Both woofers were sourced to be the correct AlNiCo magnet versions, with the ‘damping ring’ as the original pair had too many issues we repeatedly found with our AF Gen Sweep processes. The original surrounds on AR-3a woofers were typically ‘distorted’, so we sent these to our local, ‘been in business 40 years’ speaker shop for fresh surrounds. The ‘spiders’ were also slightly ‘deformed’ we didn’t notice this as it is a rare condition on most speakers, was hard to see, but would show up at 3 different frequencies on an AF generator sweep, but most noticeable centered at 80Hz , so he ‘painstakingly’ replaced them, while retaining the original VC’s and Cones retaining the original Voice Coils and Cones made the process logarithmically more difficult. We have completely tested all drivers. All drivers were removed and tested individually. Attenuators removed and ‘burnished’ for ‘intermittent-free’ performance. Felt feet were installed to the bottom plates. Cosmetically, the grills were cleaned, and the original ‘hot glue attachment’ replaced with Velcro. We also added a ‘pull tab’ to facilitate removal.
Guitar Player Magazine Backissues
The source-date code on a pot is a 6 or 7 digit code impressed into the casing of the potentiometer. For speakers this code can be 5, 6, 7 or 8 digits long, and it’s ink-stamped or paint-stamped on the “bell housing” of the speaker. In either case, the code works the same. The first 3 digits on a pot, or the first 2, 3 or 4 digits on a speaker are the source or manufacturer code.
The remaining 3 or 4 digits are the date code.
Hi! I’m very glad to find your site. I’m a musician, and a recordist. I have two of the Presto Type A pre-amplifiers (with parts missing) that I’m looking at restoring.
Please don’t ask if we know any other speakers than mentioned on this page. When you know the best, you’re not interested in the rest. No, we don’t know if your Speakers match your Amp, but we can tell you how to tell if they are below. The more amps we try on our Tannoy Golds, the wider our opinion can be. The fact is there really is no way to tell beyond actually trying the Amp with the Speaker.
We’ve not got bigger speakers of the post design, if we use some small ones to test, they hardly give a full picture of the sound if do prove compatibility to our amps with modern speakers. Inifinite Baffle sealed speakers are best for Bass, the Ported Type usually just let the large cone movements out as Wind instead of supposedly being Tuned via a Port to improve bass. Omnidirectional Speakers just blur the sound around the room losing any sense of Stereo. So many lousy ideas in speakers Buying a Speaker is the most hard of all hifi items to buy due to the huge tonal differences and how they interact with the room you use as well as the amplifier.
Phase errors will create a poor sound as well as the minute volume differences. The Human Ear cannot supposedly hear these differences, yet some state we need Amplifiers delivering “sound” beyond 20 kHz to have music sounding right. A speaker in a room sounds less upfront than having two small desktop speakers on the Computer inches away.
Notes on the Troubleshooting and Repair of Audio Equipment and Other Miscellaneous Stuff
The following description applies to most cassette and open reel tape transports including those used in portable and microcassette recorders, Walkmen, and telephone answering machines. Looking at the top of the deck such that the tape heads are at the bottom: Supply reel table – left hand side platform on which the supply tape reel sits. Edge which contacts idler tire if used should be cleaned.
Camping Norcenni Girasole Club. Deze middelgrote familiecamping heeft een mooi zwembad met apart kinderbad, een tennisbaan, een internetcorner, een prachtig wellness centrum en diverse sportieve mogelijkheden, als zwemmen, fietsen en wandelen.
This information original was found on The Unofficial Ampeg Page http: I pulled this information from Google’s cache of the site. It has a note at the top of the page that they were reprinting with permission from the authors of Ampeg: If anyone feels this page should be taken down, please feel free to contact me. Ampegs can be divided into six distinct groups for dating purposes: Each group uses a unique serialization scheme that can be used to assist in dating the amps, but in many cases, it is the features and characteristics of the amps that determine the year of manufacture.
Electronic Industries Association EIA codes can also be very useful for giving clues as to an amp’s age. These codes can be found on speakers, transformers, pots, capacitors, and multi-section electrolytic “can” caps. Of course, these codes are only applicable to original components, not replacement parts. Ampeg amplifiers, especially the high-powered amps such as the SVT and V-series, contain lethal voltages even when unplugged and turned off. Therefore, do not poke around in your old Ampeg if you are unfamiliar with amplifier electronics or their operation.
A brief summary of the EIA system follows.
Above, the Presto Model A, their top-of-the-line system circa There is a detailed history of the Presto Corp provided at this website, so no need to re-tread those waters. Basically, what Presto offered was a way to make good-sounding LP and 78 recordings that could be played back instantly on any home turntable. Unlike earlier commercial recording technologies, there was no intermediate submaster required. Presto was able to do this by having designed an aluminum later, glass disc that was coated with a special cellulose-based compound featuring 51 ingredients!
At right, the Presto A Electronics package.
NETGEAR Arlo Wireless Indoor/Outdoor Security System with 2 p Cameras – White: Help safeguard your home under the watchful eye of the Netgear Arlo smart home security system. Suitable indoors and out, it features 2 weatherproof, wire-free cameras that record super-clear HD footage you can access from virtually anywhere thanks to a free app on your smartphone or s:
Download This page contains information about installing the latest Midiman driver downloads using the Midiman. Midiman oxygen 8 driver vista then launch the mac. On HAX tech forever. Midiman oxygen 8 driver vista. Windows All versions, Ubuntu. Automatic scan and update your PC drivers. Windows 7 default driver may take a long time ATI Catalyst 9. These include the following: Open GL is not supported under Windows 7 – 64 bit editions.
Nvidia GeForce Display Driver It is highly recommended to always use the most recent driver version available. Do not forget to check with our site as often as possible in order to stay updated on the latest drivers, software and games.
I’ve seen a number of books that begin with one definition. At least it didn’t involve turning lots of pages. Evidently, influir is in there because it occurs in the definition of influjo.
GAS Stereo-Vib (tweed): 2x18W 4×8″ and 1×12″ Guitar Combo with Stereo Vibrato Speakers: 4×8″ & 1×12″ (Jensens) Inputs: 2 stereo, 2 mono Channels: 2 Volume Controls: 2.
Return to the Main Index. Sometimes there just isn’t enough information on electric instruments and amps to allow them to be properely dated. And many people ask me to try and determine the year of their old amplifier, or to help them with the year of their older off-brand electric guitar. Since I primarily collect amps by Fender, and guitars by Gibson, Fender, Martin, National, Epiphone, Gretsch and Rickenbacker, I really can’t help them with these other less popular brands.
As you have probably noticed, there is plenty of information here to help date the brands that I am interested in. But where does that leave everyone else? Well I’m not one to leave you out in the informational cold, so here’s something that I use quite often in dating amplifiers and electric guitars. It’s called the “source-date code”, and it can help determine the approximate age of an electric instrument by the date its components were manufactured.
Source-Date Codes On American made vintage gear, the pots and speakers provide an excellent opportunity to date a piece of equipment by referencing their “source-date code”.
Notes on the Troubleshooting and Repair of Audio Equipment and Other Miscellaneous Stuff
Used in multi-driver speaker systems , the crossover is an assembly of filters that separate the input signal into different frequency ranges i. Hence the drivers receive power only at their operating frequency the sound frequency range they were designed for , thereby reducing distortion in the drivers and interference between them.
The ideal characteristics of a crossover may include perfect out-of-band attenuation at the output of each filter, no amplitude variation “ripple” within each passband, no phase delay between overlapping frequency bands, to name just a few. Crossovers can be passive or active.
Bizrate makes comparison shopping easy with Product Reviews, Merchant Ratings, Deal Alerts & Coupons. Compare Prices & Read Reviews on Top Brands & Products in Home & Garden, Clothing & Accessories, Sports & Outdoors, Electronics & More!
About the size of a Fender Twin, it has the classic tweed look of late s Gibson amplifiers. The only effect that the amp features is tremolo, but this is to be expected since the design predates the age of combo amps with on-board reverb The Gibson catalog claims true vibrato pitch modulation for this amp, but after listening to the true vibrato Magnatone amps, the Gibson sounds like it has tremolo volume modulation very similar to that used on brown Tolex Fenders i.
They play an important role in the unique sound of this amp which we’ll get to in a moment. First, let’s go over the tube compliment. Every true stereo amp has two separate power amps. As such, they have more tubes, an additional output transformer, and sometimes an extra power supply compared to a standard mono amp. These tubes are readily available and not too expensive. The amp is good for about 17 watts per side stereo or 35 watts mono.
Efficiently impact customer behavior
Not open for further replies. Massachussetts Hi folks, I’ve had these speakers since I purchased them new in I had cabinets made according to plans that I got at the time and I’ve been really happy with them ever since. One thing I could never determine is exactly what the crossover does.
DATING FENDER TRANSFORMERS, SPEAKERS & POTENTIOMETERS USING EIA CODES EIA (Electronics Industry Association) Source-Date Codes: Electronic components such as transformers, potentiometers, speakers, and some capacitors are often stamped with a date code, which indicates the manufacturer and the manufacturing date. The code follows the format: XXXYYZZ, where.
Guitar Player December Letters to the editor; Guitaring; Questions; It’s New. VG condition, mailing label on back. VG condition, mail label back cover.. A Pro replies; Rusty Young: Steel symposium; Chuck Rainey: More sonic shapes; Bob Baxter: Constructing chords; Jerry Hahn: Rhythm changes; Jimmy Stewart: Transcribing from LP’s; Happy Traum: Steel symposium; Jerry Hahn:
The African Union | Economy of Africa
It is beautiful listed as B1 looks perfect to me. Thanks for an excellent buying experience. MN Hey I wanted to take a moment to thank everyone involved for this great deck.
(Click here for bottom) J SI-approved standard symbol and abbreviation for the SI-approved energy unit — joule.A joule is inch-pounds, in universal American units. In the boring system, a joule is a newton meter. In terms of the earlier boring system, a joule would have been 10 7 erg. Because metric units ignored Thomas Jefferson’s (and others’) wise suggestion and were not selected to.
Per manufacturing regulations, the makers of electronics must include a minimum amount of production date information on their products. Depending on when the speakers were made this information may simply include a year and week or may be more specific, down to the day or hour. Disconnect the speakers from the power supply and connections before proceeding. If the speakers are in a vehicle, disconnect the negative terminal of the car battery before removing any speakers.
Carefully turn the speakers around so that the back of the speaker is facing you. Inspect the back of the speaker for a sticker that has digits or letters on it. If you do not see a sticker look for engraved numbers on the back surface of the speaker or turn the speaker over and inspect for numbers. Find the manufacturer date code. The first three digits indicate the maker of the speakers.
The number indicates Altec Lansing and represents Harman Kardon. Look at the remaining digits. The first two digits after the manufacturer three digit code indicate the year. Speakers made before the s only have one digit representing the year which is misleading.
UDPATED (4): Presto Recording Corp: Pioneers of ‘Instant’ Analog Disc Recording
The AR was in use as early as , mainly in commercial shipboard radio rooms. The receiver circuit uses one RF amplifier, a regenerative detector and two stages of AF amplification. Tuning is from 15 KC to KC in four bands.
General Feedback: Just received my first McIntosh component an MHA It is beautiful listed as B1 looks perfect to me. Thanks for an excellent buying experience. A.J. MN Hey I wanted to take a moment to thank everyone involved for this great deck.
This review page is supported in part by the sponsor whose ad is displayed above Owner: Metronome CD2V signature, Ack! James Burgess 45 Speakers: And the object of his collection is vintage audio gear. Gerry runs ads in the local papers’ “vintage audio equipment wanted”, he checks out the Penny Saver, the classifieds, garage, estate and yard sales and of course the grand electronic marketplace that knows no geography – eBay.
And like any good hunter, Gerry has a few stories about bagging that rare beast in the wild. Near extinct species in generic speaker cabinets, stuffed into closets. A sole power cord dangling tail-like, the only hint of something precious promising perhaps the elusive field coil lurking within. The thrill of the hunt. But instead of stuffing his captured prey, Gerry listens to them. And like any good collector, Gerry is also a seller.