4cx800
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Es gibt nur GU74B, eine 4CX800 hat es noch nie gegeben
3 A Input capacitance 51 +/- 5 pF Output capacitance 11 +/- 2 pF Feed-through 0 The first commercially made amps using the new Svetlana 4CX800 were actually using GU74's . BE AWARE THIS UNIT MUST GO MOTOR FREIGHT!!CAN EASILY COST $200 Hot Item from 49803 to 4N55/8838 , stock bid & quote from 4000+ leading distributors - M & R Communications,Circuit Board Solutions, LLC .
TenTec has even discontinued their Titan III amp that used this tube
They all perform well and I recommend any of them ใใพใซใฏ่ณชๅใใพใใใ็ฌฌไธ็ดใขใใใฅใข็ก็ทๆๅฃซใงใใใ็ไธๆฌใงkWๅบใใฆDXใ่ฟฝใใใใฆใพใใใๆต่กใใฎ10,000ใณใคใณใใฒใใใใไบบใฏๅฑ ใพใใใ JA2QRPใใใฎใในใใชใใฏใช่ณชๅใฏใฉใๆใใพใใใใใฎไปใ่ฒใ ใ่จใใใใใจใใใใฐใใใใใงใใฉใใใ JA2QRPใชใใฆๅญๅจใใชใใณใผใซใ . 4cx800 With the naming conventions of ceramic tubes, we can tell quite a bit about the unit without even looking at the data sheet Usually a matched pair is a bit more expensive because the selection has to be done manually .
C'est pourquoi, lors de ces prochains concours majeurs, je vais peut-รชtre m'inscrire en low power, car l'utilisation de l'ACOM 1000 et de sa 4CX800 (800W) me fait passer pour un tout petit ! HI
KL1WE and W6HF made their annual trek north again and joined us for several operating events, including Field Day and IARU Gu-74b Gu74b 4cx-800 4cx800 Tube Socket And Plenum - Rare And Hard To Find . Ultima Discussione: Corso di preparazione per la patente 2021 GU-74B NEW tetrode tube NOS same as 4CX800A GU74B tubes .
Most of what I didnโt like about the Grounded Grid had nothing to do with the sound of the unit, but instead the look and feel of the preamplifier
Magazine ยป Radio Kit Elettronica ยป Precedenti fascicoli 2020 2019 2018 Products Archive - Page 5 of 6 - cheap vacuum tubes prices . What was the most powerful 11 meter base that you ever heard of ??? I recall back in the early 80's there was a cb station up in michigan that was operating somewhere around 27,000 watts !!! Taken from the working Russian military transmitter used 4CX800 (Gu74B) .
Varmint XL600 Base Amplifier BEAUTIFUL! For EBAY! SOLD! 2xERF7530 Mosfet Base Amplifier On 30v Test Project For Ebay
-Le seul hic c หest que de l หOural ร HamRadio il y a un coefficient 3, et de HamRadio ร HamExpo ou Marennes il y a encore un coefficient de 2 Svetlana Tubes also Russian made capacitors,vacuum relay,coaxial relay, parts for HAM Radio,linear amplifier builders . Think you won't be fined by FCC? Try this one on for size! Before the Federal Communications Commission Washington, D The amp went back to the shop for diagnosis and repair, and returned with a new 4CX800 tube late the night before Sweeps SSB! Great service from the folks at Array Solutions .
Note: I have many images of the build in progress- It will take some time for me to get this page into shape= I had been looking for a rugged HF linear amplifier with plenty of headroom
g the Alpha 91B and the Acom 1000, use GU74 / 4CX800a tubes Dentron MLA-2500 Amplifier Amp 4cx800 Conversion $375 C MY OTHER HAM RADIO GEAR For parts or not working . Automatic Level Control (ALC): Negative from 0, adjustable Listed under the Radio Equipment/HF Amplifiers/Acom 1010 category that is about Acom 1010 .
Eimac: 4CV8000A : 8000W: Vapor & forced air: 150MHz: This is a vapor cooled tube, which is quite rare at this size
The GU-74b / 4CX800A Svetlana tetrode is used in wide-band non-tunable amplifiers and for single-sideband power amplification in stationary and mobile RF equipment Die Preise dieser PA betragen bis 2500 Euro, die nachfolgende Lรถsung ist wesentlich preiswerter . Pair NOS/NIB GU74 4CX800 Transmitting Tubes/Valves OTK $ 50 homebrew hf tube amplifier, Jul 04, 2009 ยท 4 KW HF LINEAR AMPLIFIER with GU-78B by SV8JE .
Radio Kit Elettronica in archivio, i fascicoli del 2019
These tubes were manufactured in the tens of thousands in the mid to late 20th Century, so all those available in 2012 are N Some top of the line RF amplifier manufactures are using Svetlana tubes, like the 4CX800, 4CX1000 and 4CX1600 series tubes . Nella radio amatoriale, prendiamo ad esempio (solo per citare un esempio specifico) l'Acom 1000, che utilizza un tubo 4CX800 / GU74B per l'amplificazione della potenza Zkusme praktickรฝ nรกvrh, protoลพe ten nรกs zajรญmรก nejvรญce .
amp hf 3000 wattamplificatore lineare hf con parallelo di 2 4cx800 la0by amplificatore lineare vhf con push pull 2 4cx250 sm5bsz building high power amplifiers page how to run your (tube type - ed
Russian Soviet vintage fan-liked anemometer U5 wind speed meter 1980 BOXED The Emtron DX-1d Linear Amplifier is a 750 watt average output power, for the 160m through 10m amateur bands (9 bands), housed in a desk-top cabinet with self-contained power supply and cooling system . About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features Press Copyright Contact us Creators I carry a selection of EIMAC tubes , JENNINGS Vacuum variables and relays, BIRD line sections ,dummy loads, attenuators, and slugs, CSR high voltage door knob capacitors, plus .
C24 is a receiving three-section 400 pF variable air capacitor with two sections permanently in parallel, the third section is added while in 80 meter band, allowing greater impedance matching on this band
These were often used for driver tubes in FM broadcast transmitters (new old stock) but have lain on warehouse shelves for 25+ years . The performance characteristics of the 4CX800A allow its use as a high gain grid-driven RF amplifier or as used in grounded grid service We sell NOS (New Old Stock) GU-74b or 4CX800 tubes used in the Acom 2000A, Acom 1000, Acom 1010 .
Ceramic / steel tubes are the way to go, only because of the fact that the glass tube supply is all but gone
Emtron, firma mica din Australia, produce amplificatoare de putere pentru unde scurte bazate pe tuburile Svetlana, altele decat raspanditul GU74/4CX800 Matched pair means that they have been selected as two tubes with equal parameters . Tube GU-74B / 4CX800 / 4CX800A tetrode + SOCKET SK1A PL21B-1B NEW NOS Anode Cap Fits 3-500z, 3-500zg, 4-400, 4-400a $33 .
) Linear (975,720 bytes, PDF file) QST November 1962, pp
The Alpha 8410 utilizes an enhanced version of the RF deck found in the Alpha 99, but instead of the 2 x 4CX800โs that have been increasingly difficult to find, our engineers chose Two reasonably priced 4CX1500Bs This is a well built rugged amp that easily gets legal limit with about 45 watts drive, with lots of head room . Learn here how to clean vacuum tubes and keep them living long Its characteristics of low intermodulation distortion make it especially suitable for single sideband service .
3CX1500U7 /8962, 3CX1500C7, YU209 Transmitting Tube, YU209/3CX1500A7/8877, Eimac (NOS), 3CX10000B7, 3CX1500A7-EI Transmitting Tube, 3CX1500A7/8877 Eimac, 3CX10000H3-EI NOS Tube, transmitting eimac 3cx10000h3, YU158 Transmitting Tube, YU-158 / 8877, Eimac (NOS), 3CX1200Z7 Tube, Transmitting eimac (yu181), 3CX2500F3 Transmitting Tube, svetlana (8251), YU108 /3CX4500F3 Transmitting Tube, metal
It is absolutely important to replace the tubes with a matched pair DX Engineering GU74B / 4CX800A Ceramic Power Tetrodes are high-performance ceramic / metal tetrodes with a plate dissipation rating of 800 watts . I do not own a PGXL, but have owned other solid state HF amps in the past Vacum Tube GU-74B / 4CX800 / 4CX800A tetrode x 1pc .
8 - 30 MHz, remote control via serial line, automatic tune-up, two 4CX800 tubes, over 2000 W PEP output, built-in 230 VAC power supply
Forum: Discussioni: Messaggi: Ultimo Messaggio Discussioni : A Equipment: JST-JRC245 + Acom 1000 Amp (new small single 4CX800 tube) FT1000MP + Finn Fett KW Amp . Die GU74B/4CX800 ist eine bekannte Rรถhre, die auch in vielen kommerziellen Amateurfunkendstufen der 1KW-KLasse eingesetzt wird ( Alpin 100, ACOM 1000) temperatures above 1,500 C, the gettering action is reversed .
I don't know how much the QRO export model with 3 x 4CX800's costs, (and can't buy one even if I wanted to), so I can't give you a bang-for-buck rating
One Tube 4cx800-Single Tube 4cx800 Vacuum Tube transmitter Primary Power: 190-250 or 90-130 VAC nominal, 50-60 Hz, fused at 20 amperes . Of course the >>latter >>>tube will easier generate parasitics because its ability to amplify at >>>higher frequencies than the 4CX800 ฮฃฯฮฟ ฯฮฑฯฮฑฮบฮฑฯฯ ฮปฮนฮฝฮบ ฮธฮฑ ฮดฮตฮนฯฮต ฯฯฯฮฟฯ ฯฮฟฯ ฯฮฟฮผฯฮฟฯ ฯฮฟฯ 1431 ฮฮ ฯฯฮฑ ฮฮตฯฮฑฮนฮฑ ฮบฯ ฮผฮฑฯฮฑ ฯฮฟฯ ฮตฯฯ ฯฯฮนฮฑฮพฮตฮน ฮบฮฑฮน ฯฮฟฯ ฯฮฑฮนฮถฮตฮน ฯฮตฮนฯฮฑ(ฮผฮฑ)ฯฮนฮบฮฑ ฮผฮตฯฮฑ ฮฑฯฮฟ ฯฮฟ ฮ ฮฟฮปฯ ฯฮตฯฮฝฮตฮนฮฟ ฮฮตฯฯฮฑฮปฮฟฮฝฮนฮบฮทฯ ฮฑฯฮฟ ฯฮฟ 2001 .
La crise a du bon, les GU74 (4CX800) baissent et on en re trouvait en emballage d หorigine pour e70
We went through at least a dozen pairs of NOS 4CX800 ceramic tetrode tubes before we were able to match two which were close in specification AMP: Rake 174 (1 x 4CX800) ANT: Fiber Vertical HF600 Tagra . Name: GU74B / GU-74B = 4CX800 Type: tetrode Cathode type: oxide, indirect heating Application field: power amplification in broadcasting and SSB equipment Brief application: amplification Envelope: metall-ceramic Cooling method: forced air Dimensions: 90mm x 71mm Mass: 0 >>> >>>By the way, when is SVETLANA coming out with a direct replacement of the >>>3-500Z? There has been rumours of a 3-600Z tube, I heard .
One nice aspect about building a preamplifier from a kit is that you can change what you donโt like
Cathode voltage swing depends on the grid to cathode voltage required to move the tube through the conduction desired or required De plus il fonctionne de 160m ร 6M sans trou donc bien sรปr les WARC que je n'avait pas sur le 922 . Offered tubes (Soviet marks as GU74B) are made in the USSR at 1980-92 on this Svetlana factory, are full analogue and have the best parameters rather modern Svetlana 4CX800A tubes This meaty unit is completely self-contained with AC power supply and the rugged GU74B/4CX800 tube responsible for delivering the power .
Ouch You have clicked a page that seems to be very popular
I would like to add one thing and this is not a plug for a USA seller but DX Engineering sells these tubes for around $350 each with a one year warranty, they are GU74B's not 4CX800's so you don't have to go threw E Bay and buy from some seller you might not trust, yes the ones on E Bay are cheaper but what you gonna do when you have a bad rube Sachant que โVg1 de polarisation doit être de moins 56V, ceci est atteint déjà avec 31W et dès lors il faut une limitation part une résistance de contre réaction « Négative Feedback « comme du reste propos . This is a 7-pin socket made of high quality dielectric ) linear (975,720 bytes, pdf file) qst november 1962, pp .
The Acom and the Expert amps are 160 through 6M amps; the others are 6M only
Datasheet search engine for Electronic Components and Semiconductors 1) PA- Description: Easy and powerful contracted amplifier with 1000Watt pep Used GU74B (4CX800) ZZ-750 ัะฐะนั :// ั ะดะฒัะผั ะทะฐะฟะฐัะฝัะผะธ ะปะฐะผะฟะฐะผะธ ะะฃ-74,ัะตะฝะฐ 800$ . A pi-L network is used in the output circuit of the amplifier Any kind of oil and dirt on the vacuum tube on corrosion on the pins can disrupt the temperature .
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