So, How Does The Remote Palstar BT1500A Perform With The KY6R Mod Bob?

I have been told by The Mission Trail Net that my 75M signal has never been better – and quite a few people said “Are you in my driveway, what did you do?” . .  I tuned the Mod Bob manually this past weekend on 75M, which is a band that my Elecraft KAT-500 could tune but where the KPA-500 only tolerated about 200…

Raspberry Pi Communicating With Arduino Uno

http://www.instructables.com/id/Connect-Your-Raspberry-Pi-and-Arduino-Uno/ Arduino boards are great to dedicate them to one function. In my immediate “use case” I want to have a control box that supplies power and has two knobs to control my remote antenna tuner. I might even add a little LCD to give feedback from the tuner – like what offset the L and C Stepper motors are at. If I were…

Sainsmart TB6560 Stepper Drivers

While Adafruit has some nice driver boards for Nema-17 Stepper Motors, my Nema-23 motors have a higher current rating. This seems to mean that Arduino is my only option at this point. I’m more than fine with this since its a dedicated project that will sit in a box out back. Here is one of many decent video’s. He uses a 24v power supply,…

Palstar BT1500A Schematic and My Switching Arrangement

I’m not exactly sure I understand how to read this schematic, but for all bands, the relay switching that I have going on is >50 ohms, LP or the UP position(Hi-Z) -which by default has the 65 pf engaged at the output – and then the Low C, where the larger 960 pf capacitor is taken out of the circuit. The resulting circuit looks…