Kenwood 520s driver tube

Pictured above is the business end of a kenwood hybrid ts 520s, the tube final section with the high voltage cover removed. The kenwood ts 520 s is one of the most popular hybrid transistorized receiver tube transmitter transceivers ever produced. Lots of parts from several kenwood ts520s radios such as the. Here is the tuner similar to the one i use with my 520s. The kenwood ts520 is designed for ssb and cw modes in the 80 through 10 meter ham bands. Kenwood ts520 ssb transceiver repair radio boat anchor. The kenwood ts 520 was the most interesting piece of amateur radio equipment to me. If you can spread it open a bit, the tube will just slide out. Home of the am pressexchange, the am forum the largest bbs of its kind,and the am classifieds, photos, audio, and technical information.

The builtin power supply requirements is 120vac or 220vac at 5060 hz and the power consumed is 292 watts on transmit and 38 watts on receive with the heater off. How to neutralize the final tubes on a kenwood hybrid ham. It is the 12v heater version of the 6146a, type number 6883b 8032a 8552 made by rca and others. 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 output tubes should be ok if not abused during tuning. It uses a pinet output, so has to be tuned with the dip and load method.

Downloadable manuals and info for kenwood ts520s, manuals for dg5, manuals for at200, at230 manuals for vfo520s. Is it easy to replace the tube, not the 6146 but the. With a right angle screwdriver remove the two screws. Pictured above is the business end of a kenwood hybrid ts520s, the tube final section with the high voltage cover removed.

The ts520s would not compare as favorably, even though a digitalreadoutequipped version retailed for quite a bit more than the 530 does. They are good radios, but they arent as simple to operate as a fully solid state radio and can be trouble if the high voltage power supply has issues. They were mostly solid state radios, but they use a 12by7a driver and two 6146b finals. Illustrating the problems i have had with my ts520s. Whats acceptable for repair kenwood hybrid restoration. What is the difference between a ts520s and a ts520se. I see you just want to replace the driver low power output. I have a new tube, but i cant get the old one out of the shield. Provision is made for installing a kit to drive kenwoods external dg5 digital frequency display. Replace resistors ken k4eaa or jim ke70ay have replacements 6.

Kenwood uses the s2001 6146b to deliver over 100w to the antenna. This is an extract from kg6haf on how to tune a kenwood 520s tnx ward. Back to kenwoodtrio next hf and more last modified 20160322 kenwood ts520s specifications. Mfj290k microphone, ge tube, electron tube 2x kenwood ts 520s javascript seems to be disabled in your browser. If you have to replace the driver or final tubes you should retest by transmitting into a dummy load to see if this resolved the problem. Other features include rit, vox, noise blanker, attenuator and carry handle. The main category is manuals of amateur radio transceivers and equipment that is about ham radio manuals for amateur radio. Buy, sell, trade hf and vhf equipment, towers, antennas, rotators and more. If you have good final tubes, a good driver tube, good alc, good hv caps, screen grid voltage is right, and good cathode and screen grid resistors, but there is still low output power, what could it be. As a kid, the first modern radio i owned was the kenwood ts520s. Complete primo tube tansmitter tubes wth matched gain. Cabinet feet kenwood ts 820 820s ts 520 520s 520se 530 830 3d print free. The kenwood hybrids are beautiful radios, and the ts520 is the first radio i was on the air with on amateur hf bands while i was in high school in the early 80s.

Find great deals on ebay for kenwood ts520 and kenwood ts530. The new ts520s is completely solid state except for the driver 12by7a and the final tubes. Kenwood s engineers turned to valves tubes with a 12by7a driver and two 6146b final amplifiers. Provision is made for installing a kit to drive kenwood s external dg5 digital frequency display. However, they dont have am, and cant be made to transmit on am without major surgery. Im just starting to replace parts this rig is 40 years old, everything seems to be working though. The combination of solid state and vacuum tube technologies provides an. Provision is made for installing a kit to drive kenwoods external dg5 digital. As a kid, the first modern radio i owned was the kenwood ts 520s.

The outputs must be super to put out more than you. Is it easy to replace the tube, not the 6146 but the single. Usually i can pry the shield apart a bit with a small, thin screwdriver. Kenwood ts520s amateur hf cwssb transceiver 16010 meters. Back to kenwood next hf and more last modified 20160322. View and download kenwood ts520s operating manual online. Use this to switch the cw or ssb filters by wiring the brown lead, which normally is transferred to the cw terminal on the if unit, between. To the best of my knowledge, the s2001a is a kenwood part number. Kenwood uses the s2001 6146b to deliver over 100w to the antenna very efficiently. The final amplifier uses 3 tubes, a 12by7a as the driver and two 6146bs. The 6146b finals and 12by7a driver tube will easily last a decade or two, and. Kenwood models ts830s, ts530s, ts820, ts820s, ts520, ts520s, ts520d, ts520se, ts520sp. The 520 model didnt have the dk5 installed from the factory like the s model, and while you can find the dg5 displays fairly easily, the dk5 that makes it work with the regular 520 are hard to come by. Oct 25, 2011 i have a ts520s that i inherited about 23 years ago and used aboard our sailboat for several years.

Sufficient rf drive voltage level at final tube control grids to overcome the dc. The combination of solid state and vacuum tube technologies provides an architecture best described as simple but elegant, and it produces the fine audio quality for which the kenwood hybrids are noted. The receiver is working on all bands receiving signals all of voltages internally are correct. However after multiple attempts to tune the old girl up, the best she would do was 40 watts out. Kenwood ts 520s amateur hf cwssb transceiver 16010 meters. The 6146b finals and 12by7a driver tube will easily last a decade or two, and are commonly available on ebay and elsewhere, very inexpensively. Adjust coil packs kenwood ts hybrid transceivers with. Mfj290k microphone, ge tube, electron tube 2x kenwood ts520s javascript seems to be disabled in your browser. Kenwood has a worthy successor for the venerable ts520s, a successor that has a lot to offer at a reasonable price. From an estate, a clean kenwood ts520s with power cord for 120vac and microphone. Designed for operation on ssb or cw, the ts520s delivers. The tube i favour is a different type but a near drop in replacement. Nov 09, 2014 illustrating the problems i have had with my ts 520s. The one thing that i did not illustrate was that adjusting the car control does not keep the alc reading from behaving the same wayit still.

The modification came originally from jim, wb4wbl af mars afa2fn in tampa, florida. About kenwood ts520 manual the resource is currently listed in in a single category. From an estate, a clean kenwood ts 520s with power cord for 120vac and microphone. It inspired me to study for my amateur radio license. Lots of hams swear by them, and very few swear at them.

When i went to college i sold it to the manager of the dorm i lived in and never looked back. The ts520 manufactured from 1978 1980 was succeeded by the ts520s in 1980. This hybrid combination of solid state technology reliable, low power consumption and vacuum tube technology high efficiency, linearity proved to be extremely successful and popular with radio. It is not a direct replacement for the original tube. If you have good final tubes, a good driver tube, good alc, good hv caps, screen grid voltage is right, and good cathode and screen grid resistors, but there is. A minature spdt switch may be installed at the operators preference, on the rear side, or bottom panel. You are adjusting the operation of the 12by7a driver tube. It should be a loose fit over the new tube, until you slide it over the attached ground strap on the socket. How to tune up a kenwood ts830s hybrid rig transceiver. Well if all those things are good, by the process of elimination, the only thing left is. Further investigation revealed the 12by7 was on its way out.

The ts520 features a very accurate linear analog display dial. The kenwood ts520s is designed for ssb and cw modes in the 160 through 10 meter amateur bands. The kenwood ts 520 s is one of the most popular hybrid transistorized receivertube transmitter transceivers ever produced. How to neutralize the final tubes on a kenwood hybrid ham radio using a 2nd receiver. The kenwood ts 520s is designed for ssb and cw modes in the 160 through 10 meter amateur bands. The biggest and best ham radio classifieds on the web. View and download kenwood ts 520s operating manual online. As can be seen, this transceiver can be improved with the addition of two more filters. For kenwood amateur transceivers ts 520, ts 520s, ts820, ts820s, ts530s, ts830s, and more.

There was no output and the ip meter was at 0 for plate current. Jan 26, 2016 is it easy to replace the tube, not the 6146 but the single tube in the kenwood ts520. I believe the tube you are looking for is the famous and fairly common 6146. For kenwood amateur transceivers ts520, ts520s, ts820, ts820s, ts530s, ts830s, and more. Looking down at the vfo unit on the driver tube side you will see a small plate with two machine screws holding it on the vfo cover. Kenwood ts520 repair kenwood ts520 repair complete, success. Kenwood wants to be sure the idling current of the plate is at 60ma before you begin. Feb 20, 2014 how to neutralize the final tubes on a kenwood hybrid ham radio using a 2nd receiver. It works it receives its transmits full power good strong 6146b transmitting tubes and good 12by7a driver tube. Digital display for older rigs worldwidedx radio forum. This combination produced a power input of 200w pep on ssb, 160w dc on cw and 100w for fsk.

This may have been my fault when i was checking things out a couple months back. Well if all those things are good, by the process of elimination, the only thing left is in the final cage itself. Last modified 20160322 kenwood ts 520s specifications. Seller assumes all responsibility for this listing. The kenwood ts520 and 820 series used the s2001a pentode, which are direct equivalents of the rca 6146a. Is it easy to replace the tube, not the 6146 but the single tube in the kenwood ts 520. Kenwood ts520 530 820 830 primo tube set 6146b 2 12by7 ham.

A site dedicated for the am radio amateur and vintage radio. The s model has the analog dial and is a solid state transistorized rig except for tube finals and driver. Illustrating the problems i have had with my ts 520s. Rather than substitute tv sweep tubes as final amplifier tubes in a. When attempting to tune the 520s, i am getting absolutely no plate current while tuning the plate. Unless you like to tinker with tube radios, id stay away from the ts520s. Back to kenwood next hf and more last modified 20160322 kenwood ts520se eeconomy specifications. New display tube for dg1 the original display tube ld8109 used in the dg1 digital display for the ts820 and ts820s has been discontinued by the manufacturer. Many other tube types will work with equal performance. The photograph on the right is a close up of the rock solid chain and gear drive system that kenwood installed on these hybrid transceivers. Ive been looking for a digital display for my newly acquired kenwood ts520. Kenwood ts520 ssb tranceiver azden pcs3000 2m fm transceiver tentec century 21 cw transceiver yaesu frg7700 all mode transceiver mfj 949c antenna tuner the kenwood ts520 was the most interesting piece of amateur radio equipment to me. Kenwood ts520 530 820 830 primo tube set 6146b 2 12by7.