The p300 can coast through all of these requirements without strain due to its large, heavyduty power transformer and 2 x 40,000 microfarad filter capacitors, its allstage, pushpull circuit configuration, and well selected and thoroughly tested parts. Accuphase p 300 service manual andor schematic wanted. Accuphase p4500 power amplifier soundline audio online nz. The p300 can coast through all of these requirements without strain due to its large, heavyduty power transformer and 2 x 40,000 gf filter capacitors, its allstage, pushpull circuit configuration, and well selected and thoroughly tested parts. Have you found and downloaded a copy of the service manual. This e202 was also one of their very first products and is not something youll see very often in the wild. Vintage stereo accuphase p300 vintage hifi accuphase p300. The accuphase p300 power amplifier accuphase made the p300 from 1973 to 1976. This basic circuit defined hifidelity for around 20 years. Accuphase c200 sm service manual download, schematics. Stereo power amplifer with outstanding performance since it started from p300 in 1973, during the past half century, the history of accuphase power amplifiers is continually evolving with a wide range of variations as monophonic, classa and classab.
Amplimos one stage amplifiers, amplificatori audio monostadio. This new model is a direct descendant of the first p300, not only acting as a strong. Accuphase p300x is a stereo power amplifier which can deliver ample power of. I have one that is fully functional, but the mix of transistors used looks a bit odd to me. Mos fet is used for a drive stage and the broadband transistor. This e202 was also one of their very first products and is not something youll. The p 300 can coast through all of these requirements without strain due to its large, heavyduty power transformer and 2 x 40,000 microfarad filter capacitors, its allstage, pushpull circuit configuration, and well selected and thoroughly tested parts.
Accuphase p300 power amplifier ac100v d631 for sale online ebay. Stereo power amplifier which supplied the technology of accuphase tradition and was developed towards an audio new time. The accuphase f5 is a high quality electronic frequency dividing network which accurately divides the audio spectrum of a program source prior to amplification and permits multi channel amplification to drive directly multiway speaker sys terns. Please click here to check out our newly launched skyfi audio website with additional items for sale freshly serviced and working right up to original specs, this highend japanese brand is unc. I did find some destroyed output transistors on one side and replaced them, but i.
The p300l can be thus driven at a low impedance providing an out standing output. Part of kensonics bestselling components, those which allowed that little brand to remain the last standing on its own feet nearly fourty years after the fact. Prepare to enjoy exciting music with the accuphase p 300 which can deliver it. Freshly serviced and working right up to original specs, this highend japanese brand is uncommon in the us, so if youre not familiar weve posted details below to bring you up to speed. Rapid changes in the music signal and occasionally, an instantaneous signal to the pulse of the response to the significant power to try and collectors loss pc150w the output stage transistors in parallel to the pushpull 6, a total of 12 units ch, breakdown them. Accuphase e202 integrated amplifier with meters wow. The p4500 is the succession model of p4200 launched in 20. The accuphase power amplifier p 102 is the ideal performer for the age of high quality program sources. Accuphase p 300 with 2sc10792sa679 accuphasep300poweramplifierschematic. Used accuphase p300 stereo power amplifiers for sale hifishark. Williamson developed the first push pull tube amp with negative feedback in 1947. Employing the latest bipolar transistors which have superior high frequency.
It has made the name accuphase so famous and where it started with all. Complementary symmetry circuit output stage of each channel. P300v stereo power amplifier assembly circuit diagram. The circuit diagram below shows the accuphase p300v stereo power amplifier, an all stage pushpull circuit configuration that forms the base of the amplifier p300v stereo power amplifier unit assemblies both pnp and npn power transistors with 10 parallel pushpull circuits, mosfet cascode drive.
At the time of an abrupt increase, the lamp of a power meter blinks and abnormalities are told. Mos fet is used for a drive stage and the broadband transistor is used for an output. He hired some engineers from other prominent brands marantz, luxman and. Sit static induction transistor amplifier with tokin tks45f323 by kamijo. Continuous average output power 20 20,000 hzstereo operation 400 watts per channel into 1 ohm both channels driven 300 watts per channel into 2 ohms150 watts per channel into 4 ohms75 watts p. Great deals on amplifier transistors for accuphase.
Accutech replaced all the power transistors, several capacitors, a display lamp, and one meter magnet. Thereby, all the electric power capacities were set to 4. Details about 8 adapter fisher mcintosh eico amp banana plug spade accuphase e202 p300 amp. Bipolar power transistors designed for audio applications. Despite the pionner carrying a much higher power rating 250 wc vs. Stereo power amplifier which supplied stateoftheart technology and gave the extensive improvement based on p 300 and p 300s. Ten parallel pushpull output stages outputting 180 w for both.
Accuphase p300 40000uf 80wv main filter capacitors original nichicon. A good power amplifier must also have the range to reproduce precisely the. Accuphase c3850 preamplifier and p7300 power amplifier. If a cord shortcircuits henceforth output terminal, abnormalities occur to a speaker or abnormalities arise by p 300 core, the protection circuit intercepted by relay will be adopted. Accuphase p300l manual stereo power amplifier hifi. My sister 300 watt sit super circlotron integrated amplifier. My p300 was completely refurbished by an excellent technician new caps, some new transistors and some general maintenance. Its a great time to upgrade your home theater system with the largest selection at. Accuphase vintage c200p300 prepower amplifier need not further introduction. Accuphase p300 manual dual channel power amplifier. The p 800, which was developed with accuphase s technology that has already produced a superb monophonic amplifier, m, is an exceptional power amplifier in this. The output stage constitutes the broadband bipolar transistor of pccollector loss200w from a 12 parallel push pull a total of 24 output transistors. Gold plated banana plug spade fork for mcintosh fisher eico adapter supplies set.
Bringing together the best of accuphase technology and sonic expertise, the p7300 stands out. Complementarysymmetry, pushpull circuitry, a consistent practice with accuphase since the widely successful p 300, is used in all stages, but the p 300x also introduces a newly developed cascode bootstrap. Get the accuphase p300 running again audiokarma home audio. Accuphase p 300 power amplifier repairs and restoration s. P300s september 1977, p300x june 1980, p300l june 1984, p300v july 1987. Im looking for a service manual for the legendary accuphase p400 or at least a good resolution readable schamatic. The accuphase p400 is a highest grade stereo power amplifier. Six heavyduty power transistors are used in the directcoupled. To fulfill these demands, the p 350 employs multiemitter type power transistors specially developed for highpower audio applications. This is the first audiophile matching prepower models produced by accuphase known as kensonicaccuphase those days. Pushp ten parallel pushpull power stages guarantee 180 wch as stereo amp, and the first models introduced by accuphase in august 1973 after the foundng of the company were the power amplifier p300 and the preamplifier c200. Accuphase manuals, schematics and brochures hifi manuals. Licensed to youtube by wmg on behalf of east west records uk ltd.
These sophisticated devices have excellent frequency response, and oustanding forward current transfer ratio linearity as well as switch ing characteristics. The biggest collection of accuphase manuals and schematics. Kasuga was not happy with the views of kenwood relating to the follower of their highend supreme 1 unit 1967. Accuphase c200p300 pre and power amplifier used price. Complementarysymmetry circuit output stage of each channel. The accuphase p300 is a first generation super amp. Share download accuphaset101 service manual free download. P4200, p6100, a36 and a46 uses opamps, discrete is so much better and all this amps will have it i think in the next upgrade.
Your task is to find any owner of any accuphase amp that gets fatigue post hz. The circuit is constituted from all the traditional magnification stage push pulls of an accuphase, and has improved many characteristics of an openloop to a limit. The longrun selling series of accuphase stereo power amplifiers. Theres no general rule of thumb on that, but particular to accuphase p300 many folks, owners would not suggest any upgrades and keep it as original as possible matching all values replaced circuit elements. Accuphase p 300x is a stereo power amplifier which can deliver ample power of 150wch into 8 ohms. Since it started from p300 in 1973, during the past half century, the. The p300l can be combined with not only the c200l stereo control center but. Heat equivalent to about 300 watts is generated normally during classa operation so a ventilation fan is provided for its dissipation to. The p 300 can coast through all of these requirements without strain due to its large, heavyduty power transformer and 2 x 40,000 gf filter capacitors, its allstage, pushpull circuit configuration, and well selected and thoroughly tested parts. The p300 was the first power amplifier from accuphase and part of the c200. View all accuphase amplifiers, preamplifiers, and integrated amplifiers from axiss audio. The p300 can coast through all of these requirements without strain due to its. Mos fet driver circuitry, and output circuitry free from crossover distortion to maintain excellent sound quality of low listening level. Accuphase started to use discrete input instrumentation amplifier in a200.
1268 822 40 760 196 1259 1039 111 1171 1512 1177 1376 1542 873 1099 1026 1049 1285 619 859 1 1335 343 1540 1092 36 412 318 740 1504 703 1044 657 675 711 1238 1161 660 220 1139 1261 1099 724