https://www.moonraker.eu/mfj-55-upgrade-for-mfj-784?___store=english6824MFJ-55 - Upgrade for MFJ-784https://www.moonraker.eu/media/catalog/product/h/0/h0-001226a.jpg64.9964.99GBPOutOfStock/Amateur Radio Equipment/Other Accessories/Internal Boards (Filters, Crystal Units etc)The MFJ-55 will upgrade your MFJ-784 with most of the software features of the MFJ-784B. The MFJ-55 will upgrade your MFJ-784 with most of the software features of the MFJ-784B.MFJadd-to-cart5056109227287MFJN/AsupplierCosttags