Search The Directory The Web for Home > Recreation > Amateur Radio > Boatanchors > Modifications New! Submit a site   whatUseek Collection Sites (submit a site ):   Give your site great placement in this category in as little as two business days!     whatUseek Directory Site Listings:   6146 Diagrams FTP - Download GIF and PDF diagrams here for the modification of power amplifier stages from Sweep tubes to 6146es.   AM Rig Modifications - From The AM Window folks. Excellent source of information.   E.F. Johnson Co. Ranger Mods - Tim Smith, WA1HLR shows his audio improvements for this rig.   Harbach Electronics - Supplier of Retro-kits for Heath SB-200/210 and SB-220/221 Amplifiers. Repairs also offered.   Heathkit HW-16 Modifications - WA3REY presents a number of transmit and receive mods.   Hot rodding AA5 radios - How to make vast improvements in the typical "All American Five" tube receiver.   K5DKZ - 6146 conversion kit for the Drake T4X (instead of two 6JB6 finals.) He also offers other kits and repair tips for radios & amplifiers etc.   KC2KJ's Service Data - KC2KJ's RCA AR77 & AR88 receiver technical info. Ads and service data.   R-390A/URR Power Supply Modifications - Pictures and narrative plus a schematic diagram for the improvements.   Radio Modification files - From qrz dot com. Many files of mods arranged by brand and model. A few Heath etc.   SONIC WEB - Tube Amplifier modifications & technical info that includes a variety of popular older amateur radio linear amplifiers.   Southeast Iowa Technical Society - Articles on modifying the Motorola Mitrek for the ham bands.   Valiant Mods - W8TOW describes in detail how to improve the audio on the Johnson Viking Valiant transmitter.   Viking I & II Audio Mods - Soup up your Johnson!   WA2ISE Old Radios - Information, pictures and schematics. History of the All-American 5. Includes modifications, and sub-miniature tube info. Help build the largest human-edited directory on the web.   Submit a Site - Open Directory Project - Become an Editor

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