Jeff Weinberg, W8CQ

Your world-wide source for
Heathkit, Drake, Collins and Dentron
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]


Harbach Electronics Will Be Closed From Thursday, 24 April 2014 Through Friday, 02 May 2014

23 April 2014:  Harbach Electronics will be closed from Thursday, 24 April 2014 through Friday, 02 May 2014.  I am taking a short, but needed vacation to do a little golfing in the Sand Hills of North Carolina.  During this time you may still place orders through the website ordering system, but no orders will be filled or shipped until I return.  I will have my tablet with me and will try to answer emails in the evenings.  73, Jeff  W8CQ

***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.