We seek to understand and document all radio transmissions, legal and otherwise, as part of the radio listening hobby. We do not encourage any radio operations contrary to regulations. Always consult with the appropriate authorities if you have questions concerning what is permissable in your locale.

Subject / Started by Last post
1 Replies
1826 Views
Last post June 04, 2011, 2103 UTC
by stevechisox
2 Replies
1277 Views
Last post March 08, 2018, 0027 UTC
by MDK2
0 Replies
774 Views
Last post March 16, 2018, 2352 UTC
by kris
2 Replies
1201 Views
Last post March 23, 2016, 1442 UTC
by Ron - Calif.
16 Replies
4696 Views
Last post April 14, 2021, 1402 UTC
by sat_dxer
8 Replies
3561 Views
Last post June 21, 2013, 1504 UTC
by Strange Beacons
XPA

Started by Ary-B

0 Replies
725 Views
Last post June 30, 2016, 1743 UTC
by Ary-B
XPA

Started by Ary-B

0 Replies
724 Views
Last post October 19, 2016, 1027 UTC
by Ary-B
XPA HM01

Started by Ary-B

0 Replies
1280 Views
Last post May 10, 2014, 0706 UTC
by Ary-B
0 Replies
795 Views
Last post November 22, 2014, 2100 UTC
by vhavrilko
0 Replies
790 Views
Last post November 22, 2014, 2103 UTC
by vhavrilko
0 Replies
1706 Views
Last post December 15, 2009, 1258 UTC
by Sealord
0 Replies
980 Views
Last post September 25, 2013, 1244 UTC
by Sealord
2 Replies
2218 Views
Last post October 16, 2013, 1804 UTC
by Sealord
0 Replies
1065 Views
Last post October 02, 2013, 1329 UTC
by Sealord
0 Replies
1046 Views
Last post October 09, 2013, 1149 UTC
by Sealord
0 Replies
1193 Views
Last post October 23, 2013, 1352 UTC
by Sealord
10 Replies
7876 Views
Last post August 30, 2019, 1530 UTC
by MDK2
0 Replies
1678 Views
Last post September 16, 2012, 1823 UTC
by ChrisSmolinski
3 Replies
2772 Views
Last post December 17, 2009, 0120 UTC
by Sealord

 

Normal Topic
Hot Topic (More than 15 replies)
Very Hot Topic (More than 25 replies)

Locked Topic
Sticky Topic
Poll



Item image   Simplified Practical Filter Design by Irving M. Gottlieb

 $14.95