Drake Technical Tips
Drake Home Page WB4HFN Home Page
Repairs And Troubleshooting Tips
Low Cost Power Switch Replacement For the Drake L-4B & L-7 Amplifiers , by: Ron Baker / WB4HFN
Drake AC3 & AC4 Power Supply Troubleshooting, by: Mark Gilger / WB0IQK
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From the Desk of, and Author of "KL0S Shack Notes", Dino Papas / KL0S
Amplifier Tube Socket Repair, by Dino Papas / KL0S
Drake RF Amplifier Power Supply Fixes, by Dino Papas / KL0S
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Another Drake AC-4 Power Supply Upgrade, by Jeff Covelli / WA8SAJ
Drake L4/L4-B Blower Fan Repair/Upgrade, by Gene McCalmont / W5DDW
Drake L4-B Power Switch Repair & Refurbishing, By David Drake / WD9CMD
Eliminating Drake TR7 Key Clicks, By Floyd Sense / K8AC
What's Inside the Drake TR-7 Transceiver, by Ron Baker / WB4HFN
Why Is The 8BN8 Tube Is Used In The Drake 2B Receiver, by: Garey Barrell / K4OAH
Rebuilding The Drake PTO Assembly "Smooth As Silk Tuning", by: Neil Rosenberg / K1VY
T4XC Transmitter with intermittent or erratic power output, by: Ron Baker / WB4HFN
Solving High Voltage Connector Problems with the Drake Amplifiers, by Evan Rolek / K9SQG
R4, R4A, & R4B Series Receiver & T4X Transceive Adjustment, by: Mark Gilger / WB0IQK
R-4, R-4B, R-4C Injection Level Problems, by: Mark Gilger / WB0IQK
Drake PTO Grounding, by: Donnie Garrett / WA9TGT
Drake PTO Troubleshooting, by: Mark Gilger / WB0IQK
Drake Parts, Materials & Resources, by: Mark Gilger / WB0IQK
TR4C, R4C, T4XC Repairing the VFO Dial Rubber Bushing, by: Mark Gilger / WB0IQK
Identifying The Drake TR-7 Differences and Versions, by: Ronald Baker / WB4HFN
Relay Care For TR3, TR4, T4X & T4XB, by: Mark Gilger / WB0IQK
Troubleshooting Antenna Relay Problems, by: Mark Gilger / WB0IQK
Repairing the Antenna Switch in the MN-2700 Antenna Tuner, by: Lee Cramer / WB6SSW
Restoring A Drake TR-7 Amplifier To Full Output, by: Floyd Sense / K8AC
Radio Modifications
The N4YG DDS (Digital) VFO and the Drake TR-7, by Floyd Sense / K8AC
Installing the X-Lock-3 in the Drake TR-7, by: Pete Juliano / N6QW
Drake L-4B, Table Top Amplifier Redesign, by: Ron Baker / WB4HFN
Drake TR-7 Improvements - Installing X-Lock VFO Stablizer / KI4GIN
The Drake TR-6 and TR4 Series AM Filter Up Date, by: Jeff Covelli / WA8SAJ
Pin Diode Attenuator For The Drake TR-7 Power Amplifier, by Floyd Sense / K8AC
High Speed Switching For The L-4B Amplifier, by Garry Drummond / K4OR
Electronic Bias Switching For The Drake Amplifier, by Garry Drummond / K4OR
A Homebrew AUX-7 Board for the Drake TR7 and R7, by Floyd Sense / K8AC
Homebrewing The Drake 1544 RV75/R7 Adapter, by Lee Craner / WB6SSW
The Drake TR-7 Transceiver Renewed, by Marc Van Stralen / PA1HFO
Vintage Radio Refurbishing Before Restoration, by Ron Baker / WB4HFN
TR-7 Modification For Wide Band AM Transmitting, by Jeff Covelli / WA8SAJ
Using the Drake TR-7(A) "Store" Switch To Add A Transmit Key Function, by: Ron Baker / WB4HFN
R4C Receiver power supply modification using LM7812 regulator, by: Ron Baker / WB4HFN
Test results using the 6JU6 tube as a replacement for the 6JB6, by: Ron Baker / WB4HFN
T4X Series AM Mode Modification, by: Mark Gilger / WB0IQK
R4 Series AGC Modifications, by: Mark Gilger / WB0IQK
T-4X OR TR-4 DC Fan Installation, by: Mark Gilger / WB0IQK
Adding an AM Filter to a Drake TR-4C, By: Mark Gilger / WB0IQK
Adding An AM Filter To the Drake TR-4CW, by: Jeff Covelli / WA8SAJ
New INRAD Filters For The Drake TR-4CW, by: Jeff Covelli / WA8SAJ
L4 & L7 Replacement Electrolytes - An Inexpensive Drop-In Replacement, by: Evan Rolek / K9SQG
Drake T-4 Line Circuit Modification for High Fidelity AM, by: Thomas Cathey / K1JJ
The “RAC” Digital-Dial for Your Old Boatanchor, by Jeff Covelli / WA8SAJ
Add Two More Switched Coax Connectors To the MN-2700 Tuner, by: Lee Craner / WB6SSW
Programming Modules for the AUX-7 Board, by: Gary Poland / W8PU
The Drake AC-4 And AC-3 Power Supply Upgrade, by: Jeff Covelli / WA8SAJ
Restoration Techniques
Restoring the black finish to the tuning knob insert, by: Ron Baker / WB4HFN
Drake Cabinet Repainting by the Hartzell Manufacturing Company
"The Cleaning Of Wafer Switches", by: Mark Gilger / WB0IQK
A Process For Cleaning Drake Chassis, by: Ron Wagner / WD8SBB
Drake Cabinet Repainting Basics, by: Mark Gilger / WB0IQK
Electrolytic Filter Capacitor Rebuild, By Al Parker / W8UT
Drake Case "Stick Paint' Repair, by: Claudio Pocaterra / I4YHH
Drake Articles From the Users
The Unraveling of Drake's TR4 Series SSB Filter Scheme, by Jeff Covelli - WA8SAJ
Adapting the IQPro VFO to the Drake TR7, by: Floyd Sense - K8AC
Drake Equipment Grading Standard, by Donnie Garrett, WA9TGT
Drake Model 1A, the first receiver manufactured by the company in 1957
The History of the R.L. Drake Company , by: Bill Frost / WD8DFP
The Technology Of Our Times - Technology Behind The TR-7 Transceiver
DXing From The Ground Up, by: Don Tyrrell / W8AD
Color Coded Crystals In the Drake R-4A & B Series, by: Garey Barrell / K4OAH