The largest and unique short wave database in the world covering all Broadcasting and UTILITY Stations 1.6-30 MHz along with last monitoring date and many further details
ILGRadio  since 1983 the whole short wave spectrum in one hand
UPDATE INFO:
B22 updates on a DAILY basis: last upload March 19th 2023 (2010 UTC) incl.N-American DST
Monitored and verified data: Year 2023: 14897, Year 2022: 15860, Year 2021: 10414 data entries, more March 2023 STATISTICS
Important web pages for help: Explaining ILGRadio Data Fields and The Signal Types of the ILGRadio Database
SIGMIRA Software for UTILITY Signal Converter

SIGMIRA Software for UTILITY Signal Converter

ILGRadio Info

Description
Sigmira™ is a Software Defined Radio (SDR) application program that runs on Windows. It operates with with an external conventional receiver, RFSpace SDR-IQ™, RFSpace SDR-14™, RTL-SDR, SDRplay RSP, or SDR-RADIO.com networked receiver. Sigmira offers wideband spectrographic, waterfall, and phase plane displays. It also demodulates various military, utility, and "ham" radio signals.
 

LINK:

Sigmira
click for the converter software