Modifications

6146 Diagrams FTP

bama.sbc.edu

Download GIF and PDF diagrams here for the modification of power amplifier stages from Sweep tubes to 6146es.

71 visits Feb 24, 2025 Details

AM Rig Modifications

amwindow.org

From The AM Window folks. Excellent source of information.

178 visits Apr 19, 2026 Details

E.F. Johnson Co. Ranger Mods

amwindow.org

Tim Smith, WA1HLR shows his audio improvements for this rig.

70 visits Dec 23, 2025 Details

Eico 730 Modulator

amwindow.org

Improvements made to a boatanchor classic.

274 visits Oct 4, 2024 Details

FT-101 Mods

amwindow.org

Yaesu-Musen Company FT-101 series audio modifications for improving fidelity on the air.

80 visits Oct 16, 2025 Details

Heathkit HW-16 Modifications

a3rey.com

WA3REY presents a number of transmit and receive mods.

88 visits Jun 23, 2025 Details

Hot rodding AA5 radios

geocities.com

How to make vast improvements in the typical &quot;All American Five&quot; tube receiver.

327 visits Jul 1, 2024 Details

K5DKZ

qsl.net

6146 conversion kit for the Drake T4X (instead of two 6JB6 finals). He also offers other kits and repair tips for radios and amplifiers.

191 visits Sep 29, 2025 Details

Radio Modification files

qrz.com

Files of mods arranged by brand and model, plus a few Heath.

54 visits Oct 18, 2024 Details

Southeast Iowa Technical Society

seits.org

Articles on modifying the Motorola Mitrek for the ham bands.

101 visits Jan 30, 2026 Details

Valiant Mods

msu.edu

W8TOW describes in detail how to improve the audio on the Johnson Viking Valiant transmitter.

121 visits Aug 4, 2025 Details

Viking I and II Audio Mods

amwindow.org

Soup up your Johnson.

180 visits May 9, 2024 Details

WA2ISE Old Radios

geocities.com

Information, pictures and schematics. History of the All-American 5. Includes modifications, and sub-miniature tube info.

39 visits May 13, 2024 Details

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