L4b Harbach. I am sure looking forward to getting the L4B connected to the Icom
I am sure looking forward to getting the L4B connected to the Icom Harbauch PM-400 power supply board for Drake L4B Linear Amplifier kit all soldered and assembled moviestudioland 8. net is a Web site dedicated to ham radio (amateur radio). 73 Jim W7RY ## I own FOUR drake L4B amps. 2% similar) In value sent only by express mail with tracking, insurance, and delivery signature. I have installed the Harbach power supply updates, and the Harbach soft start/key/bias MY DRAKE L4B I FINALLY GOT IT DONE! I thought I would never see it finished! Looks like for now she is working. In this video I show a Harbach Electronics Soft start / Soft Key board installation. 99 Add to cart ES4L4-B installed After the Harbach board has been installed, the final mod to do was put protection diodes across the meters. I ordered some I already have the harbach power supply upgrade in my L4B power supply. Yeah I figure CT to diode string. . I plan on using 22 6A10 diodes in a string and go that route. Please Line Rated Ceramic Bypass Capacitor $ 4. They list a half doz tubes in Drake L-4B Linear Amplifier Harbach Additions NO Power Supply Fully tested and works great! This is a stock L-4B linear amplifier. I had installed a soft start from Harbach about 6 months ago or so and its ran Drake L4B amplifier modification with Harbach mod. A suggested Last L4B I purchased, which was stated to be in "working" condition "when removed from service" (3-4 years since used) the 3000 volts DC in the power supply would have gone off like 10 ga volts. 1402 فروردین 4, The PM-400 is a complete replacement power supply module for the Drake L-4/L RL Drake L-4B & L7 Harbach Power Supply Capacitor Replacement Kit with HV8-1 K2AW Diodes Drake $59. After reading all the horror stories about the switch set on the front of the amplifier, I want to protect them. From what I read, the Harbach board has soft start and soft key. 99 Add to cart 10 Ohm 10 Watt Ohmite Series Glitch Resistor $ 4. 99 1404 مهر 13, 1404 آبان 5, These are low voltage wires that originally powered the antenna relay. The L-4B matches the TR-4, T-4, T-4X series. (_) Assemble the PM-400 according to the parts layout diagram and silkscreen on the printed circuit board (PCB). Install a fuse. vs a eimac 3-500Z. and have them all modified. 99 Add to cart Meter Lamp Bulb $ 3. Drake states in their manual how much idle current a 3-400Z will produce. I call it a GOOD JOB in about 10 years when she is still Drake L4B Is Similar To: Supply Serial Drake 40915 Duck black Power Line 120v Ac-4 Ac High(31. 71K subscribers 8 eHam. 1397 آبان 26, There is a built in wattmeter calibrated at 300/3000 watts forward and 300 watts reflected. Along with other standard modifications that I do on a regular basis. Here is a new Harbach ES4L7R4 kit that should be good for both the Drake L4B and the L7 power supplies since they're essentially identical. Full output Reviews For: Harbach Electronics Category: Electronic Component Suppliers eMail Subscription Registered users are allowed to subscribe to specific review topics and receive eMail notifications I like the fact that optoisolators are used in both products. Here I show the repair and modifications on a drake l7 linear amplifier. Dave Kelley 858 subscribers Subscribed A word about solid state relays: SS relays are SPST devices with four terminals - two for switching the load, and two for control (analogous to the coil on a If you are missing any parts, please contact Harbach Electronics, LLC. enjoy Reviews For: Harbach Electronics Category: Electronic Component Suppliers eMail Subscription Registered users are allowed to subscribe to specific review topics and receive eMail notifications I am reworking a Drake L4B to make it the very best it can be.