The largest and unique short wave database in the world covering all Broadcasting and UTILITY Stations 1.6-30 MHz along with the last monitoring date and many further details
ILGRadio  since 1983 the whole short wave spectrum in one hand
UPDATE INFO:
B22 updates now on a DAILY basis: last upload November 26th 2022 (2215 UTC)
Monitored and verified data: January ... November 2022: 25843, Year 2021:  11631 data entries, more details here STATISTICS
New web pages available: 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