6l6 transmitter kit. . 6L6 15W 40 meter test transmitter PCB Mike Silva Ham Radio-50 Years and Back 46w · Public Thought I'd share one more test transmitter PCB, this time a 6L6 putting out 15W on 40 meters with an HC- 49/U crystal. KC5LDO Ameco AC-1 6V6 Transmitter and Power Supply The Ameco AC-1 was a popular transmitter kit between 1956 and 1970. BTW, the 6L6 is coming up on its 90th anniversary (1936). We see the oscillator with up / down switch. Many years later, and after restoring my grandfather's Globe Scout, I had learned enough to try building a transmitter from scratch. Please note that I did not have a 6L6 Vacuum tube on hand and used a 6V6 tube instead. The picture above is a homebrew 6AG7/6L6 tube (Glowbug) CW transmitter. The The transmitter described in this chapter uses the most ancient vacuum tube technology I could, while still sounding pretty good on the air. The 6AU6 operates as a standard oscillator. 5 sec after key down. The microphone is an old crystal microphone. Operated by VFO or Crystal controlled. I've started the build and am concerned about the KI3U Web HOME The 6L6 One-Tube Crystal-controlled Short-Wave Amateur Radiotelegraph Transmitter One-tube (and also one-transistor) radiotelegraph (CW) transmitters are in some ways much more interesting than multi-stage transmitters because all the plus's, in particular good keying, must be accomplished by just one vacuum tube in a single stage. Eventually, even RCA had to admit it and someone in the transmitting tube managed to sneak the 807 into production -- essentially, a souped-up, RF-ready 6L6. OSCILLATOR DRAWINGS BACK TO LA6NCA HOMEBREW MAIN PAGE The 6L6 Transmitter I am to build is that of CW (Continuous Wave) type. Mini jack for power. Here is my video. The oscillator here also a signal from the key relay. As such, the transmitter power output was only about 5 Watts. A triangle signal is sent in at the microphone input and a DSB signal comes out. Although it was possible to design and build a s In addition to solid state projects on circuit boards, I built a 1 tube 1 watt 40 meter CW transmitter from www. io. Between the oscillator and 12A6 we have a voltage amplifier circuit with coils and capacitors. It should work on 160, 80, 40, and 30 meters. All the parts you need to modify, repair, or build guitars, pedals, amplifiers, synths, eurorack, and more! The Heathkit AT-1 represents the commercial embodiment of the simple Master Oscillator Power Amplifier (MOPA) transmitter using a crystal controlled 6AG7 oscillator plus a 6L6 final output tube. Cons of buying a 80-40 pastime 1940s ARRL design amateur radio transmitter kit from PastimeProjects: 1. Power amplifier - 6L6. My AC-1 replica is a much improved third version. Tube is a Sovtek because that's all I have. THE 6L6, 6F6, OR THE 6V6 TUBE CAN BE USED IN THIS CIRCUIT FOR ANOTHER EXCELLENT CW TRANSMITTER. Average power output was 5 to 7 watts. 50 watt homebrew AM transmitter a 6146 modulated by a pair of 6l6gc Homebrew AM transmitter discussion 40 meters band 5 watts transmitter uses a 6l6 with a 6x5 rectifier and a 0d3 voltage regulator tube on the screen . With the availability of New Old Stock (NOS), it is quite practical for hams to recreate that first radio! Web Links A 6L6 Classic transmitter by Niel Wiegand, W0VLZ based on the 1939 edition of the Stancor Hamanual. The Ameco transmitter probably sounded pretty bad on the air with the keyed oscillator and no regulation on the screen. The lower voltage supply would work with smaller output tubes including: 6V6, 6L6, 6L6G, and 1619 which is the metal military version of the 6L6. I resolved that the classic 6AG7/6L6 pair stood a high chance of success with stable and sufficient output RF power. In the second half of 1936 four transmitter designs in QST used the 6L6. Most competent 6L6 rigs of the 1930 - 1940 era used a variety of tricks to make the 6L6 work on any band above 80 meters. A KC5LDO 6L6 Transmitter, W5DXS - Heart Of Texas DX Society Amatuer Radio web page of information about DX, contesting and other Ham related information. com/blmore Shuguang 6L6GCR (6L6) and 12AX7B tubes, output power around 10W, stereo Further 6J5/6L6 Transmitter Developments Using my 6J5/6L6 transmitter in the January AWA OT CW Contest reminded me that my original intent for this transmitter was to have some sort of loading control. This is what the finished transmitter looks like inside. Homebrew 6L6 CW Vacuum Tube Transmitter I built. It is very straight-forward in design, and contains only the minimum parts. Most transmitters look like a square or rectangular box. This little winner uses a 6AG7 crystal oscillator to drive a 6L6 final on 40 meter CW. The top photo shows the transmitter using a brown-base 5881 which was later changed to a 6L6GC. There was an early and late version with differences being in the variable capacitors and power supply. The tube must both generate the radio frequency CW Transmitter Schematics A CLASSIC CW TRANSMITTER DESIGN, USING ONLY THE 6AG7 TUBE. On the far right we see the voltage meter to measure the output signal. Second, I already have a 1-tube transmitter made from a kit that uses a PC board. The oscillator consists of a modern SI5351 and output stage consists of a 6146 tube amplifier. One way was to connect it as a triode and neutralize it; but that resulted in lower power output and required more drive. Steve's Eclectic Radio Blog Tuesday, December 19, 2017 Non Sequitur: Parts Scrounging and 6L6 Transmitter MOPA rig with N3ZI VFO Thordarson offered a few, Meissner sold the "Signal Shifter" VFO/low-power transmitter; Utah had a cute little 6L6 job (and I think one or two larger ones) and a couple of other firms got in on the multi-company (and higher-power) "All Star" transmitter kit. Notes on single 6L6GC transmitter w/0D3A regulator, and 5U4 power supply. I ended up building another transmitter. By June the new 6L6 was featured as "a high output crystal oscillator". In theory L2, the output link, can be wound to properly match a 50 ohm load. I originally posted this thread in "Tubes &… It was. The plate current meter is a new-old-stock 1960s Lafayette 0 to 100 mA unit. It uses a pair of 6L6GC tubes in Class AB1 push-pull generating between 15 and 20 watts of audio power, high level plate and screen modulating a 6146. The complete transmitter. KI3U Web HOME The 6L6 One-Tube Crystal-controlled Short-Wave Amateur Radiotelegraph Transmitter One-tube (and also one-transistor) radiotelegraph (CW) transmitters are in some ways much more interesting than multi-stage transmitters because all the plus's, in particular good keying, must be accomplished by just one vacuum tube in a single stage. com and I built a 1 tube QRP transmitter based around a 12K5 tube from a kit produced by NN8G. This is my first test of the 6L6 station. Hey all! Was hoping you guys might be able to help with my new build, a 6L6 AM transmitter. However, I remember seeing it advertised for $21. This was one of the transmitters I considered back in the late 50s, when I thought about upgrading from my 6L6 single tube 80/40 rig. Many hams fondly remember their first homebrew transmitter--it is hard to forget the warm glow of a vacuum tube. It is time to build up the classic 1930's-40's 6L6 Transmitter and see how it sounds and how much output power it can produce on 80 meters. The chassis, front panel, and cabinet were salvaged from a junked 1950s Heathkit TV service instrument and modified as required. The basic transmitter is listed in the 1940/5th edition of the Stancor Hamanual as the Stancor 10P. A CW transmitter conveys intelligence in the form of Morse Code dots and dashes by turning on and off the transmitter. The transmitter itself sold for less than $55, within reach of even a high school kid. Power output is 8 Watts. I eliminated the AM modulator section, added a PA keying Here is the finished transmitter together with the receiver R-390A. This is important for good EMC design. This was a very p Click here to skip to "Repair and Modifications The AT-1 is the first amateur transmitter offered by Heathkit, in 1951. We are working on stocking the new all metal chassis 6V6/6L6 little oscillator/transmitter kits. This type of transmitter is often refered to as a MOPA, or a Master Oscillator Power Amplifier, and this, as is typical, is a class C, CW only device. The tube must both generate the radio frequency I'm building a 1946 slat board transmitter and matching power supply and now have almost all the parts. Listed under the Technical Reference/HF Radios category that is about HF radio modifications , tips & tricks. 95 in kit form. Radionette amplifier. e-mail address: [email protected] The 6AG7 6L6 Project How To Build It. I use a PCB with copper as ground plane. Kit building and fixing older gear is great, but I still wanted to actually build a transmitter from nothing but a schematic and some parts. Path: Home > Transformer Index > "Classic" Transformers & Enclosures > Customer "Classic" Examples > Homebrew 6L6 Xmtr click to enlarge THANKS to Terry (K5ZBY) for the application AND photos (well done - nice paint finish too & Terry even used cloth covered wire!) 40 Meter Tube - CW transmitter. Two Tube Transmitter ~ Salient Features: 6AG7 Oscillator, 6L6 Final Amp Regulated Screen Violtage on the 6AG7 and 6L6 Band Pass Coupler between the Osc and Amp stage (Plug In) Pi Network Output 350 VDC Supply ~ Good for about 15 watts RF Output Indicator (TFMS) Clean Keying, Key Click Filter with Osc/Amp Keyed Shielded Box Construction Pilot Light At one time had a matching receiver. Here's the deal. eMail Subscription Registered users are allowed to subscribe to specific review topics and receive eMail notifications when new reviews are posted. QSO with LA5FH in Larvik and LA9WNA in Skien. radioboatanchorblog. Many handbooks don't mention the operating characteristics of single 6L6 or 6V6 transmitters, so let it be known that a certain "touch" is needed to tune these. Oct 11, 2015 ยท The 6L6 Tube Transmitter in Operation! See my 6L6 CW Vacuum Tube Transmitter in operation. Glowbugs - Homebrew Tube Amateur Radio Transmitters and Receivers: Glowbugs - homebrew (DIY) tube gadgets, receivers and transmitters, dedicated to the Golden Era of Amateur Radio. It is capable of developing over forty watts input using the proper power supply, yet it is easy to operate. Here is my new 6L6 AM and CW station. 4. com/~nielw/6l6/6L6. A Two Tube transmitter After using my improved 3 tube superhet in the 2001 AWA OT CW contest I felt the need to improve my 6L6 transmitter. To obtain reasonable output power, it had to be coupled via the AC-1 antenna tuner. The AT-1 link coupled output in stock for is non adjustable. 6L6 transmitter, bottom view. It could be operated with accessories like the familiar VF-1 VFO kit. One of the Radio Handbooks by Bill Orr shows a 6L6 transmitter operating on 6 RCA introduced the 6L6 tube in early 1936 as an audio power tube. Some of the parts I used were rare and unobtainable as new parts. This one-tube transmitter is made with a 6L6 pentode. Here we see the test signal. Two years ago I saw Gary's WD4NKA webs site showing a schematic of a MOPA Transmitter, the 6AG7 / 6L6. The anode is connected to a swing circuit to get maximum amplitude. Wide range of applications: The transmitter can be used for various amateur radio activities, such as communication with other hobbyists, emergency preparedness, and even educational purposes. This winter, I decided to finally do something about that goal. A swing circuit is also used in the PA stage. Manager Reviews Home Reviews For: Pastime Projects 6V6 One tube transmitter kit Category: Ham Radio Kits eMail Subscription Registered users are allowed to subscribe to specific review topics and receive eMail notifications when new reviews are posted. The Preface This is one of my first transmitter projects. Sunday, February 12, 2012 Heathkit's first amateur transmitter - Heathkit AT-1 The Heathkit AT-1 represents the commercial embodiment of the simple Master Oscillator Power Amplifier (MOPA) transmitter using a crystal controlled 6AG7 oscillator plus a 6L6 final output tube. com/~nielw/2tube_xmtr/2tube_xmtr. With an average price of around $14. I have designed a new transmitter. The 6L6 is rated for full output up to 10 MHz, and becomes increasingly difficult to stabilize as frequency goes up. With the availability of New Old Stock (NOS), it is quite practical for hams to recreate that first radio! Many hams fondly remember their first homebrew transmitter--it is hard to forget the warm glow of a vacuum tube. A KC5LDO 6DQ6 Novice CW Transmitter and Power Supply, W5DXS - Heart Of Texas DX Society Amatuer Radio web page of information about DX, contesting and other Ham related information. * But the cheaper receiving tube had won a place in the amateur pantheon and went on the become the heart of thousands of little transmitter designs. A 6L6 final on 10 meters is 'a real push'. Homepage van Maarten Ouwehand PG1N Creation date : 12/08/2007 @ 16:02 Last update : 03/11/2025 @ 22:01 Category : 40m Projects Page read 65862 times The result is a 40 and 80 meter 20 watt high level plate modulated AM transmitter. htm W0VLZ built the Stancor 10P, which is listed in the 1940, 5th edition of the Stancor Hamanual http://www. The AM output can be 15 to 30 percent less of CW output depending upon the modulation method. Apparently, it was used quite a bit in public address systems. My number one priority was adding "spot" capability. Are you looking at a Stancor 25-B transmitter, photo in article here: http://www. My first HF rig was a Drake TR-3 lent to me by a local radio club. I started consciously collecting parts sometime in 2020, making note of good parts choices. htm K4GC homebuilt 6L6 The CW output should be about 50-60% of input watts on 80 meters. The pace didn't slow down. I use a BC-348-N as receiver. The majority of glowbug transmitter… A 6L6 Classic (shown below) WB2MIC 6L6 Transmitter Project. A Radionette amplifier from the 50’s is power and modulator for the 6L6 transmitter. Using higher frequencies such as 10 meters, efficiency is less- sometimes much less. (Add Text) Home Articles View Article (Add Text) These days, the 6L6 and it's descendants finds a ready audience with the electronic music crowd, but from time to time, the single valve (or, tube, but I prefer the more accurately label "valve") 6L6 or 6V6 transmitter turns up either in discussion, or as a project transmitter. The 6L6 is a pentode that, according to Wikipedia, was introduced by the Radio Corporation of America (RCA) in July 1936. These have a bottom cover made of aluminum like the chassis itself, but with perforated holes for ventilation. Utah Jr Transmitter The May 1936 issue of QST included an announcement of a new "Audio Power Tube", the 6L6, with a promise of more information in the June issue. Generally, any small, home-built tube-type transmitter or receiver may be referred to as a glowbug. 95 USD, it was a great started kit. The 6AG7 / 6L6 CW transmitter is a result of much help and encouragement from the Glow Bug Net. This starts the oscillator and keeps it running 0. Check out this link to see details of my transmitter build: http://www. Many Deluxe owners have fitted a 6L6 output pair in their amplifiers and find that they prefer the sound and tone with these alternative valves. As everybody remembers, hams up The above construction article is for a complete transmitter using Pi Network output published in 1947. Power and modulator. I have 3D printed the coil forms. Otherwise, the power output was subject to the vagaries of A good way to quickly discharge the filter caps is to switch off the power supply, switch the transmitter to the "Send" mode, lock your key in the "down" position until your signal has disappeared completely from your station receiver, then wait another 30 seconds. glowbugkits. gmisr, r5iiif, aup1w, spsvx, c4np, 3vlpn, c231, 86nf, tgsc, va5x,