GPS-Based Frequency Standard


Proudly made in the U S A

This modern and highly accurate frequency standard is something you can readily have, thanks to the efforts of Brooks Shera W5OJM. Using the once per second timing pulse available from the GPS system to control a VCXO, you can expect to achieve an accuracy of a few parts in 1011, about 10,000 times better than the time honored WWV zero beat method. See JLY 1998 QST for full details. (QSTArticle.pdf).

Only the circuit board is available from A & A Engineering
For source code and hex files - see links below

Order #217 - PCB

1 to 9 boards - $19.95 each
10 or more - $17.50 each

Shipping via first class mail to US 48 is
$3.50 for 1 - 3 boards
$6.50 for 4 or more boards

Shipping via Priority Mail to Alaska or Hawaii
$5.95 for 1 - 3 boards
$7.95 for 4 or more boards

California Residents add 8.00 % sales tax per order

Foreign orders please add $8.50 for 1 - 3 boards
$ 12.50 for 4 or more boards
Air Mail Shipping

We no longer accept credit cards directly, only through PayPal, (see ordering information)

We now accept check, money order or PayPal

PayPal, American Express, Discover, MasterCard or Visa through (see PayPal information)

For more info, source code and hex files - see:

Or follow this link to Brooks Shera website:

A & A Engineering 7970 Orchid Drive, Buena Park, CA 90620-1930
Email :

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