Gi7b tube socket Even with outstanding cooling, higher powers result in severe thermal drift problems. gi6b tube To: <amps@contesting. ux3lvux3lv (460) 100% positive. Having trouble finding a socket for the GI7b, the supplier that I have used in the past seems to be out of business. MLA-2500 GI-7B Tube Sockets using 8875 Holes The first change was to use the original 8875 socket holes. $12. New technology parasitic suppressors 3. The LimaSDR selfmade transceiver 10PCS 7Pin B7G Tube Socket For EAA91 EC92 6X4 6Z4 6AQ5 EC92 EZ90 Tube AMP DIY. I verified the amp has a good 8875 tube: with 30w SSB in on 80m, has 500w out. 500-. This is a Yaesu FL-2100 amp, I converted to operate with GI7B tubes, including many improvements. Tropicalization: The “T” designation suggests the GI-7BT may be a ‘tropicalized’ version, featuring enhancements for operation in humid and hot environments. net (Jimmy Jones): Date: : Sat, 2 Feb 2002 11:53:56 -0600 Apr 27, 2012 · If you have 800V at . A pair of them will give you about 1200 to 1400 = watts depending on voltage and drive. This impressive Russian RF power triode is a rebuild of an ultra rare WWII German valve type LD9, and has the same physical size as the earlier German valve. The plate choke is an Ameritron 160-10 choke and is barely visible beneath the tubes. This video showing you how to tighten the pins on tube sockets GI7b ( similar to AEG LDa ) also GI70b (same tube - no cooler), Metal-ceramic transmitting triode up to 9 cm. Jun 18, 2021 · Heathkit SB-220 converted to use a pair of GI7B tubes. The modifications include: 1. Oxide cathode indirectly heated. Brand New. Pre-Owned. We have a great online selection at the lowest prices with Fast & Free shipping on many items! 20X 7-Pin B7G Homebrew GI-7B Sockets by Lawson Summerrow / W4EMF: Diameter of copper rings may require "tweaking" to adjust for suitably snug fit on tube contact surface Sockets. Tube socket,fan,chimney for GI-46b Heathkit SB-220 Kenwood TL-922 KK4NOZ 3-500z. gi6b tube Jul 3, 2021 · With some expert assistance at hand I am redesigning the valve housing and cooling system as well as upgrading the anode/cathode connection points. 00 WD8DAS SB-230 Amplifier Tube Retrofit Project Air-cooled Russian GI-7B triode replaces the conduction-cooled 8873. Free returns Aug 15, 2020 · GI-7b Radar Amplifier Triode. Feb 11, 2017 · About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright Apr 7, 2023 · After that i bought a parts SB200 just for fun and did that also with a single 7igb tube. Keying mod for 12VDC @17ma keying and rear panel RCA key jack. 39 Ohm resistor to adjust heater voltage! GS-9B GI-7B GI-6B GI-70B GI-7BT COOLER only GI7B GI6B and many other tubes. Contact seller. Drive. I thought about building one of the GI7B amps but haven't got enough parts to get it started. Top view. I thought you might like some photos of this prototype, including the cooling chimney make form a small fibre plant pot cut to size - it cools the valve very effectively VC1 to tube socket with heavy (6mm²) wire (left) and coaxcable (center). Mar 3, 2017 · About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright Apr 17, 2010 · I don't think KA4POZ still has GI7 sockets anymore. About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright Title: GI7B GI70B Author: Electronintorg Subject: JA-2003-01-16 Created Date: 12/14/2002 7:52:05 PM Tubes . The pictures show the short way to implement these changes. I did this as well with the Russian tube on my SB230. U. While restoring and/or repairing tube rigs, I find dirty tube pins and sockets to be one of the leadin I got it with the idea of putting a GI7B russian tube in it as I suspected the tube might be shot. Here below you will find some shots of the various stages of assembly and a short video of the final testand now ladies and gentlemen start your engine!Gi7b homemade amplifier#Gi7b #HF # KW3KW Rating: 2010-09-05; Nice Gain Time Owned: 0 to 3 months. In order to install a rigid air dam for cooling, the plate choke must be Mar 8, 2023 · Purchased an operating SB-230 that has a very good and hard to find 8873 tube. Wholesale bargains. Pre-Owned High-Quality 8Pin Vacuum Tube Socket Octal for KT66 KT88 6SL7 6SN7 6V6 5AR4 Search result for gi7B. 90. The cylinders are from rainwater down pipe and split for easy removal/fitting. Has quality K4POZ socket & bias board, new 12 volt filament transformer with solid-state timer for 90 sec filament warm up, new larger electrolytics in the power supply, new cooling fan and new 12VDC T/R relay & 17ma keying. The socket is installed temporarily to check tube clearance. He was also experiencing strange rus My first selfmade linear with one GI7B; My second selfmade linear with two GI7B; My newest selfmade linear with one GS35B; Little Speedy Linear for 11/10m repair; A 30 Watts FET Linear for the Lima; The 50Watt Linear with Bandfilter from KN-Electronic; Repairs and Build Transceivers. He put in a pair of the gi7b tubes and was able to = make a real nice amp out of it. 12PCS 7pin Tube Socket B7G Valve Base for 6X4 6Z4 EF95 EAA91 EC92 EF91 EZ90 DIY. With this linear you can make 350-400 Watts on SSB. :No screen supply required Test of the MountainTopElectronics two tube GI7bGreat little russian tubes. 5kV and 225W PEP. ) from the bottom of VC1 to one valve socket. 5kW triode (3. I also h The tubes are readily available from several vendors in the Ukraine at quite reasonable prices. So far the GI-7B has proved to be a great tube. com SOCKET for tubes gi7b, gi7bt, gi6b, gs9b. GI7B tube datasheet Heathkit SB-220 from nonsmoking environment converted to use a pair of GI7B tubes. . It sounds like 4 Gi-7b's would run forever. NOS (new old stock) These overseas made tube sockets are showing up in many Hello all. 5KW 3 X Gi7B, IK4EEP: Vacuum tubes, capacitors, nixie tubes, sockets: Wide Importer & IT Service nakatoyo. The replacements are NOS, and available in abundance via the internet at reasonable $/watt prices. GI7b and GI7bt are completed by factory with plate radiators (HgAl) and the others (#70) without (normaly used in water cooling items). Here are the steps after removing the 8875 sockets. com. Can provide the excellent condition socket & heatsink with it if desired. RF Deck Modifications – changing the tube sockets to GI7B sockets 1. It will do 1KW on HF with no problem. Feb 20, 2011 · linear amplifier (4) gi7b russian tube by W. And, as with all of my amplifiers, it has been given a name and this one is Piglet. Potentially addressing issues with loading on 160M and 80M A pair of Gi-7B tubes are wired underneath similar to Fritz, PA0FRI. Tube output w/50w drive: 800w out on 80 & 40m and 550w out on 20m, 600w out on 15 & 10m. Alex UR4LL for the intention of building amplifier for six meters. To digress a bit, contrary to common perception, there are still lots of microwave electron tubes in use, for example microwave ovens, radars, medical diagnostic equipment and satellites. Radio Communication; Vintage Find great deals on eBay for Gi7b Tube Socket. 00 List price: $ 160. Slightly cooling of cathode also should be provided. This bottom section will mount See full list on lavky. Output. Conversion/upgrades include: 1. The only other ones I have seen are by K4POZ. There is an article on my site = about the conversion a friend of mine did on an older Dentron amp that = ran 4 572b tubes. The net filter on the 220V side. Category. Shipped free in the USA. Optimized tuned inputs, W4ZT bias module, custom K4POZ sockets, sub-chassis micro blowers for the sockets, new GI7B triodes, calibrated multimeter, HV interrupter, current protected cathodes, lv doubler for controls, glitch protection in the plate circuit. New 12 VDC T/R relay---17ma keying 6. The PI-Filter hat two switchable coils, because the roller induct-or was to small. Year of production: 1975. New technology parasitic suppressors. Dec 12, 2023 · NOS GI6B, GI7B, GI9B, and sockets. Buy It Now +C $20. com> Subject: [AMPS] Alpha 76 and 78 tube conversions: From: : jjones@etex. Diode protection on meter & LED meter lamp 7. Apr 24, 2024 · NOS Lot of Four GI7B tubes and Sockets - Ham Radio - LL Amplifier Project Parts. Include description. I am seriously considering building a dedicated single band amp for 160 meters. and a small muffin fan running at reduced voltage. GI-46b or GI-23b tube socket Kenwood TL-922 & Heathkit SB-220 3-500Z KK4NOZ. Große Auswahl an Gi7b Tube Socket entdecken. Jul 23, 2021 · Clean Yaesu FL-2100 converted to a GI7B tube. This bottom section will mount Related: gi7b tube gi-7bt gi7b socket gi46b tube. GI-7B tubes and sockets Send this to a friend with an Apr 23, 2025 · GI-70B is the same tube, but without the heat sink. com) First, I pulled all of the stuff associated with the 572 tubes and sockets out, except for the tuned input. the chimney is made of PTFE (teflon). To: <amps@contesting. 1758. The text of the article is in Hungarian, of course, but the schematics and construction layouts are easy to follow. Drill a hole in the socket compartment and possibly mount a grommet. GU34B PA with original socket GU-34b original socket - SOLD NOTE: GU34B is able to work without any air cooling up to 350mA with plate voltage 2kV 2 SOCKETS for tubes gi7b, gi6b, gs9b with chimney $ 130. gi6b tube Sep 12, 2021 · Clean SB-200 converted to GI7B tube. $175 shipped or meet/pick up in San Antonio, TX area. AA4PG 3/30/2013 [email protected] Page 1 of 14 Finally, with the sockets in this position, there is very little space between the sockets and the plate choke. Subsequently use some 6 mm² wire (or RG213 etc. socket machined duralumin;. All. co. The GI7b amplifier in its finished state. The fan is mounted against a 1/8" thick soft material to reduce noise and any vibration. 80 W. Tubes are new, never used and in original polystyrene boxes. Tube is also physically identical to the GI-6B and GS-9B tubes, but there are some electrical differences. 37 shipping. A paper template is used to mark the holes for the socket on the right side panel of the amplifier. It uses the same socket as the 8873. Dec 3, 2024 · SOCKET for tubes gi7b, gi7bt, gi6b, gs9b with chimney. 62. GI-7B / GI7B URSS POWER COAXIAL TRIODE TUBE OTK/RHOMBUS/ NOS QTY-2. gi7b tube socket In year 2000, I have purchased a very nice Russian Tube (GI7B) from Dr. With the pair of tubes, I start to plan the project, including: 1) collect of parts About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright A hand-made (10 mm copper strip) clamp around the tube radiator holds it tight to the tube. 800ma to put out 1000 watt's cleanly on SSB and about 650-700 clean watts on AM with absolutely beautiful output on a scope. Reference Art. 7 pin. The second half of the article is a 4CX250B amplifier for 432 MHz. The data sheet for the GI7B tube is provided here. Socket from Cathode side, note 0. Power supply completely rebuilt; has solid-state timer for filament warmup; quality K4POZ tube socket and bias board. Sep 15, 2023 · Mountain Top Electronics Single GI-7B/GI-6B amplifier. GI21B, 110 W on 8. If = someone who knows what they are doing has an amp that has the 8874's in = it, and they want to change those out and would like to try the gi7b = tubes, I will sell you, for my cost, a pair of these gi7b tubes, and a = matching set of sockets. Quiet power switching relay prevents ON/OFF switch failure. C $2. In January 2007, I got another tube from Sing, VR2IL. Rear view. The tube was in a cooling case. The amp puts out 650 Peak on ssb on 80 and 40 meters with the tune control on the proper band markings. 2 × GI7B. As with most Russian power triodes, the heat sink on the GI-6b is removable. Most of them sample the drive level and create a negative voltage. Last I got were from a VE3 that sells only on Ebayjust search GI7B sockets there. WALLACE@xtra. New front panel overlay makes it look like a new amp. Under the RF chassis. Very high quality. Apr 3, 2023 · A very well built amp except for the tube sockets. GI-7B, GI7B, GI-7BT, GI7BT, Russian, Triode, Tube, Socket, Linear, Amp, Amplifier, Project, HF, VHF, UHF, w4zt, ham radio, amateur radio, uyless, uyless king, tony Aug 23, 2013 · Because the American sweep tubes has the same socket as an EL519 a modification would be a piece of cake. The bias circurit. I thought you might like some photos of this prototype, including the cooling chimney make form a small fibre plant pot cut to size - it cools the valve very effectively I am working on another Heathkit SB-230 conversion to a GI7b tube. NEW SOCKET for Russian tubes gi46b, gi23b You won't find a better made socket. A hand-made (10 mm copper strip) clamp around the tube radiator holds it tight to the tube. Figure 2 shows the sockets mounted and wired. <br> <br> The person who wants to do this can take a look at what I send them and determine if the tubes Mike, GØIMG and I are both using the Gi7B tube on 50MHz. The parasitic suppressors are Title: GI7B GI70B Author: Electronintorg Subject: JA-2003-01-16 Created Date: 12/14/2002 7:52:05 PM NOTE: Myriad tests have been conducted regarding the use of this tube for PAs at 23cm. 2 GI7B tubes reguire 2500V @ . He makes a nice looking socket. 2 tubes & sockets $175. New black aluminum front panel & case painted black to match. A 12v fan is mounted underneath blowing upwards and cylinders surround tube anodes to contain airflow. GS-9B GI-7B GI-6B GI-70B GI-7BT COOLER only GI7B GI6B and many other tubes. If someone who knows what they are doing has an amp that has the 8874's in it, and they want to change those out and would like to try the gi7b tubes, I will sell you, for my cost, a pair of these gi7b tubes, and a matching set of sockets. Unfortunately Tony passed away from melanoma cancer afterwards and wasn’t able to visit me. Very nice sockets! expensive $50 eachbut well worth the cost in my book He custom makes other GI/GS sockets alsoHe does excellent work IMHO 7 Pin Amphenol USA Black Phenolic Miniature Tube Socket B7G NOS Shield 147-905. A shorty explaining how I clean tube pins and sockets. We have a great online selection at the lowest prices with Fast & Free shipping on many items! 12PCS 7pin Tube The tubes GI6b, GI7b, GI7bt, GI70b and GI70bt are all the same GI7b (=LD7). Just to see if = the gi7b tubes can be a decent replacement for the 8874 tubes. or Best Offer gi7b tube socket. Get the best deals for Gi7b Tube Socket at eBay. GI7B amplificatore lineare 1. Replacing the capacitor board to make room for a 12V filament transformer while using low-profile capacitors. A complete overview. Russian impulse triodes Gi7i are cheap rugged tubes. 500 W. The tube is not for sale! Weight socket + chimney + clamp for fixing the chimney : 0,410 kg. GI7BT Tube Socket Plate GI7BT installation in an MLA-2500, View 2 MLA-2500 Power Supply Dentron MLA-2500 GI-7BT Modification W4EMF 11/30/01. Diode protection on both meters and LED indicators and new 3-wire grounded power cord, wired for 120VAC operation. The K4POZ sockets are excellent and can be used with the original chassis. During a visit to an HAM exchange exhibition (Radiantistica Expo) I came up with the idea of building an amplifier using the mythical Russian tube Gi7b. 3. Dec 3, 2024 · GI7b tube you see in the last photo is not for sale! For sale: socket, chimney, four chimney fastenings. Installing the filament transformer and a glitch resistor for fault protection. OK for HF and for audio as well. I normally do not like to bash quality of components, however this needs to be addressed. Jetzt einkaufen mit schnellem Versand und unkomplizierten Rückgaben. Quality K4POZ tube socket & bias board 5. I am a little baffled. I've been building with all three versions, and would be interested in hearing about your builds/setups with these. In input circuit of the GI7B tube. 80 m. About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright Mike, GØIMG and I are both using the Gi7B tube on 50MHz. Harbach soft-start wired for 120VAC operation 4. Hello everybody, this post is about my passion for DIY. n9zrq (950) 100% positive; Seller's other items Seller's other items; Contact seller; Universal BIAS for 3CX800, 3CX1500, GI7B, GS31/35B, GI46B & others triodes. I've seen several done by mounting the tubes horizontal and eliminating the tuned input, but I wanted to retain the input circuitry. This bottom section will mount Tube is NIB, passed military control. from Ukraine. HV relay added, originally HV was switched on/off with switch on front (rated for 250V NOT 2KV!) Coax relays replace original "Washing-machine" type. $40 ea. HF Amp w/new GI7B Ceramic Tubes. Sep 29, 2021 · Purchased a working Dentron MLA-1200 to convert to a GI7B tube. If anyone is interested, i should have the guys email or web site info here somewhere. €23. I thought you might like some photos of this prototype, including the cooling chimney make form a small fibre plant pot cut to size - it cools the valve very effectively Hi Tony: Excellent! That's great info. The power output limiting factor mostly is the power transformer. NOS (new old stock) Válvulas cerâmicas GI7-BT a venda para todo o Brasil. Shop with confidence. You can either cut away the chassis and mount the GI7B tube sockets on a metal plate (subchassis), and suspend this plate slightly below chassis level on standoffs, or you can attempt to mount the tube sockets in the original 8875 holes. (whatillo@gmail. The tube is being used quite successfully as an amplifier at 50MHz, however, and some say it is useful even as high as 432MHz. A standard 120x120 mm computer fan produces enough air to cool the tubes, part of which must flow into the cathode compartment to prevent the tubes from overheating. 800 ma on those transformer's your in the money. Switches gi-7bt / gi7bt soviet power coaxial triode tube nos /rhombus/otk qty-4 The larger the ceramic body of the GI-7BT, the better the tube can dissipate heat. </P> <P>The person who wants to do this can take a look at what I send them and determine if the Mike, GØIMG and I are both using the Gi7B tube on 50MHz. W4EMF was another fellow who did numerous tube transplants on many different Dentron amps. In both cases power output was higher than original tubes. The tubes GI6b, GI7b, GI7bt, GI70b and GI70bt are all the same MLA-2500 GI-7B Tube Sockets using 8875 Holes The first change was to use the original 8875 socket holes. Freshly gettered and tested. The power supply side with near 2000 Volt. Others. Jan 8, 2022 · The amp has quality K4POZ tube socket & bias board, NOS tube with new technology parasitic suppressor, new higher value power supply electrolytics, new T/R relay, new cooling fan, 12v filament transformer & choke and new solid state filament warmup timer. Anyone have Here's a copy of an amplifier by 9A6C that uses TWO GI7B tubes, in the end I used the coil dimensions given in this circuit for my single tube amplifiers anode RF circuit. 95. Has the following: 1. It is possible to derive a stable output of of up to approximately 250W from a single tube GI7B cavity PA, and designs for such PAs can be found on this web site. :No screen supply required A tube replacement of the same type is a lot less work. com: SOLD! For sale 10 VHF sockets for GI7B tubes Price-40$ each+shipping CHris Jan 8, 2022 · The amp has quality K4POZ tube socket & bias board, NOS tube with new technology parasitic suppressor, new higher value power supply electrolytics, new T/R relay, new cooling fan, 12v filament transformer & choke and new solid state filament warmup timer. He put GI7b tubes in just about everything. The old 8873 socket was not removed and will be used as a tie strip under the chassis. Base similar to GU43b. Selected category Consumer Electronics. NOS pair of GI7B tubes with quality sockets & adjustable bias board from K4POZ. These tubes = are really heavy duty. Top-Marken, exklusive Angebote und unschlagbare Preise bei eBay. 80 W SOCKET for tubes gi7b, gi7bt, gi6b, gs9b with chimney. Seller's other items Seller's other items. Working out the cooling and physical mount of the tube were a little challenging, but it works well. Margin scheme - You don't pay VAT! Gi7B new (NOS) Feb 24, 2018 · The socket question is partly solved, I have a pair of original GS-14 sockets from Lithuania. Search result for gi7B Rear Panel with Fan & Tube Socket GI7BT heater & cathode wiring Rear View; Original PA Input ckt used RF Compartment with GI-7BT air chimney GI7BT Tube in Socket A tube replacement of the same type is a lot less work. 50. 5kV. Heathkit SB-220 from nonsmoking environment converted to use a pair of GI7B tubes. Works up to 250 MHz, Ua max 2. 5cm - $10 and its socket - $8 GI7B & GI7BT 300-400W, HF to 300MHz; 250W thru 23cm) - $25 SOCKET for GI7B - $25 GI6B identical to GI7B except rated to 1300MHz instead of 3GHz; use same as GI7B - $20 GU5B 2. Oct 24, 2016 · About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright Oct 25, 2023 · GI7B Tubes, nos. First, remove the bottom section of the K4POZ socket. Einbau LED Orange € 0,95 „DPDT 6“ 2xON/ON Kippschalter 6mm € 0,55; Angebot! 2SC2879 HG 12V 100W HF Transistor This document provides instructions for modifying a Dentron MLA-2500 amplifier to operate with GI7B tubes. 00 (19%) Electron tubes; Tubes; Gi7B; Tube sockets; Tubes; Tube list Gi7B. Nov 29, 2019 · The socket allows easy insertion and removal of the tube. gi7b tube socket. 8 - 30 Mhz 1. Vacuum tubes. They completely contain/cover the tube, nothing left to see than the anode cap. Opens in a new window or tab. One of the original tube-socket holes can be enlarged a bit so this can be done without too much metal work. Maybe someday It has been my experience that ALC circuits do not work very well. 5kV on the anode and mine is a ‘mini’ version with 1. Plans are to convert the amp to a single GI7B tube, so the 8873 is not needed and for sale. com> Subject: [AMPS] Alpha 76 and 78 tube conversions: From: : NICK. Related: gi7b tube gi7b socket gi46b tube gi-6b tube. I purchased a nice tube socket / mount from a ham that makes them. High voltage section. G3MY chimneys for the GI7b work very well. I mount the tube socked in the holes where the fans were, for a vertical installation. gi6b tube 10PCS 7Pin B7G Tube Socket For EAA91 EC92 6X4 6Z4 6AQ5 EC92 EZ90 Tube AMP DIY. The grid compartment is a T match circuit. The project never starts. Jan 11, 2022 · SOLD! Clean, from non-smoking environment, GLA-1000 converted to NOS GI7B tube. 00 You save $ 30. Heatsink removed, plenty of vent holes all around. which is the :8874/3CX400A7 triode. $80/pair for the tubes, $175/pair for tubes & sockets. Feb 23, 2012 · The tube sockets are nice. Insert some protection against the wire touching 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 10PCS 7Pin B7G Tube Socket For EAA91 EC92 6X4 6Z4 6AQ5 EC92 EZ90 Tube AMP DIY Válvulas cerâmicas GI7-BT a venda para todo o Brasil. 9 pin. If someone who knows what they are doing has an amp that has the 8874's in it, and they want to change those out and would like to try the gi7b tubes, I will sell you, for my cost, a pair of these gi7b tubes, and a matching set of sockets. 5kW on HF) - $110 GU48 kW glass triode. 2. - $80 SOLD! For sale 10 VHF sockets for GI7B tubes Price-40$ each+shipping CHris New tube socket made from 10mm Aluminium. GU-74B. SUPPORT UKRAINIAN SELLERS BY SHOPPING HERE New tube socket made from 10mm Aluminium. US $80. This has nothing to do with the Disney movies, i decided on Piglet as I consider the amp to be the daughter of my GS35b amplifier that acquired the name 'The Pig', the reasons for that can be found elsewhere on my web site. Luftkanal (chimney) für GI7B und G16B Senderöhre € 15,00; Ähnliche Produkte. Helpful details: GI-7B Amplifier Schematic: 2-tube GI7B-HF-Amplifier Schematic GI7B und GI6B Röhrensockel + Luftkanal, Angebotspaket € 60,00 Ursprünglicher Preis war: €60,00 € 58,00 Aktueller Preis ist: €58,00. After Tony passed away Ron K4POZ kept selling tube sockets and bias boards that Tony designed. Fitting two gi7b tubes into the SB200 doesn't get you much more output, just not enough B+ current available for more. Mike’s runs at 400W PEP output with 2. the chimney is made of PTFE (t eflon). We have a great online selection at the lowest prices with Fast & Free shipping on many items! In response to A LOT of emails I get, here is a video explaining how much drive these tubes require. Filament and 12vdc power supplies. Mar 23, 2025 · For sale: socket, chimney, clamp for fixing the chimney. nz (Nick Wallace): Date: : Sun, 3 Feb 2002 19:20:49 +1300 Bonjour et 73 voici la description mon amplificateur HF équiper de trois GI7B le projet à débuter en parcourant le web je consulter le cite de yu1aw sans le quelle ce projet n’aura jamais abouti étant électronicien de métier je ne pas connu des lampes les caractéristiques et les petites astuces je ne le connaissais pas. New power supply board assembly 2. The owner told me the octal tubes / sockets were looser than a goose. I tend to build the sockets in my own, so that the tubes are visible, clamped by the contacts, no soldering. 80 W Aug 8, 2008 · small labs f5mag rf concept gi7b 1500 w Mar 23, 2025 · For sale: socket, chimney, clamp for fixing the chimney. 6S33S-V / 6C33C-B. Gi7b shows excesivecathode overheating in case of insuficient cooling. Original anode coolers was replaced with hi power rectifier coolers which perfectly fit and allows better cooling by easy-to-find axial blower. 4. Sometimes it works better than GU74b. C $108. Filter. You won't find a better made socket. Get the best deals for gi7b socket at eBay. An 8-pin octal plug was secured to the bottom of the choke and it is mounted in an octal tube socket. 8 pin. Material: socket Help center. New pair of GI7B tubes w/custom high quality stainless steel sockets. Search for component: sample: PL2-pT MC-7 : Multiple search: sample: 6N1P-EV Tubes, sockets etc. This is a radar amplifier tube designed to operate while pulsing at up to 9 kV and 3 GHz. This change will make wiring the sockets in parallel much easier. vnjccwipssswaiadeztjfzfzizpmssttvqmhxivqebaydfad