Dating Vibroplex Keys

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PDF NUMBER APROX . YR NUMBER APROX . YR - Vibroplex
Date | The Vibroplex Collector's Page
Vibroplex - Since 1905
On Identifying and Dating Vibroplex Bugs by K4MSG - Paul . . .
How Old Is Your Vibroplex? | QRZ Forums
Vibroplex Serials per Year - KD2UJ .COM
A Short History of Vibroplex Semiautomatic Telegraph Keys
Semi-auto Telegraph Keys ( Bugs ) - Telegraph & Sci . . .
Identify | The Vibroplex Collector's Page
Semi-auto Telegraph Keys ( Bugs ) - Telegraph & Sci . . .
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www .vibroplex .com › techdocs › WW7P-Serial-Number-List .pdf
This article deals only with the dating of the keys . For much more information on Vibroplex keys such as pictures, identification, ads, patents, modifications within models, nameplate data, etc ., I recommend you purchase Tom French's latest book " Vibroplex Collector's Guide", Revised Edition . Tom's address is: P .O . Box 88 Maynard, MA 01754
www .vibroplexcollector .net › ?page_id=427
Until recently, the Vibroplex Co . put serial numbers on almost all of its keys , except a few early production runs . However, records of production dates and serial numbers were lost, discarded, or destroyed . There was no way to match a key's serial number to a date until 1996, when John Elwood, WW7P, published a list of serial number ranges and . . .
These high quality keys are superb both aesthetically and mechanically and will be a fine addition to any ham station . Vibroplex ® is the exclusive USA/Canada distributor . HI-MOUND Morse Code keys . Made in Japan . Founded in 1947, Hi-Mound builds economy priced straight keys and iambic paddles suitable from the beginner to the long time ham operator .
A report on identifying and dating Vibroplex Bugs by Paul Bock - K4MSG of Hamilton, Virginia . I have provided descriptive information to assist the interested collector or owner of Vibroplex semi-automatic keys in identifying the various models and determining their authenticity .
There was no way to accurately date a Vibroplex by its serial number until John Elwood, WW7P, published his well researched document in 1996 . Starting in 1990, John compiled this information from a list of more than 3000 Vibroplexes, their serial numbers, and the date they were purchased (invoices still avaialble), if known .
www .kd2uj .com › Telegraphy › Vibroplex › serialchart .html
Vibroplex Serial Numbers per Year . John Elwood, WW7P, did a heroic job of determing the age of Vibroplex keys by serial number . One place to find his document is on the Vibroplex site here . Using WW7P's data, I built a spreadsheet and calculated how many serial numbers were used in each year from 1905 to 1999 and then I graphed it .
A report on identifying and dating Vibroplex Bugs by Paul Bock - K4MSG of Hamilton, Virginia . In 1902, telegrapher and inventor Horace G . Martin of New York developed a new form of telegraph key that operated by a side-to-side lever and would send dots automatically as long as the lever was held in one direction, and send dashes manually when the lever was pressed the other way .
w1tp .com › im8000b .htm
note on the dating of vibroplex bugs: John Elwood, WW7P has been gathering information about Vibroplex keys for many years . He has been able to reconstruct many of the dates of manufacture of the various models of Vibroplex keys which had been lost in the Vibroplex fire .
www .vibroplexcollector .net › ?page_id=551
If your Vibroplex doesn't have the name stamped underneath and isn't one of the three above models, first measure the width of the base . It will be 2 .5″, 3″ or 3 .5″ wide . Next, look in the table below for a damper assembly like the one on your Vibroplex . An "L" damper is made from two cast pieces .
w1tp .com › im8000a .htm
6178 VIBROPLEX ORIGINAL: Number 50671 . Parts key . No label . As below .1913 . 6180 VIBROPLEX ORIGINAL:(35KB) Serial Number 50686 . Label reads: "Trade THE VIBROPLEX mark" 84356 Nov 28, 1911, Pat Aug 9, 1904, Jan 22, 1907, Oct 29, 1912 Nov 5, 1912 . Others pending . Horace G . Martin, New York,USA . Circa 1913 .
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Dating Vibroplex Keys