While trying to get my AH4 compatible tuner to work...I think I killed something on my HL2...

[Ramsin]

I measured twice, cut once....only the measurements were wrong.

I followed everything on the Wiki, which was right. However, the pinout diagram that I found on Google for the AH4 had Key and Start reversed...it would be my luck to go with the ONE wrong image.

After correcting my mistake (thank to one of Antonio Reina's posts on this group), I hit tune in Thetis, and the wattage from the HL2 drops to zero, and nothing happens until I unselect "tune", then the tuner clicks once....that's it. That's all that happens.

Any idea on what I might be doing wrong?...or worse yet, what I killed?

[Ramsin]

Wellll....apparently I should've measured thrice...

I had accidentally put a 10k ohm resistor in D2 instead of R16. Could this have done damage?

[Steve Haynal]

Hi Ramsin,

I don't think a 10K resistor would cause this damage. I recommend stepping back and seeing if your HL2 transmits as expected into a dummy load without any tuner.

73,

Steve

kf7o

[Ramsin]

Sorry Steve, it appears that the schematic on the github isn't compatible with the LDG AT-7000 tuner. I used Antonio's schematic and all is well now. I will try to update the wiki, once I remember how...

[gareth]

Hopefully you will get everything up and running again. I have the LDG AT 600 Pro II autotuner and the io board with no brain power to link them up. Apparently it is AH4 compatible also. So yep im watching and learning.