Then begin the mechanical difficulties it is indeed the greatest difficulty hf amps are the mechanical strength because of the student temperature, ventilation, vibration we must not forget that there are equal filaments vibration breaks i start with the greatest courage as you know mounts the simplest triodes are a cause of mounting since the first mechanical support lamp is simply a hole. Those tubes needs about 3335v as a bias voltage in my case to produce about 100110ma bias current 50ma per tube. Since this particular amp was worked on, many lessons have been learned. Find gi7b amplifier related suppliers, manufacturers, products and specifications on globalspec a trusted source of gi7b amplifier information.
The 0640 is a dual tetrode tube with the 2 screens internally connected. A practical guide to database design 2, hogan, rex, ebook. Another spot to look, which is especially useful if youre looking for replacement types and tubes with similar bases or characteristics, is the nj7p tube database. The jj electronic 6l6gc is the classic pentode built with the rugged construction that only jj could deliver. Gi46b russian new tube power amplifier qro hf vhf uhf gi46b. This link is listed in our web site directory since thursday apr 29 2010, and till today hf power amplifier using gi7b has been followed for a total of 3854 times. Rca homeentertainment and industrial receivingtype tubes and on picture tubes. The cylinders are from rainwater down pipe and split for easy removalfitting. The 2m amplifier with the pair of gi7bs is now 10 years old and has been on loan to kevin g1kaw since i. The diagram below is the method i recommend for using the bias board. This 6v6 has the standard rugged construction weve come to expect from jj which. A 12v fan is mounted underneath blowing upwards and cylinders surround tube anodes to contain airflow. Dentron clipperton l conversion to gi7b tubes and other.
As of today we have 110,518,197 ebooks for you to download for free. I make and sell sockets, ptfe chimneys and bias boards. With its 350 watts plate dissipation this tube is a good choice for producing medium power 300 to 500 watts. The output coupler is pi network with a plate cap 560pf an inductor of 1uh and a load cap 10600pf. Lots of testing on everything from the gi7b to the gs35b were conducted. The gi7b gi7b microwave triode operates as an oscillator and an amplifier in continuouswave or pulsed mode with anode modulation in the centimetric and decimetric wavelength ranges. Pa with two russian tubes gi7b does linear amplification cw and ssb. The gi7bt is a very rugged metal ceramic tube built during the cold war for use on russian tanks. Click here for my 50mhz gs35b commercial amplifier and associated problems. We specialize in newoldstock tubes and offer high quality tubes, sockets, capacitors, and other parts. Known for their reliability and articulation, the jj 6l6gc is a great option guitar amplifiers and hifi stereo. Gi46b gi46b russian tubes, ham amateur radio amplifier tubes. Gi7bt russian new tube power amplifier qro hf vhf uhf gi7b gi7bt. The complete book is available, in sections, in pdf format from the following address click on the library link on the left that will give you the documents.
Click on the link to care and feeding on the left margin of their page. Hand dryer brushless blower as forced cooling for linear power amplifier with gi7b. I purchased a clipperton qro amplifier that was a basket case. Gi7bt tube is same gi7b tube, but have a strong body and a best vacuum. You reach this tube or valve page from a search after. Vacuum tubes radio tubes 5,000 different tubes in stock. The gi7b is available in two variants differing in the type of cooling. Describe your experience with the russian gi7b and tell us why you give it the rating you did required. Pdf cameron hydraulic data a handy reference on the. About hf power amplifier using gi7b the resource is currently listed in in a single category. In electronics, a vacuum tube, electron tube in north america, tube, or thermionic valve or valve in british english is a device controlling electric current through a vacuum in a sealed container. This tubes has the best design, the best manufacture and quality control. I have a homemade amplifier with 2 gi7b for hf and i have about 800900 watt in my bird 43 wattmeter. Gi7b russian new tube power amplifier qro hf vhf uhf gi7b.
Stc navigator transmitting pulse tubes tube gi7bgi70b. I am writing to give information about a very special russianmade transmitting valve, named gi7b sounds like some special event station from northern ireland. I start homebrewing an hf amplifier based in a gi7b tube, using a grounded grid configuration. Most of the datasheets are in pdf format and some are links to other html pages. Throughout history, to speed development and reduce tooling costs, newer tubes use tooling from older tubes. Because there was no need for space limitingi could use a suitable transformer who could easily deliver the 2,2 kv at 1 amps for an output of 1 kw. The 812 was a moderately low mu tube, primarily intended for grid driven modulator service. This link is listed in our web site directory since thursday mar 4 2010, and till today gi7b gi7bt tubes has been followed for a total of 1576 times. A practical guide to database design kindle edition by hogan, rex. These sockets are professionally crafted by k4poz and w4zt to provide you the best socket for your retrofit or new construction project. There are links to many amp projects by other hams around the world. The gi7bt is a more ruggedized version of the same tube featuring a fatter ceramic element but otherwise the same as the thinner gi7b. About gi7b gi7bt tubes the resource is currently listed in in a single category.
The simplest vacuum tube, the diode, contains only two elements. Discussion in general technical questions and answers started by ae1pt, aug 22. I am working on posting the rca hb3 tube handbook on line on this. Power supply requirements for the vk3nx 50 mhz amplifier.
This was an early effort at retrofitting the sb230 amplifier. We carry over 5,000 radio and vacuum tubes in stock every day and we ship world wide. Herein you will find a collection of vintage engineering texts, vacuum tube datasheets, and other obsolete information, presented free of charge and without annoying advertisements. Then came the idea to make a portable linier amplifier, witch we could use to our trip to svalbard. If you do not understand highvoltage safety procedures do not attempt to build a tube amplifier. Dentron clipperton l conversion to gi7b tubes and other modifications pat griffin aa4pg walking out of dayton, 2014 my eye caught a beat up clipperton cabinet under a vendor table. May 28, 2014 the gi7bt is a very rugged metal ceramic tube built during the cold war for use on russian tanks and other military vehicles. The gi7bt gi70bt triode is used for continuouswave or pulsed operation with anode modulation, as an oscillator and an amplifier. Care and feeding of power grid tubes eimacs very informative book all about power grid tubes. Gi7b lot of four 4 russian new tube power amplifier qro hf vhf uhf gi7b. Hd high efficiency plate caps for the eimac 3500z tubes. The main category is amateur linear amplifiers that is about hf amplifiers for ham radio use.
Oscillation uhf in continous mode and pulse mode with anode modulation in special equipment. Df6na datasheets gi7b similar to aeg lda also gi70b same tube no cooler, metalceramic transmitting triode up to 9 cm. A very friend of mine give me a 2 tubes gi46b and i have seen that a gi46b 2 gi7b. This list is biased by the tubes that i have encountered during the repair of the many tube amps that have come to my repair shop. I am writing to give information about a very special russianmade transmitting valve, named gi7b sounds like.
The transistor used is simply a tip36 and zener diode and 41 volts that it allows a good polarization of three tubes not finding tubes ferrites for shock filament i realize ca with a torus here is the photo i realize ten spires. Gi7b lot of two 2 russian new tube power amplifier qro hf vhf uhf gi7b. Download it once and read it on your kindle device, pc, phones or tablets. Th input uses only a 10nf coupling capacitor and is tuned by rig at. Gs35b tube sockets i build sockets and teflon chimneys for the russian gs35b.
Grounded grid amplifier using a pair of gi7b triodes by bob briggs, vk3zl, october 2006. Be sure to install the fuse in series with the bias board and the keying line. These sockets are designed for the best possible connections to the tube while allowing full air flow around the socket for more than adequate tube cooling. Tubes for industry, music, ham radio, the audiophile. Here youll find a modest collection of datasheets for some popular tubes. The socket to the right has my teflon chimney in place. In 2000 i acquired a second third or fourth hand job, originally built by hg8ug, bought in dlland from dg5nff i believe by oz1bnn last year. Sb230 retrofit using the gi7b by k4poz september october, 2006. Drive them hard and the power only comes up for a few seconds. I was forced to add one 10v zener diode in series with tl431 and. Gs35b gs35b russian triode tube,socket and teflon chimney. All these links open in a new browser window so that you can return quickly to this page without having to reload.
Gi7b russian tube power amplifier qro hf vhf uhf gi7b for. Amplifier bias boards for sale w4zt gi7b gi7b sockets. It apears to be a larger diameter and is supposed to have a larger power capability. Gi7b and an external input circuit atu to obtain swr 1 on all bands. Please refer to a data book for the pinout connections. Gi7b linear this page shown only for historical reasons, the amplifier is no longer in my possesion, but has found a new home at oz6ym.
The tubes gi6b, gi7b, gi7bt, gi70b and gi70bt are all the same gi7b ld7. A pair of gi7b tubes are wired underneath similar to fritz, pa0fri. I try to concentrate on popular andor readily available tube types. The first electronic amplification of sound was done with vacuum tubes. We do not know these differences as the 3bs2b tube data is not available. Use features like bookmarks, note taking and highlighting while reading a practical guide to database design.
The triode boardworks nicely but data about bias voltage for two parallel gi7b they are giving in a manual are wrong. Gi7b russian new tube power amplifier qro hf vhf uhf gi7b ebay. 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. The gi7bt is a very rugged metal ceramic tube built during the cold war for use on russian tanks and other military vehicles. When we are building a linear power amplifier with electronic tube s, one of the important construction detail is successful cooling. Look brand new description you are bidding on russian gi7b tubes. I have no pictures any more from the building phase, but i can show you what i have. This gi7b amplifier is based on the yu1aw design that can be found on the internet, its sometimes called the lazy builders amp. In addition to the data i have scanned and posted, if youre looking for data on a particular tube you should visit tsdl on duncanamps website, or franks tube data.
The gi7b gi7bt tube is not the best tube for linear amplification on the 1296mhz band, but because these tubes are relatively cheap and accessible, many of us tried to use them. General information, outline and fixing drawings, diagrams of electrodestoleads connection and the main data for tube. While the russian tubes are rated for pulse service they cant handle the extra current for any length of time useful in communications duty. Aug 22, 2008 gi7b vs gi46b gentlemen, i also noticed the gi46b. Gi7b gi7b hfvhfuhf power coaxial triode tube original box tubes store. The main category is rf power amplifiers that is about ham radio power amplifiers. We have added a shopping cart for easier ordering and an improved search feature. Ssb 10mw transceiver, 175khz inductive pulse receiver pdf. Does anyone knows if the old reference books on tube with the specs. I was looking for a cabinet to house a homebrew gi7b amp that i was moving from rack mount to table top. The cut off bias resistor in the amp is chosen so that the tube will be cut off when the keying relay contacts are open.
Gi7bt designed for radar aplications in the vietnam war, also for laos,cuba,africa tropics. The tube was temporary mounted on a base of a defect 3500z for eventually testing in my fri750 pa. The gi7b microwave triode operates as an oscillator and an amplifier in continuouswave or pulsed mode with anode modulation in the centimetric and decimetric wavelength ranges. However, when i looked at the datasheet the plate dis is the same as the gi7b. Click on the picture to see the details of the construction. The fan is mounted against a 18 thick soft material to reduce noise and any vibration. The 572b is an indirect descendent of the 811 tube.
Svetlana technical data 572b highmu power triode he svetlanatm 572b is a highmu power triode intended for use in class ab. The chassiss dimension will be at 360mm d x 350mm w x 200mm h cut six pieces of aluminum sheets for the front panel and partition for. W4zt socket this is my gs35b tube socket or mounting fixture design. The highs are clear and responsive with warm mids and tight solid lows. A new transmitting valve from russia the gi7b mirko voznjak, yu1ad and mike king, g3my issue 55 six news, november 1997 mirko, yu1ad writes. Reading all the horror stories about the cheap, no name chinese tubes i am skeptical of ordering them. Owner jim cross and his knowledgeable staff continue to offer the same great expertise and service. It virtually eliminates the stray inductance in the grid circuit.
Most of these datasheets are in english except where noted otherwise. Gi7b similar to aeg lda also gi70b same tube no cooler, metalceramic transmitting triode up to 9 cm. No annoying ads, no download limits, enjoy it and dont forget to bookmark and share the love. Apr 25, 2020 worlds leading amateur radio web site with news, technical articles, discussions, practice exams and more.
The triode is available in two variants differing in the type of cooling. The anodes have individual connections on the top of the glass envelope and the grids are also separate. Books about electron tubes and their applications dhtrob. There is tube data, frequently asked questions, discussion, construction ideas and details and lots of information for the amp builder. There were bags of components and hardware and a large assortment of additional items, less the four 572b tubes. This video presents a monoband 10m linear amplifier using the russian military tube gi7b in grounded grid connection.
1320 1335 1104 414 868 53 1239 444 424 632 1378 686 1398 859 750 686 438 824 911 601 506 1039 588 572 1428 947 1037 1206 599 1112 631 679 754 1457 687 825 763 489 412