This Tube set of 2, has been tested on a Dyna-Quick Model 700 Dynamic Mutual Conductance Tube Tester. All NOS tubes I sell measure 100 % Grid Emission.  The tube in the photograph is the actual Tube in this listing. This JAN Mil-Spec tube has a date...

This Tube has been tested on a Dyna-Quick Model 700 Dynamic Mutual Conductance Tube Tester. All NOS tubes I sell measure 100 % Grid Emission.  The tube in the photograph is the actual Tube in this listing. This JAN Mil-Spec tube has a date code...

Collins 75A-4 Brand New Peter Dahl Replacement Main Transformer P/N PWDP13053. This Filter choke can be prone to fail in the a fore mentioned Collins receivers.  When this happens they no longer filter the Hum in the audio properly, and you can hear...

Collins 312A-1 ORIGINAL Speaker / Control Manual Nov 1955 #4  This Rare Manual is in Very Good Condition! If you order multiple manuals, I will combine the shipping and refund the difference in cost.

This Collins 75A-4 Receiver Original Manual P/N 520 5052 00 3rd Edition Revised 2 July 1957, is a brand new, old stock manual, in new condition. This manual looks much newer and is made like most of the Collins S-Linemanuals This is a very Late 75A-4...

This Collins 75A-4 Receiver Original Manual P/N 520 5052 00  Revision 1 October 1955, is a brand new, old stock manual, in new condition. This is an early 75A-4 manual. It is complete with the fold out schematic diagram intact. This and every Manual...

This Collins 75A-4 Receiver Original Manual P/N 520 5052 00 3rd Edition Revised 2 July 1957, is a brand new, old stock manual, in new condition. This is a very Late 75A-4 manual which will have All the Factory Updates. It is complete with the fold out...

This Collins 75A-4 Receiver Original Manual P/N 520 5052 00  Revision 1 October 1955, is in Excellent condition. This is a very early 75A-4 manual. It is complete with the fold out schematic diagram intact. This and every Manual I sell, comes with a...

This Collins 75A-4 Receiver Original Manual P/N 520 5052 00 3rd Edition Revised 15 March 1957, is in Excellent condition. This is a very Late 75A-4 manual which will have most of the Factory Updates. It is complete with the fold out schematic diagram...

This Collins 75A-4 Receiver Original Manual P/N 520 5052 00 3rd Edition Revised 15 March 1957, is in Excellent condition. This is a very Late 75A-4 manual which will have most of the Factory Updates. It is complete with the fold out schematic diagram...

This Collins 75A-4 Receiver Original Manual P/N 520 5052 00 3rd Edition Revised 15 March 1957, is in Excellent condition. This is a very Late 75A-4 manual which will have All the Factory Updates. NOTE: This manual has several Service bulletins with it...

This Collins 75A-4 Receiver Original Manual P/N 520 5052 00 3rd Edition Revised 2 July 1957, is in Excellent condition. This is a very Late 75A-4 manual which will have All the Factory Updates. It is complete with the fold out schematic diagram intact...