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Matt kd4pbs · 7th Mar 2021, 4:15 am

The odd thing is that the one on the output of that filter that wasn't lifted also reads ~2K. Since it's looking usable on the VNA I will probably leave it alone. Underneath those traces that lifted the NiCr layer was still there as Lex described.
If you look closely, everywhere that the gold traces came off, where it was under the blob and where I screwed it up, has the grey NiCr that comprises the resistors. I even tried to scrape away the NiCr layer with a knife and it would not come off.
Oh, I meant to mention, I think the traces might be a 100% gold alloy. I don't think it's plated copper. It's gold on both sides.

7th Mar 2021, 4:15 am	#77
Matt kd4pbs Tetrode Join Date: Mar 2021 Location: Raleigh, North Carolina, USA. Posts: 62	Re: Spectrum Analyser TR4172 The odd thing is that the one on the output of that filter that wasn't lifted also reads ~2K. Since it's looking usable on the VNA I will probably leave it alone. Underneath those traces that lifted the NiCr layer was still there as Lex described. If you look closely, everywhere that the gold traces came off, where it was under the blob and where I screwed it up, has the grey NiCr that comprises the resistors. I even tried to scrape away the NiCr layer with a knife and it would not come off. Oh, I meant to mention, I think the traces might be a 100% gold alloy. I don't think it's plated copper. It's gold on both sides. Last edited by Matt kd4pbs; 7th Mar 2021 at 4:25 am.