Color artwork of the Grebe MU-1 from the advertising brochure For decades, vintage radio collectors have rated the Grebe Synchrophase MU-1 as one of the best, if not “the best,” Battery-operated TRF-Neutrodyne radio receiver from the mid s, with performance that is matched with timeless styling. However, anyone that has taken a close look at more than a few Grebe Synchrophase MU-1 receivers has surely noted that there are some significant differences between the various MU-1 receivers produced. This article will attempt to catalog as many upgrades as possible with explanations as to their purpose. This article will also assign a chronological order to the upgrades so the Synchrophase owner might be able to date when his radio was built from certain easily observable construction details. Also, we will attempt to decipher Grebe’s serial letter methods so that dating by this combination of letters may become possible in the future this attempt has actually produced another interesting possibility for the serial letter codes. A serial letter log has been started and this article will keep track of the information in that log.
There is no reliable way to date amps other than to ask Fender customer support to look up the date from the serial number, although you may find a date code on the speaker. Early Tweeds The early green board tweed-covered amps were not lacquered. Once again, only the speaker is different. It is not old stock. It has the same cream board inside with the same components as every other current-production Blues Junior.
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.
The tube charts are not very useful for determining the circuit model. At the Fender factory they used old tube charts when new models came, probably because the tube layout was the same. Determining production date by serial number and transformer codes is better, and you should also inspect the circuit to be completly sure. The picture below shows a transition model amp. Amp collectors and idealists often prefer the pre-CBS models but if we study the AB circuit it does have something very interesting for guitar players who enjoy cranked Fender blackface tones.
The AA is very rare and its circuit and tone is quite similar to the AA We will further focus mostly on the AB vs AA
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.
Fender Tube amp codes: – (look for a 2 letter code stamped on the tube chart inside the back of the amp)- the first letter is the year, and the second letter is the amp stamped NA would have been made in Jan. of Here is a list of the first letter showing the year of manufacture.
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.
In 3 digit dates code, the 1st digit is the last digit of the year. On 4 digits date codes, the 1st and 2nd digits are the last two digits of the year. In either case, the remaining 2 digits are the week of manufacture 01 to With this in mind, remember if the last two digits of the source-date code are greater than 52, you’re not looking at the source-date code! Also it’s worth mentioning: On 3 digit date codes, you have to “guess” the decade of the pot or speaker.
Usually this isn’t too difficult. Examples of Source-Date Codes. With all this information in mind, can you identify the following manufacturer and date of these source-date codes?
Update firmware pentru Tableta Aria
Even after all of this time, modern technology is helping us discover previously unknown “hidden” images concealed in the art. Using art restoration techniques, imaging technology, and even microscopes, art historians have been able to uncover some shocking secrets. People love finding hidden symbols and secret codes in all sorts of objects – including art. It might be common knowledge that Da Vinci was an accomplished musician, but not many people know about the song he painted into “The Last Supper,” using rolls and hands in the place of music notes.
And you’ve probably seen the “Mona Lisa,” but not with a microscope – she has a miniscule code hidden in her eyes.
This page displays radios for sale at Ben Martin’s Radio Library.
No other communications receiver, even those that are better performers, has such a dedicated following. Certainly, the SX ‘s top performance that combines great audio with an impressive appearance is responsible for the enthusiasm of its fans. Serial number analysis and a serial number log along with a chronological listing of Engineering Upgrades provides tools for accurately dating your receiver.
Today, hundreds and hundreds of SX receivers have been restored and are in use in Vintage Ham Shacks around the country still providing great performance with incredible, bass-rich audio. The SX remains one of the most popular of the “pre-war masterpieces. The receiver’s ultimate design was the result of the analysis of more than requested reports, including input from government engineers.
Twelve Hallicrafters’ engineers were assigned the project of creating a receiver that not only satisfied government and commercial users but also gave the hams a receiver that performed better than any previous Hallicrafters. Additionally, the SX ‘s modern, styling was to compliment the receiver’s great performance. The circuit utilized 15 tubes in a double preselection front-end on the top four bands and single preselection on the lower two bands. The frequency coverage was. The SX would become an all-time ham favorite, famous for incredible audio coupled with amazing sensitivity, stability and selectivity – all at a reasonable selling price.
Shown to the left and below are pages two, three and four of the multi-page advertisement in July QST that announced the SX Page one of the ad states that the SX was “, Typical of a new product advertisement, conceptual artwork is used rather than actual photographs.
Share this article Share Scheduled to be completed by , the current robot is 4. In tests, the small shape-changing robot pictured folded itself into a functional machine that could walk and turn without human help. But unlike the popular Transformers toys – robots that disguise themselves as cars and trucks – the device is not aimed at children but rather for other applications like search and rescue operations.
General Electric. FM MOBILE RADIO HISTORY. Part One, – Introduction; Prewar Equipment. General Electric was an already well established manufacturer of a broad spectrum of electrical and electronic material when it decided to enter the land mobile (police) radio market in
Il est impossible de faire une recherche en fonction des animaux de compagnie. The habits should mention the alcohol as is the case on AdoptAGuy. It is impossible to do a search based on the pets. It is no longer possible to search by region, the search distance can be set but the evaluation of the distances is buggy. I think that the search function on the place of residence should support filtering by region and distance as both can be useful and both are supported by AdoptAGuy.
The events page shows the next event organized by Meetic to which you are invited, you may see the next one by clicking on the button at the top right. Know that you have access to only a subset of available events near you based on your profile. I explain in more detail how it goes here. As for me, this is certainly the most useless part of this dating website.
It displays the main photo of each member in the right panel, it allows you to easily scroll through the profiles and it offers 2 choices to rank the profiles into three categories: The profiles of each category can be displayed in the right panel by clicking on the left, it allows to view the complete profiles and therefore not just the pictures. The booster increases the visibility of the profile during 2 hours.
Get daily updates directly to your inbox Subscribe Thank you for subscribingSee our privacy notice Could not subscribe, try again laterInvalid Email Cambridge saw a significant increase in the average salary during , and has now been named the best-paid place in the UK outside of London. The good news doesn’t end there, as the research by Adzuna found that Cambridge salaries are rising at a faster rate than in the capital, with a 3.
Unsurprisingly, Cambridge has also had the highest increase within the surrounding regions, with the 3. The data presented by Adzuna was collected from 56 major towns and cities across the UK between December and December When it comes to job vacancies, it should be no surprise that London was ahead of the pack – by over , roles.
SX Chassis H The photo right is H, a mid production SX, showing the typical chassis layout. Of note is the power transformer which has the standard Hallicrafters’ “h” embossed on the cover.
These directories are for years, to Operating instructions, schematics and servicing. It has 23 pages of tube set-ups for the Dyna-Jet Instructions with Tube Chart for setting up a tube test. Original, in very good condition. Very good condition, Previous owner did write his name on the cover but found no other markings inside or out. Large paperback book with pages.
See Article History Alternative Title: The telephone is inexpensive, is simple to operate, and offers its users an immediate, personal type of communication that cannot be obtained through any other medium. As a result, it has become the most widely used telecommunications device in the world.
DATING FENDER AMPS BY SERIAL NUMBER, PART VI by Greg Gagliano. Copyright , Vintage Guitar Magazine This article updates information from research started in
Part One, – Introduction; Prewar Equipment General Electric was an already well established manufacturer of a broad spectrum of electrical and electronic material when it decided to enter the land mobile police radio market in GE’s initial land mobile radio products were mobile and motorcycle receivers for the AM medium frequency police channels in the and KHz bands, and in the early ‘s the company branched out with an experimental VHF AM two way set, using a super-regenerative receiver, but which was more or less a toy rather than a serious police tool.
Inevitably, there will be “holes” in data coverage in any project like this, and I do not have enough information, manuals or examples of equipment to make this page an absolutely complete reference. For example, I do not have photos or detailed descriptions of the motorcycle and mobile equipment made by GE prior to , other than that below, so while mentioned here, it is not covered in any detail. Equally unfortunate is that I have little information on GE’s line of medium frequency and VHF AM equipment built prior to , hence it is not covered here other than the 2-way item directly below.
This equipment was built and designed at the GE Schenectady plant. The base station transmitter was a 1. From until the end of the ‘s, GE produced a 2-way mobile radio which was, depending on the year, a variation of the original 4GB1 transmitter shown below. This was GE’s last AM VHF two-way police radio, as far as I have been able to determine, and the outbreak of war in probably ended production of this model, which was quite obsolete by that time.
Chinese names starting with Xi like Xiaomi or Xinjiang. In abbreviations, it can represent “trans-” e. XL for extra large, XOR for exclusive-or. Dierckx, Hendrickx, Koninckx, Sterckx, Vranckx. Usage in Danish and Finnish is similar while Swedish , on the other hand, makes frequent use of ‘x’ in native words as well as in loanwords.
Hartford Steam Boiler (HSB) is an industry leader in the inspection of boilers, pressure vessels and other types of equipment. HSB provides many types of inspection services for equipment and property, meeting the needs of individual clients and property-casualty insurance companies.
The progress of this type of work is slow, hence the long hiatus, however, a lot of new data have been collected regarding Fender amplifiers, including production numbers. Advances have been made with regards to the production of tolex amps and it appears that much of this information can be applied to late s tweed amps as well.
In addition, the dating-by-serial number tables have been revised and are more accurate. The bad news is that there is still a lot of work that needs to be done on the silverface amps. Unfortunately, there is some sad news to report as well. Fellow Fender amp researcher, Greg Huntington, passed away June 5, after losing his battle with cancer.
Greg kept his illness very private, even from this author. His passing is a great loss to this research team and the Fender amp aficionado community in general. Greg was passionate about Fender amps and his knowledge, insight and humor will be missed very much. Paul Linden has volunteered to fill in for Greg. Paul worked with Greg on their small box brown Twin myth busting research and is extremely knowledgeable about Fender amps in general with a specialization in the brown and blonde amps.
Since , more interesting factoids of interest have surfaced and are presented here.