It provides a flexible complement to the apt holman pre amplifier, but it is meant to allow an optimum match, without detrimental interactions, to any other possible system components. Apt1, owners manual, english download pre amplifier, service manual. Jun 07, 2020 i owned both the apt holman preamp, purchased as a demo in 1977, and the apt one power amp, purchased new in 1980. A miscellaneous companies high quality service manuals user. I bought mine new in 1980, and was fighting one channel for the next twenty years on the preamp. Amplimos one stage amplifiers, amplificatori audio monostadio. That store sold more apt gear than any in the country, so tom holman came to visit for a whole day in 1977 to answer questions about the design and. I just inherited an aprt holman preamplifier and i was wondering if anyone had a pdf version of the user manual. High quality service manuals schematics repair user owner. Well ive listened to the apt holman preamp exclusively for about 3. Apt used the best quality speaker relays but 20 years of use and the.
Electrocompaniet aw70 with 2sc25652sa1095 electrocompanietaw. Apt holman power amplifier 1 vintage classic ss solid state. For more information on the apt holman preamp upgrades and repairs. Apt holman manuals, schematics and brochures hifi manuals. The biggest collection of apt holman manuals and schematics. Includes our original performance verification report and a copy of the owners manual. Fairchild model 240 vintage tube preamp preamplifier ebay. User manuals, guides and specifications for your marshall amplification vs100 amplifier. The two preamps i own are such minimalist designs and the ah preamp is the exact opposite in that regard. Apt holman preamplifier preamp, original owner, not a mark on. The apt holman preamplifier has been designed to provide a control center for home music systems which allows maximally flexible use of other equipment. Apt holman preamp expectations steve hoffman music forums.
Apt holman pre amplifier service manual download apt holman pre amplifier service manual docs various electronics service manuals file information. Tested except mc input dont have any mc cartridges. To get the lowest measured noise, i floated the signal generators unbalanced output from ground and ran a separate. If i recall correctly, the holman preamp was one of the few available. For logistical reasons, i tested a different sample serial number sphb9j0100 from that auditioned by michael fremer. In good working order, all the preamplifier most people ever need or ever will need. Almost all ss amps need to have their bias checked to verify proper operation.
I think holman was a pretty smart person and saw there really wasnt a big market for this type of product, with strange things like tone controls with variable profiles, lr switch for cartridge set up etc, so got out of enthusiast stereo products and into. Roland micro cube rx manuals and user guides, amplifier. Apt corporation power amplifier 1, holman designed. Luxman l550 integrated class a power amp with 2sc25262sa1076 luxmanl550integrated amplifier service manual. The holman preamp had some very nice features maatgo combines manual channel steering controls with a balance control and goniometer. Mikes manuals specializing in out of print service manuals call 6172543666. The apt holman preamplifier has been designed to provide a control center for home. Aug 28, 2015 the apt corporation holman preamplifier is one of the best stereo preamplifiers ever designed. Tom holman has many pages of specifications and how to measure them in the apt holman preamplifier service manual. View online service manual for apt holman amplifier or simply click download button to examine the apt holman guidelines offline on your desktop or laptop computer.
The amp had new output transistors installed five years ago. Comes with the copy of user manual and service manual not the. The classic apt holman preamp is accompanied by an exhaustive manual that is sometimes sold separately. Download the apt holman preamplifier manuals for free. Not a mark on it and all functions work as expected. It explains the thinking behind some really innovative design features of this unit, and tells how to use these features. Im old and my ears are shot so i wont argue modern preamp x sounds better with anyone, but i have two apt preamps and an amp still working without intervention since new. Apt holman service repair manuals, schematics, circuit diagrams, parts lists, troubleshooting, disassembly, service menu. I had it compared with sumo athena and counterpoint sa preamps once it surprisingly holds its own. I picked up a new to me hk citation 16a recently, and the owner great guy lent me an apt holman preamplifier for audition. Variable output impedance options, and bridgeable to mono, for maximum versatility. I replaced a parasound zphono running into an hk citation 17s preamp with the apt preamp. Apt holman preamplifier restoration recap repair service rebuild kit.
Apt holman preamplifier restoration recap repair service. Measurements i measured the ps audio stellar phono phono preamplifier using my audio precision sys2722 system see the january 2008 as we see it. Ps audio stellar phono phono preamplifier measurements. Apt corporation holman stereo pre amplifier manual hifi engine. I just bought an apt holman preamp on ebay, based on the units reputation of having a very good phono section.
The aptholman preamplifier has been designed to provide a control center for home music systems which allows maximally flexible use of other equipment. Click here for the apt5 service manual in pdf format manualzz. I have the user manual for the apt holman but have never scanned it. I bought a apt holman prepower combo in the us in 1980. Jan 06, 2021 why does the apt holman preamp sound so good. Apt holman amplifier service manual pdf viewdownload. Hi folks, recently purchased a holman pre amp and wondered where i could get the owners manual for it. As i mentioned to you in a followup call within days of receiving the w4s equipment, i have rediscovered music ive played many hundred times over in the past. Download your diagram, schematic or service manual for free. Detailed instruction with colorful images, schematics, manuals all of these are in electronic form, i consider these much better than printed version due to zoom. It has both extraordinary sound as well as mastercontrol utility and lab performance.
I agree with you that this preamp has many switches and other types of controls and that is an area of concern. The amp is rated very conservatively at 100 watts rms at 8 ohms. Jun 03, 2012 the preamp is the high maintenance bitcx. I have gone off the analog deep end with two tapedecks and a teac an 180 for barkly crocker tapes. Apt holman preamp sm service manual download, schematics. Would also like to get hold of the user manual as some of the function. The apt corporation holman preamplifier is one of the best stereo preamplifiers. I think it looks great, and it has all sorts of useful features and gadgets, but the sound left me a bit disappointed.
Accuphase, acoustic, acoustic research, acrosound, acurus. The store i bought them from was just across the street from the purdue campus. The auxiliary section of the apt holman is as excellent as any i have. We have 1 apt holman manual available for free pdf download. Apt holman preamplifier preamp, original owner, not a mark. I am the original owner of this since 1980 and it has performed flawlessly, yet has sat idle for the last 45 years. As long as it works very likely youll be pleased, and you certainly wont find a preamp of that quality for anywhere near that price. Download apt holman pre amplifier service manual docs. I have had the apt amp and preamp since they first came out, they are both going. The service manual functions as a repair guide for troubleshooting and sometimes contains tips for refurbishing and modifications. Apt holman preamplifier apt holman preamplifier service manual. The apt holman noise floor is noticeably lower and all my lps sound better. The apt holman preamplifier is the most well thoughtout stereo preamplifier ever designed. It was designed at the very height of recorded musics reign as the dominant form of home entertainment home video was still years away, and was designed by none other than the brilliant tom holman, the inventor of 5.
Also, the phono stage is really fine on it, for mm and mi cartridge fanatics or sutheadamp users. Includes our original performance verification report and a copy of the owners manual from the web. Apt holman preamp posted by klatu00 on october 10, 2004 at 14. Apart from having the volume pot replaced last year they are still going strong. If you are having trouble with the operation of the mute relay in the aptholman preamp, it is quite likely the c67 1 mf, 50 v andor the c66 10. Apt holman preamplifier for sale canuck audio mart. Now, it is not going to embarrass the more expensive preamps out there but it offers a sound quality that is comparable to these more expensive preamps. Its very slimmed down from the original apt holman preamp with only 4 inputs tuner, tape, aux, and phono and a tape monitor switch. About five or six years ago the preamp developed a similar problem to the one you are describing regarding the right channel intermittantly cutting out. Apt corporation holman stereo pre amplifier manual hifi. Id recommend you read this covertocover if youre interested, as it not only explains many of the novel circuit innovations, it even includes several sample projects to build in order to measure the excruciatingly high performance and low noise of this preamplifier. Jan 07, 2017 im somewhat biased, since i worked there for a l0ng time, but ill defend the apt holman preamp and the original amp to the death. Apt holman preamplifier two for sale us audio mart. The design is sound, so leave it alone, or build a new preamp based on the apt holman design.
Phono 1 has standard 47k50pf loading and phono 2 has user selectable resistance and capacitance loading. Apt holman preamp audiokarma home audio stereo discussion. Includes the very detailed owners manual, factory test and calibration sheet, and of course the schematic is right on the bottom of the unit. Marshall amplification vs100 manuals and user guides. Apt holman diagrams, schematics and service manuals download for free. A miscellaneous companies service manuals user manuals. We might reproduce the service manual which would elaborate on these. Aptholman preamp manual amplimos one stage amplifiers.
Download the apt holman preamplifier manuals for free hifi. However, it was the best at that time when it came out for what it was worth. Apthplman preamp user manual requests forum 201004. A a, tha of and 3 ilz rd cf wiifr ahe the near is qat with ail of 1. Apt corporation holman preamplifier preamp in very good condition. The apt 1 amplifier is a power amplifier for driving loudspeakers in a wide range of home music systems. User manuals, guides and specifications for your roland micro cube rx amplifier. Apt holman service manuals, schematics, circuit diagrams. I admired the logic and clarity of the ah manual, and the apparent build. As said below, the stock apt holman preamp accomodated mm carts. It has been used primarily as a backup preamp for whatever i am using as a main preamp. I have owned an apt holman preamp for the past 16 years. Apt holman service manual service manual 51 pages toa nx100. Jul 19, 2017 that said, the apt holman preamplifier is one of the best of its era.
This manual is very informative and extensive in its coverage and depth of information regarding unit operation, theory, etc. Find the user manual and the help you need for the products you own at manualsonline. The amp is both as straight forward and simple as the pre is complex. Apt holman preamplifier preamp vintage hifi stereo one owner cambridge mass. The apt corporations holman preamplifier is the most well thoughtout stereo preamplifier ever designed. Database contains 1 marshall amplification vs100 manuals available for free online viewing or downloading in pdf.
Apr 04, 2016 i picked up a new to me hk citation 16a recently, and the owner great guy lent me an apt holman preamplifier for audition. Apt holman power amplifier 1 vintage classic ss solid. Mikes manuals specializing in out of print service manuals order online or call 6172543666 tuner pre amplifier. View and download apt holman service manual online. Free apt holman diagrams, schematics, service manuals. Apt holman preamplifier, operational demo, june th. Apt holman preamp and amp steve hoffman music forums. Database contains 1 roland micro cube rx manuals available for free online viewing or downloading in pdf. Apt corporation apt 1 stereo power amplifier manual hifi engine.
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