 mhz. Gccd series microchannel seer air conditioner r22 style b hvac service parts supersedes. The gu32 32 beampower double tetrode is used as an oscillator and rf power amplifier operating in the metric wavelength range in rf equipment.
Fuel return tube clear plastic tube priming bulb engine switch on on closed open 4 for your safety, and to maximize the service life of your equipment, it is very important to take a few moments before you operate the engine to check its condition. This is the first sign of trouble and often splatter is a result of over driving small amplifiers. In march 20 i start to build a big linear with linear with the russian gs35b triode tube. Offered tubes soviet marks as gu74b are made in the ussr at 198092 on this svetlana factory, are full analogue and have the best parameters rather modern svetlana 4cx800a. Omanualcontemadvertenciase instrucoesdesegurancaimportantes. If your line voltage drops enough to cause your filament voltage to go below this level, you should adjust the filament voltage so that it will stay at or slightly above 12. Svetlana tubes also russian made capacitors,vacuum relay,coaxial relay, parts for ham radio,linear amplifier builders. I get a roller inductorturn counter set from w4imd. The idle current at 1800 vdc should be around 250 ma with zero bias.
An unused new old stock nos gs35b transmitting tube. The gs35b and gs31b tubes are designed to run much higher grid currents than american tubes of the 8877 variety. Characteristics intermodulation distortion of the 3rd order minus 32 db anode dissipation 2. Gu84b gu84b as well as for power amplification at frequencies up to 250 mhz with output power up to 2. Tube tester and filament burn in jigheres my answer to cooking the tubes for days and then testing them before inserting them in an amp. Under the dirt was a brand new tube i collect the parts for this linear over one year on fleemarkets. Information is from data books and from the following. The gu84b gu84b svetlana power tube is a ceramicmetal forcedair cooled tetrode intended for use in power amplifiers with distributed amplification and for ssbsignal amplification with output power up to 2.
Aug 11, 2016 provided to youtube by cdbaby g35 ygtut isaiah rashad g35. The tube needs to be run under these conditions for 4 or 5 hours, with full forced air coolingto remove the heat. To get data for a tube wich code starts with a particular character, put a space on the begining of your search. I cut a 3 inch square hole in the bottom to allow air flow from the blower. Note i have learned an important lesson with this jig. Theese are a russian soviet pentodes gu81m with the anode dissipation of 450w 600w max 3 minutes. The factory was manufacturing the tube in such a manner as to guarantee their performance under the specified conditions. The new rfc has 10x more reactance and the new bypas c is fine. How to download and install spider man friend of foe for free on pc 100%works 2016 duration. The gs35b tube socket is made from 316 aluminum plate. The socket to the right has my teflon chimney in place. The tube needs to be run under these conditions for 4 or 5 hours, with full forced. Information is from data books and from the following resources.
Instruction manual general description theory of operation the hygain 14avqwbs is an omnidirectional, selfsupporting, vertical radiator that operates in the 10, 15, 20, and 40 meter amateur bands. The gu78b tetrode is used for power amplification in distributed amplifiers and singlesideband signal amplifiers at frequencies up to 250 mhz, in rf. My newest selfmade linear with one gs35b dc2wk blog. Caution should also be exercised when operating the tube with filament voltages that may go below the nominal 12. G a m m a l u x gbeam series gb35b2 lighting systems click. Qro home made linear amplifier gateway i5uxj2 rosati. The performance data shown in tables and graphs on this page is calculated in usd of the fundindexaverage as applicable, on a bid to bid nav to nav basis, with gross dividends reinvested on exdividend date. Many people have used old commerical tubes where the tubes are taken out of service as there performance has dropped below spec. Application field, power amplificationr up to 250mhz in special equipment. Gs35b nide good cooling if you put good external air blower fan the tube will work for years. The so called specification sheet for the gs31bgs35b was provided for the tubes as. Informacoessobreestemanual estemanualedestinadoaousuariodomgegalaxyserie3500.
All tubes new, military equipment and have otk mark. Note this is for the valve only without the copper anode cooler. Some russian data sheets show the gs35b anode cooling requirement to be 2500 litersminute. Amplificatori lineari i 5 u x j qro home made linear amplifier hf amplifier. Df6na datasheets gs35b also gs7b metalceramic transmitting power triode at frequencies up to mhz. Not available in english but if any question, you can mail me.
I make and sell sockets, ptfe chimneys and bias boards. For all languages asking for the gu43b hf amp design. It virtually eliminates the stray inductance in the grid circuit. Data taken from informative russian tube web site of paul goble, nd2x5. Commonly published data shows 1500 litersmin as 90 cfm but that conversion is wrong. The removable bolt on copper cooler heat sink is a great idea and makes spare tubes very reasonable. After using and breaking in the amp for a month now, the efficiency has improved with age. The filament alone heats the entire bottom of this tube and even with the fan blowing air into the box, the bottom of the tube will get too hot to hold in your hand. The only thing is the higher than necessary filament consumption. The tube can be cooked by, bypassing biasing voltages, and running the tube at 1800 vdc. After pressing any button the backlight will automatically turn off after a preset time. Use of this tube in the spectrum occupied by the amateur bands 160 meters through 70 centimeters was never.
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