Agri Microelectronics

20/08/2026

These two hotline Gemini electric fence energisers were sent in by a customer. One unit had poor output and the other was a 80 and the customer wanted it upgrading to the output of the 120. Both units are now repaired and both have new output transformers. Have a unit that needs repair ?, link is in the bio

12/08/2026

This hotline Gemini electric fencer was sent in by a customer for repair. At first I just thought it was an SCR problem, as it wasn’t discharging at all, but just whistling. This means it’s making the high voltage (the fly back is whistling), but isn’t discharging it. I removed the SCR and it tested ok, so I traced the fault to the trigger transistor which triggers the mosfet gate. Once this was replaced it was back working. The output was very low though, so next the output transformer was replaced, after tweaking the pots for the output I was about to get it to 9.3kv , so ready to be deployed back into the field again. If you need a fencer repairing, get in touch !.

30/07/2026

This mole valley B410 electric fence energiser was sent in all the way from Cornwall as it wouldn’t work. Can we fix the problem and get thier electric fences back in business again ?.

12/01/2026

This Gemini 120 electric fence energiser was sent in for repair. The output was only at 1kv and it clicked very quietly, which is a classic symptom of low output. It was taken apart and diagnosed to be a failed output transformer, which is very common on these fencers. Once this was replaced it was back to a healthy output of 8.8-9.1kv . If you have a fencer that needs repair get in touch.

This Gemini 120 electric fence energiser was sent in for repair. The output was only at 1kv and it clicked very quietly, which is a classic symptom of low ou...

31/10/2025

Keeping the classics going !, these things are significantly more repairable than any modern fencers !

11/07/2025

Repairing a Voss Farming Helos 4 Electric Fence Energizer – Common Faults and Fixes

In this video, we take a look at the Voss Helos 4 electric fence energizer, a unit known for two common issues: water ingress down the power cable and a frequent failure involving a shorted gate drive transistor. I’ve seen these faults across multiple units brought in for repair, and I’ll walk you through the diagnostics and repair process step by step.

If you’ve got a faulty Helos 4 or another electric fence energizer that needs attention, feel free to get in touch via www.Mobileithelp.co.uk.

https://youtube.com/shorts/oduhqxeyhTE?si=EJZkl0nix2bl5MUF

Repairing a Voss Farming Helos 4 Electric Fence Energizer – Common Faults and FixesIn this video, we take a look at the Voss Helos 4 electric fence energizer...

11/07/2025

Large box of energisers all but one fixed !.

03/07/2025

Esb 202 repair sent in by a customer. This one was showing low voltage on the led when in use and would pulse intermittently.
Strangely when it did the output was normal.
Under the pulse transformer runs the gate pulse line that fires the SCR. Water had gotten under the transformer and corroded the line to about 0.1mm thick, so it was barely thick enough to provide enough current to the gate to trigger the SCR.
This trace was repaired, I then realised the resistor on this line was also corroded to death, so replaced this too and it was pulsing normally then.
The output cap ESR was off so the output cap was also changed.
The unit is now back working properly again and giving full output and now reality turns on first time instead of like before where it would take 5 mins to even begin pulsing properly.

13/05/2025

Hotline Gemini 120 electric fence unit repaired

07/02/2025

Full video as Facebook chops the end off

In this video, we diagnose and repair a Rutland ESB202 electric fence energiser that wouldn’t turn on. We go through step-by-step troubleshooting, identifyin...