PM-400 Replacement Power Module for the Dake L-4/L-4B and L-7 Power Supply The PM-400 is a complete replacement power supply module for the Drake L-4/L-4B/L-7 remote power supply. It is designed around and features new modern 220uF 450VDC electrolytic capcitors, 1000 PIV 3A diodes, new 100K 3W bleeder resistors.  The unit installs easily in the remote power supply chassis and replaces both of the old diode/capacitor boards.                   Our Price $100.00 - Shipped in the USA - International shipping cost to be added.

SS-400 Soft-Start Module for the Drake L-4 & L-4B Amplifier The SS-400 limits inrush current during amplifier start-up by placing a small resistive load in series with the AC mains. The load is switched out of the circuit by the relay a few milliseconds later. The soft-start mounts on the underside of the RF deck and safely limits inrush current to protect the hard-to-find and costly-to-replace ON-OFF switch, tubes, filter capacitors and high voltage transformers.       Our Price $45.00 - Shipped in the USA - International shipping cost to be added.

SW-400 Power & SSB/CW Switch Rebuild Kit for L-4/L-4B/L-7/L-75 When the Drake L-4/L-4B/L-7/L-75 power or SSB/CW rocker switch becomes defective there are very few repair options except to replace it with one from a parts amplifier. The original switch is no longer available from any supplier.  This kit includes the back half body of the switch housing containing stationary spade lug contacts, two rocker arm contacts, tension springs & pistons, and crimp-on connectors; everything you need to completely rebuild the L-4/L-4B/L-7/L-75 power and/or SSB/CW rocker switch.      Our Price $25.00 - Shipped in the USA - International shipping cost to be added.

SK-401 Soft-Key for the Drake L-4 & L-4B The SK-401 safely acts as an amplifier interface to your modern transceiver to the Drake L-4 or L-4B. This unit is mounted inside the amplifier and transforms the 24-27VDC key closure to approximately 1 VDC at 1.5 mA.  Without it you run the risk of severely damaging the keying circuit in your transceiver.      Our Price $27.00 - Shipped in the USA - International shipping cost to be added.

RES-400 Replacement HV Safety Resistor for the Drake L-4/L-4B/L7 Power Supply The RES-400 is a direct replacement for the original IRC SPH-style safety resistors used in the Drake L-4/L-4B/L-7 remote power supply.  These resistors are designed to open under conditions of high plate current draw from the power supply (tube arc or power supply short) to protect expensive tubes and power supply components.  They are sold in packs of 5.    Our Price $6.00 - Shipped in the USA - International shipping cost to be added.

Strain Relief Bushings and 5K 10W Resistor for the Drake L-4/L-4B/L7 Power Supply The SRB-400 is a direct replacement for the original strain relief bushing for the Drake L-4/L-4B/L-7 power supply AC cord (flat).  The SRB-401 is a direct replacement for the Drake L-4/L-4B/L-7 power supply remote RF deck multi-conductor cable (round).  The RES-407 is a replacement for the 5K 7W resistor in the power supply.  The new resistor is rated at 10W instead of the original 7W.    SRB-400  $1.00     SRB-401  $1.00     RES-407  $4.00 Shipped in the USA - International shipping cost to be added.

RES-402 Replacement 50K 50W Bias Resistor for the Drake L-4/B & L-7 Supply The RES-402 is a direct replacement for the 50KOhm 50W bias resistor used in the Drake L-4/L-4B/L-7 remote power supply.. Over time, the old resistors change value and cause over- or under-biasing of the tubes. If they fail completely (short), plate voltage can be shorted to critical RF deck components. If they fail completely (open), the tube will lose their cut-off bias.  NOTE:  There are 2 of these resistors in the power supply!   Our Price $8.00 - Shipped in the USA - International shipping cost to be added.

RY-L4B Replacement T/R Relay for the Drake L-4/L-4B The RY-L4B is a direct replacement T/R relay for the Drake L-4/L-4B. It is a 3PDT relay with a 24VDC coil.       TEMPORARILY OUT OF STOCK TYRING TO FIND A NEW SUPPLIER AT A REASONALBE COST     Our Price $30.00 - Shipped in the USA - International shipping cost to be added.