I am looking for a power supply for experimenting with tube-type equipment. I believe any of the following would work. PS-1, PS-2, PS-3, PS-4, IP-17, IP-32, IP-2717(A), SP-2717(A). If you have any of these for sale, Please send me a quote including shipping to Zip 93065. Thank you. 73, Ed Richards K6UUZ AMI member #1534