DFD2 Digital frequency readout kit for Collins S line, FT101, Heathkit SB301 and TS520
BOAT ANCHORS
Globe Scout 680 - Simple Audio Modification
Harbach Electronics Product Instruction Sheets .pdf file format
Swan 6 B Manual Just scroll halfway down the page to the Swan 6 B manual
T-368 Modifications
COLLINS
Collins 30L-1 Manual
Collins 30S-1 Manual
Collins 32V-3 - Modified Speech Amp/Driver by WA1HLR
Collins 75S-1 CW Filter Installation .pdf file
Collins Amateur Service Agency Bulletins
Collins Parts Harbach electronics
Collins R-390A 32V AC Wiring Danger by Chuck, WA4HHG
Collins R-390A Audio Modifications by Chuck, WA4HHG
Collins Radio Equipment Manuals
Collins Service Bulletins and Service Information Letters
Souping Up the 75A-4 .pdf file
DRAKE
Drake Manuals and Schematics
Drake Parts Harbach electronics
Sherwood / Drake R-4C
E. F. JOHNSON
Johnson Ranger Modifications
Johnson Ranger - Simple Audio Modification
Johnson Viking I and II - Audio Conversion
Johnson Viking I and II - Audio Conversion by Ed, KS3K
HALLICRAFTERS
Hallicrafters BC-610
HAMMARLUND
Hammarlund SP-600 Audio Modifications by Chuck, WA4HHG
HEATHKIT
Dialcord modification for SB/HW drive belts by N4NRW
Heath Mail List No Subject - Message Body Text: subscribe HEATH
Heath Schematics at Bama
Heathkit "Cross Reference" Cross Ref List of Heathkit p/n's to Indusrty Std
Heathkit DX60 Audio Mods by Bob, K4TAX
Heathkit DX60 Audio Mods by Bill, WC3K
Heathkit DX60 - Modified Speech Audio by KS3K
Heathkit DX100 - Audio Modifications
Heathkit DX100 - Low Cost Drive Pot Replacement by Norm, WB2SYQ
Heathkit DX100 - Screen Modulation Optimization
Heathkit HA 10 Warrior Amplifier diagram
Heathkit Manuals
Heathkit Master Parts List -
PDF File #1 3.38 MB
PDF File #2 2.84 MB
PDF File #3 2.93 MB
PDF File #4 2.92 MB
Heathkit Message Board
Heathkit Mod SBM-102-1
Heathkit Parts Available
KB7RGG's Heathkit Product Matrix Service Bulletins, Equip list by p/n with photos etc
Modified HF kW Amplifers for 6m Conversions for SB200, 220, 230, 1000 & other brands
QSK for the TL-922 & SB-220 With Circuit Improvements for the TL-922
SB-200 Amplifier Rebuild Notes
SB-200 Keying Modification Schematic
SB-200 Modifications
SB200 Parts Harbach electronics
SB-200 Resources Restoration, upgrading, parts, etc
SB-200 Standby Mod by N4NRW
SB-220 - Adding 160 Metre Coverage
SB-220 Amplifier Circuit Improvements
SB220 Parts Harbach electronics
SB-220 - Putting The Amplifier On 6M Schematic
SS-101 Wiring Diagrams Harbach electronics
The Heathkit Shop Nice collection of Heathkit Ham gear
Two RIT Mods for the HW-101 PDF file, by N4NRW
ICOM
Extended TX for 706mkII by OH6KTR
IC-706 Extended RX Mod by OH6KTR
IC-706 Extended TX Mod by OH6KTR
IC-706 Extended TX (1.6-54MHz)+ The Yellow Wire RX Mod by OH6KTR
Icom IC-706 Review by G4ZFE
IC-706 Yellow Wire RX Mod by OH6KTR
Mods.dk
Mods For The Icom IC-706 by G3YCC
Receiver Modifications for the IC-706 receive 300 Khz to 185 Mhz - by OH6KTR
IC-746 Mods by W4LD
IC-775 Mods by W4LD
Simple ICOM CAT Interface by OK2WY
JRC
JRC Plug Pinout
KENWOOD
Kenwood Plug Pinout
Mods.dk
TM-D700A Mods
TM-D700A Software
STANDARD
Standard Plug Pinout
YAESU
FT-51-800 Mod
FT-100 Resource Page by WM7D
FT-101 - Audio Modifications by Bob, N1UJS
FT-101 HF Transceiver Home Page History, mods, specs, & more, by NW2M
FT-817 Discussion Group Discuss the operation of and modifications to this QRP rig
FT-890 Service Manual on CD e-Mail me at va3rj_at_idirect.com for information
FT-920 Resource Page by WM7D
FT-1000MP Page Dedicated to the FT-1000MP enthusiatist, by VA3CR
Mods.dk
Yaesu Plug Pinout
OTHER LINKS
Modifications Listing by QRZ.com
RS232/TTL Interface Schematic To control a rig - by Jon, KE9NA
Tech Info for homebrewing, modifications, repairs, AM theory, and lots of schematics
Various Radio Modifications
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