AMERITRON AL-1200 Bedienerhandbuch

Modifications to the Ameritron AL-1200 AmplifierW8WWV - Modifications to the Ameritron AL-1200 AmplifierGreg Ordy● Introduction ● EBS-1 Electr

Modifications to the Ameritron AL-1200 AmplifierRelay board mounted in upper rear corner of center divider.Close-up of relay board. New 24 Volt DC Sup

Modifications to the Ameritron AL-1200 AmplifierThe second part of the modification involves providing a 25 to 30 volt DC power source for the relay b

Modifications to the Ameritron AL-1200 Amplifiercontains a terminal strip with the full-wave bridge rectifier, and a large filter capacitor. I also pu

Modifications to the Ameritron AL-1200 Amplifiermajority of the 12 volts goes through the combination. So long as the LED is driven with 20 mA, and ha

Modifications to the Ameritron AL-1200 AmplifierIf not, I will be back working with those LEDs, since they really are the way to go.EpilogueModifying

Modifications to the Ameritron AL-1200 AmplifierFactory Installed New Relay Board (courtesy of K5JP) Relay Details (courtesy of N5TML)I was very glad

Modifications to the Ameritron AL-1200 AmplifierThis approach would seem to fix my only issue with the LED, which was the uneven illumination pattern,

Modifications to the Ameritron AL-1200 AmplifierFor some reason, this amp, and the Ameritron AL-811H I owned before it, seem to blow out meter bulbs e

Modifications to the Ameritron AL-1200 AmplifierEBS-1 Electronic Bias and Replacement Relay BoardsThe boards are shown on top of 1/4 inch grid paper.

Modifications to the Ameritron AL-1200 AmplifierEBS-1 Electronic Bias SystemThe unmodified AL-1200 uses a pair of mechanical relay contacts to supply

Modifications to the Ameritron AL-1200 Amplifier20 60 180 42030 45 135 31540 30 90 21050 26.25 78.75 183.7560 22.5 67.5 157.5Times above 150 mS are sh

Modifications to the Ameritron AL-1200 Amplifier I chose to add the EBS-1 modification before the relay board modification. It seemed like the safer a

Modifications to the Ameritron AL-1200 Amplifierand attached to the board. The fourth and last wire connects from the bias board back to the now uncon

Modifications to the Ameritron AL-1200 AmplifierRelay BoardAs of the time of the creation of this web page, the updated relay board was a relatively n

Modifications to the Ameritron AL-1200 AmplifierIf the EBS-1 modification was algebra, the relay board modification is graduate advanced calculus. The