The circuitry of the following stage is a voltage amplifying circuit of a classa operation, and a driver circuitry and an output circuit adopt a complimentary scheme, carry out the operation near a classa, and are reducing crossover distortion. Output transistor stereo receiver amplifier crossreference chart transistor crossreference chart showing stereo receiver amplifier models that use the same original oem output transistors semiconductors. This is a pair of 2070 fully tested, working date code 1979. It allows the listener to hear layers, even in mono. Use our extensive knowledge, experience and customer feedback to select retube packages that will work great in your tube. Every capacitor and every power and driver transistor has been replaced. If you really want a tubed mcintosh preamp, you might find the solidstate rectified units to be a better match to your 2300 as theyre a bit quicker. I have a mc2300 in for service with a bad driverboard and need help locating suitable replacements for an pnp npn pair. Page 8 main 750761 sch 2 of 6 decoder poweron data sdata driver sclk sclk reset. I think that these boards are the same as many mc amps. It has been serviced by syd beaumont at ideal innovationstire kickers stay away.
Even with mono recordings, there was a greater sense of body, despite the lack of leftright differentiation. New listing mcintosh mc2500 mc2500 stereo power amplifier amp for audio sound used excellec. The use of 10 complementary connected output transistors per channel, allows not only full power output into normal loads, but extra high current output to drive uneven speaker loads. Of the numerous tube audio amplifiers produced by mcintosh over many years, the mighty mcintosh mc3500, or its industrial version the mcintosh mi350, designed by mile nestorovic in about 1968, is unsurpassable in my humble opinion, the greatest commercial tube amp ever made. Online warranty registration is available only for products purchased and used in the united. Its a 300 watt per channel stereo or 600 watt mono amplifier, its a 1yxxx serial number. Save mcintosh mc2300 to get email alerts and updates on your ebay feed. Hmm, we dont have any listings for this product right now. This is the amp they called the jerry garcia mac as the gratefull dead used these amps to fill a stadium with sound. This amp is still sought after by audiophiles all over the world for its ability to.
If you havent been to my main page, please check it for mcintosh related sites and personal information for information and prices on the current line of products, contact mcintosh laboratory, inc. The outputs consist of twelve mcintosh 070 to3 npn transistors. Gate driver transistors are designed to minimize switching losses with emitterfollower configuration and optimized pinout. Corderman joined mcintosh and was placed in charge of engineering, research and development. I think that these boards are the same as many mc amps i know that the drivers q112114 are 2n5320 and 2n5322 but what are the q108q110 and q102q104 do someone has an idea about the original parts numbers or replacement parts numbers that have the same characteristics as original parts. Introduced in 1961 as the powerhouse of that eras newfangled stereo tube amps two 75w amplifiers in one chassis.
Its left channel output transistors were on their way out so i handed it over to a. Mcintosh laboratory is a manufacturer of highend audio equipment based in binghamton, new york. The mc2300 is more or less the antithesis of the much slower c20. Mcintosh mc2300 sm service manual download, schematics. Ive never heard a combo like that, though, so who knows. Bipolar mosfet transistor driver microcontroller interfacing by lewis loflin the output of most digital circuits and microprocessors is only five volts at most a few milliamps. Offering products for twochannel stereo sound systems and multichannel home theaters with surround sound, mcintosh continues to define the ultimate home audio entertainment experience for discriminating listeners around the world.
The to3 output transistors where 2n5305 replaced by mcintosh for mj15003. I have to replace the transistors in a mc2300 driver boards. We sell parts and components for mcintosh hifi audio. I am trying to repair a mcintosh mc 2205 power ampi have narrowed it down to the power supply or meter pcbs behind the power metersdoes anybody know the 2n number on the transistors used and the opamp comparator number that is used on theses two boards thanks don aka hifidoctor p. These vacuum tubes provide excellent tone at a reasonable price and the most popular combination recommended by customer feedback. This could be used as a mass driver disable at any time at an incremental cost of one schottky diode per driver. While everyone has varying opinions on what is the most integral link in the audio chain. This website is not affiliated with or sponsored by mcintosh. The tracking potentiometers were updated as well as the initial differential pair transistors with matched ztx low signal transistors matched within. Free mcintosh diagrams, schematics, service manuals.
Scroll down for product registration and other helpful links. Please, after buying this item, check out my other items for other transformers from utc, western electric, triad, ampex, and many. If the driver boards have round, saucer looking heat sinks the amp has the updated predriver transistors, the mandatory upgrade we needed to do at. Service manuals, owners manuals, schematics, diagrams, datasheets, brochures online for free download and free to your amplifier, receiver, tape, cd, tuner, turntable and recorder. Mcintosh mc2300 rebuilt by amplifier experts youtube. Get all the newest and latest information on the new mcintosh sol id state equipment. Each output stage uses 6, 15 amp single diffused power transistors pro. Mcintosh vintage amplifiers and tube amps for sale ebay. My reading has me to believe that mcintosh lowered the filter cap specs.
Mcintosh mc2300 mc2300 power amplifier amp for audio sound. The mc352 is their 350 watt stereo power amplifier. Both firms specialize on repairing the tube era and first generation ss mcintosh equipment. Mcintosh mc2505 the solid state amplifier that change the world as any vinyl enthusiast will agree, the pure audio enjoyment of this hobby will only go as far as the limitations of your system.
Company in washington state service audio video home electronics. The mcintosh mc2301 300 watt vacuum tube amplifier delivers the most extraordinarily lifelike and dynamic performance ever heard from a mcintosh tube amplifier. The idea here is to do the same thing to a pair of mcintosh mc30 monoblocks as i did to the a pair of heathkit w5ms if you recall i took a pair of rusty heathkits and rebuilt them to better than new specifications using nothing but the best parts. Hi check if theres any dc or ac sitting on the chassis. Mcintosh mc2300 stereo power amplifier for sale canuck. Mcintosh 1700 receiver to66 driverstage pnp transistors. Mcintosh mc2300 vintage 300 watt stereo amplifier for sale. Darlington pairs are available as complete packages but you can make up your own from two transistors. With an output of 300 watts, it provides enough high power to drive even the most demanding loudspeaker. Select product category then model number to find manuals, software drivers and other support documents for current and discontinued models.
The 2032 is similar to a 2n3645 and according to my mcintosh info, is an approved replacement. Discussion in mcintosh audio started by whabamp, nov 28, 2014. One very good 300wattch mcintosh mc 2300 power amplifier. View and download mcintosh mc2300 service manual online. Nov 01, 2014 it is the only mcintosh receiver that has output that is similar to the amplifier you have now. Mcintosh mc2300 driver boards transistors diyaudio. Mcintosh mc30 rebuild first installment turret boards for.
The mclntosh mc 2300 solid state stereo power amplifier. Our builtin antivirus scanned this download and rated it as 100% safe. Here are the mcintosh part numbers q107q108 are 2021 q109q110 are 2032 q101q102q103q104 are 2032 drivers which i think are 2n5320 and 2n5322 q111q112 are 2038. Since counterfeit mj15003 exist these days, i figured id swapped these 3 as well as the other 9 with known genuine nos mj15003 that i had on hand. Unfollow mcintosh mc2300 to stop getting updates on your ebay feed. Mcintosh mc2300 stereo solid state power amplifier.
The sonic character of a worldclass amplifier like this one can be described as an iron fist in a velvet glove. Using pnp transistors to switch higher voltage loads. Whether this or some other scheme is worthwhile is tbd in each case. The mc2300 is a solidstate power amplifier which was built by the american highend audio company mcintosh, and sold between the years 1971 and 1980. View and download mcintosh mc2301 owners manual online. Get a mx 110 from either audio classics or terry dewick if possible since repairs are expensive otherwise. Hifi vintage mcintosh or rollsroyce high fidelity, amplifier mcintosh, mcintosh tube amp, amp mcintosh 275, hifiatubes, mcintosh amp, hi fi mcintosh, mcintosh, hifi mcintosh. A complete list of tubes is given for tube amplifiers. Part 8 showed how to use a pnp transistor allowing the load to be at ground potential, as is sometimes necessary. Pnp transistors for example, 2n3906, 2n2907, tip 125 pnp transistors work similarly to npn, but they are switched on by opening a path to ground on the base, and the load is put between the collector pin and ground. I dont use these very often, since it is easier to use an npn with an arduino output pin.
The maximum collector current icmax for the pair is the same as icmax for the second transistor. Discussion in audio hardware started by erikullvin. Mcintosh mc2300 power amplifier in very very good condition. Mcintosh mc2300, 2 x 300 watts,monster power amplifier. Mcintosh mc2300 rebuilt by amplifier experts amplifier experts. Reverb is a marketplace bringing together a widespanning community to buy, sell, and discuss all things music gear. Amp has been used in a home environment all its life so it shows rather well. Mcintosh mc2300 manual solid state stereo power amplifier.
One bank had obviously been repaired with mj15003 at some point. Mcintosh mc2505 the solid state amplifier that change the world. All of the output heat sinks were a total mess in both amps and it looked as if all soldering was done. Help me pick a preamp for mcintosh mc 2300 steve hoffman. Mr71 audio path upgrade using solen, pheonix, and iec capacitors, included in this upgrade is a full rf, if, and demultiplex alignment. This site helps you to save the earth from electronic waste. Power amplifiers are electrical devices that provide amplification and various effects to audio sounds. Cofounders frank mcintosh and gordon gow came into electronics from world war defense communications jobs and later operated a consulting firm in washington, d. Unfollow mcintosh amplifier to stop getting updates on your ebay feed. Make offer vintage original mcintosh mc2300 service manual. We sell parts and components for tv and vintage audio gears. Mcintosh the compendium vintagemacs mcintosh compendium has moved.
Founded in 1949, mcintosh is known for offering distinguished home audio systems that deliver the ultimate experience in music and film. The mc2500 uses a dual symmetric npnpnp driver topography and autoformers. One unit took me about 2 years but well worth the money and time. Mcintosh receiver vs separates steve hoffman music forums. I recently purchased a very large amount of transformers and other gear from a local recording studio that had been in business since the 1950s. Repair and upgrade examples mcintosh home audio for sale.
Newer and better power transistors rebuilt driver boards better power caps every circuit checked and newerbetter parts installed, including resistors, connectors and the use of shielded wiring where necessary too many to list. The mcintosh mc2000 raised a mighty splash when it cannonballed into sam telligs wading pool. Each piece is glued against the walls of the heavyduty box. View and download mcintosh c2300 service manual online. The fm multiplex section has had issues with aging and is hard to work on and mcintosh dont work on them. One of the pioneers of audio electronics, mcintosh laboratory got started with an idea. This is the culmination of months of restoration work. The easiest way to switch a higher power load than a microcontroller can handle is to use an npn transistor as explained in part 7. Some speaker designs have impedance characteristics that may dip to as low as 1. It can be utilized either as a 300wattperchannel stereo amp, or a 600watt monoblock, and was rated by its manufacturer as being able to produce this amount of power continuously, with very. Mcintosh usb audio driver free download windows version.
To purchase mc2300 spares or accessories, please contact the company via their website or visit an. Sadly the amplifier is in a nonworking condition with some parts missing, but. This amplifier needs no introduction and is priced for a quick sale. Mc 2300 filter caps audiokarma home audio stereo discussion. This is a premium retube set for the mcintosh mc2301 tube amp. The mclntosh mc 2300 is a high quality, extremely high power, solid state stereo amplifier. Free mcintosh misc diagrams, schematics, service manuals. Stereo mo no electrical specifications 4, 300 rms 8 or 16 600 rms ohms. Im using a mcintosh c33 with my mc2300 and it sounds great. Never connect or disconnect inputs or outputs while the amplifier is turned on. Because of the high power available it is necessary to emphasize some prudent and safe operating conditions.
Mcintosh misc diagrams, schematics and service manuals download for free. Mcintosh audio labs mc352 amplifier positive feedback. This is the first installment of the mcintosh mc30 rebuild. Because of the high power available it is necessary to emphasize some prudent and. Since 1949, mcintosh has remained true to its design aesthetic. Its been a while since ive had a classic amplifier in my system, and mcintosh laboratorys mc275 is as classic as they come. I have also heard people say that for the solid state amps like mine i should go tube on the preamp. Mcintosh mc2300 stereo solid state power amplifier reverb.
Mcintosh mc152 stereo power amplifier at crutchfield. The first transistor can be a low power type, but normally the second transistor will need to be high power. This auction is for a very rare and collectable vintage mcintosh mc2300 power amplifier. Mcintosh transistor pair 2070 motorola mc2300, etc. Jun 03, 2016 the mc2500 uses a dual symmetric npn pnp driver topography and autoformers. The tracking potentiometers were updated as well as the initial differential pair transistors with matched ztx low. Is the dual differential amplifier driver labeled the.
Mcintosh has been creating devices since 1949 with the goal of providing the amplifiers to withstand the test of time, especially in consideration of their vintage amps. This beast was the top of the line unit for mcintosh back in the day. Amp stopped working, after taking it apart i found it had a drink spilled in it, fryed a driver board and 3 output transisters and some resistors. My problem is, the transistors are nla, part number from mcintosh is 2070, number on the transistor is 32070, motorola. Mcintosh mc2300 amplifier for sale canuck audio mart.
Mcintosh was on the second floor of the old downtown building. Mcintosh mc2300 power amplifier stereo power amplifier effecter audio equipment. The mcintosh mi350 and mc3500 high power highfidelity tube audio amplifiers. Antique radio forums view topic mcintosh mc2105 output. If you are in need of designtechnical support, let us know and fill in the answer form, well get back to you shortly.
On these boards the original electrolytic were replaced with a audio grade nichicon kgka and uvp nichicon bp capacitors. Each channel uses 12 heavy duty motorola transistors mj type, 3 in a row on each heatsink and a bank of massive general electric power supply capacitors giving the 2300 enormous power reserves and almost idiotproof operation. I think that these boards are the same as many mc amps i know that the drivers. One amp was missing the meter driver board and one output driver board, the other amp was missing both driver boards. In sts detailed musings on this goldplated hunk o stereo amp in the november 99 stereophile, youll learn that the mc2000 was designed by sidney corderman, mcintosh cofounder and designer of the legendary mc275. Mcintosh c2300 vacuum tube preamplifier ken kessler. To purchase mc2300 spares or accessories, please contact the company via their website or visit an authorised retailer. Service manuals, schematics, eproms for electrical technicians.
Mcintosh diagrams, schematics and service manuals download for free. Im figuring if the mcintosh master says theyre good to go, than they are good to go. It can be utilized either as a 300wattperchannel stereo amp, or a 600watt monoblock, and was rated by its manufacturer as being able to produce this amount of power continuously, with very little less than 0. Mcintosh 1700 receiver to66 driver stage pnp transistors submitted by marantz123 on june 16th, 2014. We service and repair tv,s, monitors, audio amplifiers, modern and vintage, brands mcintosh, yamaha, kenwood, onkyo, krell, marantz,mark levinson, pioneer, luxman,panasonic, sony, and other. Mc2300 power amplifier 9 ftj m c 230 0 o p r e raige service information starting with serial no. Mcintosh c2300 preamplifier this new preamp from the venerable american audio company has an amazing list of features including eight inputs, a number of data and control ports, separate mm and mc phono stages and the ability to change cartridge loading via remote control. The mcintosh delivers air and space, with accurate proportions and, above all, correct scale. This free program is an intellectual property of mcintosh. The mclntosh mc 2300 is a high quality, ex tremely high power, solid state stereo ampli fier. Later, mcintosh used a mpsa05 2171 and mpsa55 2172 pair as replacements.