Many thanks to SWLing Post contributor, Ron, who notes that Hamcrafters appears to be planning a replacement for the Palomar VLF converter.
Here’s the product description:
The Hamcrafters VLF Converter is based on the original Palomar design and converts 10 KHz – 500 KHz to 4.010 to 4.5 MHz. This allows use of your HF Receiver or Transceiver and all its filters, noise blankers, DSP, and memories while tuning the VLF band. Modern HF radios have poor sensitivity in the VLF range (by design). Using this converter with a simple wire antenna will allow receiving of navigational beacons, time signals, and other VLF signals.
The Palomar is well-known among longwave DXers but hasn’t been in production for some time. Indeed, Ron adds, “The last two original Palomars went for $343 and $260 on eBay. Is there a demand? You bet!”
Thanks for the tip, Ron.