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Guitar Identification Guide. Bass Identification Guide. Properly identifying Carvin guitar amplifiers can be much trickier than identifying Carvin guitars and basses. For starters, there is no serial number information currently available, from this site, or from Carvin directly. So, unfortunately, having a serial number is of no benefit in identifying the year of a particular amp. The best one can hope for is to narrow down a particular model to a range of years - but finding a specific year of a particular amp is just about impossible to do.
Altec used to remachine the top plates of early drivers for a wider gap. Jim Lansing understood the benefits of a narrow gap.
The voice coil air gap provides the vast majority of reluctance in a speaker magnetic circuit. As a gap is widened, the reluctance grows by the square of the distance across the gap.
Help me date my JBL DF-6 drivers
All other things being equal, a wider gap will result in lower flux density in the gap. Looking at it another way, a larger magnet would be required to provide the same flux density in the wider gap. Jim Lansing was able to accomplish this like few if any others of his era. Later on, service technicians must have been pulling their hair out trying to repair older drivers with repair parts having sloppier tolerances than the originals.
Their solution was to disassemble the driver, hog out the top plate for a wider gap, reassemble and recharge the magnet. Is it any wonder that collectors seek out the older drivers with original cones and diaphragms?
LE8T with double serial number This LE8T has double serial numbers following the familiar pattern of the higher serial number in the normal space on the foilcal with the lower number stamped in the space above the higher number. And the memo about remachining the gaps wider mentions the LE8 as possibly having a narrow gap requiring machining to allow a recone it does not mention the LE8T.
Mar 19, How are you? I am new here:) but was directed from the fender forum to ask my question in this forum. I have a couple of JBL DF guitar speakers that I would like to date but I would most like to know if these speakers are original or if they have been reconed. I bought them used in a Fender cabinet without the amp. It's a dual showman cabinet, 48 inches high. These speakers would be offered in only, then would return again in Although the "James Lansing" name has faded into history, the brand these speakers evolved into hasn't - JBL speakers, and Altec-Lansing (see sidebar). By , Carvin was offering an assortment of Lansing and Jensen speakers in a variety of speaker cabinets. Acoustic Fiber Sounde 67 Eminence Pioneer Admiral Esquire Pyle Altec Lansing Fisher Quam-Nichols Ampex General Electric Quincy Atlas Harman Kardon Radio Speaker Automatic Manufacturing Heath Raytheon 24 Becker Heppner RCA Bendix Hitachi ROLA Best .
Even if re-machining the gap was one reason it was done, that operation would only have to be done once so the existence of triple serial numbers would indicate some other reason to assign an additional serial number to a driver. Does anybody have an idea why the double serial numbers and sometimes triple are used? Some kind of warranted repair work done at the factory? DF with double serial numbers DF with double serial numbers, and in this case very close together?
QQcmdZViewItem serial numbers are an less than numbers apart.
Dating Jbl Speakers By Serial Number, rencontre homme timide, abeka american government in christian perspective on dating, a foreign affair dating site review. Back to countries. Titfuck. Urmila. athens escorts, Escorts, Escorts Santorini, Los Angeles escorts, Luxury Escorts Athens, New York Escorts, Vip Mykonos Escorts. Aug 10, After that the "number- letter-serial" system went into effect (2 August ). The first "number-letter-serial" speaker was produced on the 2nd of August ; that serial number was 1A In the serial method the first, or prefix "digit(s)" before the year letter represents the sequence of production for each units. Dating by Serial Number ate: The good news is that good progress is being made, but I am in fact, still desperate (if you could only see the pitiful look on my face right now) for more info, especially for tweed, brown, blonde and silverface amps. I have practically no information for some models like the Bassman and other "non-popular.
I would expect this means that the DF serial number left the factory, but only a short time later was returned to the factory for some mystery operation that involved removing the original foilcal on the back. Later replacing it with a new one bearing the number which would otherwise have gone to one of it's brothers rolling off the assembly line at the time of it's revisit.
Then the foilcal was hand stamped with the old number and left the factory to be returned to it's owner. I've already asked seller if he knows why it has double serial numbers, maybe one time I can catch one of these being sold by the original purchaser who just might know what's going on.
Dating Jbl Speakers By Serial Number, partnersuche ebensee, historia de navidad pelicula online dating, antique brass dating/ Welcome to City Girls! We are a private club of independent escorts with Dating Jbl Speakers By Serial Number a high standard of excellence in all that we do. Our VIP Members enjoy sensual entertainment within a veil of safety and discretion unparalleled in the adult world. A pair of vintage Fender JBL DF 12" guitar speakers. Designed specifically for Fender amps by JBL, the DF is considered to be one of the best guitar speakers ever produced. One of the speakers (serial #) appears to be all original, with the original cone. The lower serial number speaker appears to be a re-cone.
I'm going to keep adding to this thread until someone comes up with an explanation! Replies: 29 Last Post:AM. Replies: 27 Last Post:AM. Replies: 10 Last Post:PM.
Replies: 1 Last Post:PM. Production Numbers Yeah, the cone number is a pretty good indicator. If it has a "" stamp on the backside of the cone, chances are either it's original, or it was reconed VERY early in its life. Also, I have a pair of Ds here So, that can be a relative time indicator. Given how close your numbers are to mine, they HAVE to be probably within a year of the same age Regards, Gordon.
Resize them in your photo editor to X pixels. Originally Posted by horseshead. Attached Images.
Feb 28, Anybody know of any current information on dating JBL speakers from the early years up through about ? Cone number nomenclature, serial numbers, any links with ates or personal knowledge will do. Anybody know what model and what year Fender started utilizing the JBL script badge on the front grillecloth of JBL installed amplifiers. RussB. Nov 14, Unlike most other speaker manufacturers from that time era, JBL did not put a user friendly dating number on those speakers. They were encrypted. Generally, were made from the early 60s thru ' If you haven't found this cite, take a look mariechloepujol.com They are my favorite speakers just slightly ahead of Altec As. The product's serial number, if available. The format will look something like this: ABCD; After we receive your reply, a Customer Service agent will contact you within hours. Note: the Warranty Card provided with your JBL product contains the full terms and conditions of your warranty.
You'll have to give me a few hours. Right now I only have pictures of the back of the speakers. Also, I have to go to work and come home first. Alright, first three pictures are of the top df.
JBL speakers with changed serial numbers
The last three pictures are of the bottom df. By the quality of the pictures are you guys able to tell whether or not they are originals or recones?
Without date codes from transformers, pots and/or speakers, it's not possible to predict amp dates by serial number. Eventually, the hope is to have enough info for a more detailed breakdown on the B series, A+6 digit and F+6 digit series. For now, the dating schemes for these series are: A6 + 5-digits - A7 + 5-digits - There are 2 acceptable methods of displaying the EIA date code, with or without a hyphen between the manufacture code and the year/week code. Some manufacturers also attached other letters to the end of the date code to indicate day of the week, work shift, serial number, lot number, etc. The EIA only specifies manufacturer and year/week code. You are completely right and your findings Dating+jbl+speakers+by+serial+number are actually supported by scientific research if you Dating+jbl+speakers+by+serial+number want Dating+jbl+speakers+by+serial+number to look into it further. An average looking middle of the road type of guy is simply not going to get much sex unless you really put some thought into it.
I picked what I thought were the clearest pictures but I have others if these are not good enough. Thank you, I've been wondering how to get "that sound" for the better part of 30 years until my favorite guitarist tipped me off on the famous d, saying that he prefers the 12's d's. So, I couldn't afford them right away and wound up with a rebuilt pair.
The last three pictures didn't attach so I'll attach them now. Again they are the other d which is on the bottom portion of my cabinet.
Dating jbl speakers by serial number
There looks like their might have been or is some liquid damage on the d at the bottom of the cabinet. D late 50's Here is a D removed from a late 50's guitar amp. From my experience I believe it has the original cone.
Notice the "Jim Lansing" designation. Referring back to an earlier discussion of Fender amps equipped with JBL's, they had an "F'' suffix attached. I would date your D'S from '61 until the introduction of the next series E?
I can see that it looks like JBL used a single "ring" cone kit which was rated only 25 or 30 watts although easily capable of handling
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