Jeff Weinberg, W8CQ

Your World-Wide Source For Amateur Radio Amplifier Parts & Upgrade Kits

Welcome to the

Harbach Electronics, LLC Website

TR4CRelay img_1197233141_14979_1225634373_mod_123_131[1] img_1197233141_14901_1197233143_mod_197_129[1] img_1197233141_14993_1319321035_mod_170_128[1]


***UPDATE:  New Plug-In Relay Adapter Kits for the Drake TR-4 & T-4X/T-4XB***

19 April 2014:  In response to customer requests, I am now pleased to announce availability of 2 new kits, the RA-TR4 and  the RA-T4X/B.  These are plug-in relay adapter kits for the Drake TR-4 and T-4X/T-4XB radios.  These kits replace the old chassis-mounted T/R relay with a small PC board and new plug-in relay.  All components are included in the kits including a new relay, socket, PC board, wire, spaghetti tubing and complete installation instructions.  They are available in the Drake products section.  I will also have them at Dayton.  73, Jeff  W8CQ

***UPDATE:  W8ZR StationPro-II Kits Temporarily Out of Stock***

04 April 2014:  My inventory of SP-II kits is temporarily sold out, but additional circuit boards are on order for the kits. SP-II kits should be available again in about 4-6 weeks. I’ll place a notice here when kits are ready to ship.  73, Jeff  W8CQ

***UPDATE:  New PM-2500 Kit for the Dentron MLA-2500 Development Nearly Complete***

15 December 2013:  Development of the new PM-2500 kit for the Dentron MLA-2500 and MLA-2500B amps is nearly complete!  The kit will contain a new rectifier/control board and a new filter capacitor board.  The control board uses a pre-programmed PIC chip and a MOSFET to replace the time delay tube.  A new RLY2 and socket will also be included in the kit along with all other discrete components.  It looks as if one kit will be compatible with both the MLA-2500 and MLA-2500B amps.  The first prototype boards have been submitted for manufacturing.  I will be looking for a couple beta testers soon.  If you are interested, please let me know.  73, Jeff  W8CQ

***NEW Product Announcement***


29 November 2013:  At the request of many customers, Harbach Electronics, LLC has added the RY-T4RC/T4XC replacement relay to the product line.  This relay is an exact replacement T/R relay for the Drake TR-4C and T-4XC.  It is located in the “Drake Equipment” section of the website.