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History of U.S. Postage Stamp Prices

Prior to the middle of the 19th century, rates were based on the number of sheets in a letter and the distance it was traveling. In 1845, rates were based on the weight of a letter and the distance it was going. Beginning in 1863, domestic letter rates became "uniform," that is, they were based solely on weight, regardless of distance.


Postage listed below is in cents.

Domestic Letters
Effective DatePer 1/2 ounce 
March 3, 18633 
March 3, 18832 
 Per ounce 
July 1, 18852 
November 3, 19173 
July 1, 19192 
July 6, 19323 
August 1, 19584 
January 7, 19635 
January 7, 19686 
May 16, 19718 
March 2, 197410 
 First OunceEach
Additional
Ounce
September 14, 1975109
December 31, 19751311
May 29, 19781513
March 22, 19811817
November 1, 19812017
February 17, 19852217
April 3, 19882520
February 3, 19912923
January 1, 19953223
January 10,19993322
January 5, 20013423
June 30, 20023723
January 8, 20063924
May 14, 20074117
May 12, 20084217
May 11, 20094417
April 17, 20114420
January 22, 201245 
 
Table from the U.S. Postal Service

RF Cafe Software

RF Cascade Workbook
 RF Cascade Workbook is a very extensive system cascaded component Excel workbook that includes the standard Gain, NF, IP2, IP3, Psat calculations, input & output VSWR, noise BW, min/max tolerance, DC power cauculations, graphing of all RF parameters, and has a graphical block diagram tool. An extensive User's Guide is also included. - Only $35.
RF system analysis including
frequency conversion & filters

Smith Chart™ for Excel
Smith Chart™ for Visio
RF & EE Symbols Word
RF Stencils for Visio
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