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 permissible in your locale.

Subject / Started by Last post
Harmonics

Started by Dude111

11 Replies
4433 Views
Last post January 12, 2020, 0244 UTC
by Dude111
8 Replies
3052 Views
Last post January 11, 2020, 1827 UTC
by moof
4 Replies
2131 Views
Last post January 09, 2020, 2102 UTC
by chanito
29 Replies
11423 Views
Last post January 06, 2020, 1419 UTC
by ChrisSmolinski
2 Replies
3739 Views
Last post January 01, 2020, 2142 UTC
by JimIO
6 Replies
3146 Views
Last post December 31, 2019, 2250 UTC
by chanito
4 Replies
4425 Views
Last post December 31, 2019, 0115 UTC
by Dude111
Realistic (Radioshack) DX-394

Started by Matt285

3 Replies
3229 Views
Last post December 29, 2019, 1357 UTC
by BoomboxDX
Sticky keys on portable rigs

Started by Matt285

0 Replies
1160 Views
Last post December 28, 2019, 1353 UTC
by Matt285
LZ1AQ amplifier kit

Started by Matt285

4 Replies
1716 Views
Last post December 26, 2019, 2203 UTC
by ChrisSmolinski
17 Replies
4218 Views
Last post December 18, 2019, 0221 UTC
by chanito
Discone antennas

Started by Matt285

4 Replies
2624 Views
Last post December 17, 2019, 2329 UTC
by chanito
0 Replies
1200 Views
Last post December 15, 2019, 2004 UTC
by ChrisSmolinski
Fan dipole

Started by Matt285

1 Replies
1334 Views
Last post December 13, 2019, 2316 UTC
by Josh
0 Replies
1885 Views
Last post December 09, 2019, 2333 UTC
by ThaDood
1 Replies
1428 Views
Last post December 09, 2019, 0200 UTC
by radiogaga
0 Replies
1191 Views
Last post December 07, 2019, 1723 UTC
by chanito
SMA adapter

Started by Matt285

12 Replies
3805 Views
Last post December 04, 2019, 2021 UTC
by KaySeeks
Car stereo Shortwave

Started by Matt285

5 Replies
2018 Views
Last post December 02, 2019, 1546 UTC
by chanito
2 Replies
1740 Views
Last post December 01, 2019, 1557 UTC
by pinto vortando

 

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

Locked Topic
Sticky Topic
Poll


HFUnderground T-Shirt
HFUnderground T-Shirt
by MitchellTimeDesigns