Printed Circuit Board # 9
Universal Preamp Power Supply
(PC Board Only)
The universal preamp power supply PCB is for the AWA MM preamp or similar applications. Four voltage regulators for heaters and B+. Transformers on PCB: 12VA or 24VA size.
B+ #1: 200-300V variable @ 5 mA, has a second output with additional filter for low level stage
B+ #2: 200-300V @ 5 mA or 20 mA (up to 70 mA with a larger transformer)
Dual 12.6VDC heater supplies (one can be biased positive to keep within H-K limits with a cathode follower, cascode, etc.). 0.3A each (0.6A with larger transformer), 6.3VDC or adjustable supply is optional.
PCB is 6.5” x 6.5”, includes a typical parts list and schematic. Bare PCB only, no other parts included.
This is a project for advanced builders who are familiar with the hazards of AC line voltage and high voltage DC. Additional information is available at the link below.
PCB #9 is being offered in the AWA Store for $30 including U.S. Postage; use the form below for non-U.S. postage, multiple orders, or for the AWA member’s discount.
A detailed description of the PCB #9 preamplifier power supply project is available by clicking on the button to the right.
This offering is for the bare PCB only and additional components are required.
PCB Info Help
If you have any questions, contact the staff at AWAHelpDesk@antiquewireless.org.
To request an AWA Membership discount or shipping information for Non-US shipping, utilize the form below. Be sure to specify the PCB Item # and the quantity of each board in your request.