Ultra Probe – Page 3 – Test Equipment

mike zahorik · 2025-06-12T21:26:39Z

For the past few months I have been building an Ultra Probe. I have little experience with surface mount stuff, but have been giving it a shot. The circuit boards (for the amp and probe) are just my second attempt at toner transfer. The probe CB came out perfect, but the amp PC had some filled drill holes and a trace that was missing. I just soldered a #30 AWG wire in place of the trace. I've been using my 25 watt iron to solder in the parts. Feels like my 300 watt American Beauty, but works for the most part. I did have 3 or 4 bad solder joints and I did melt one of the little red LED's. Made a box and installed the speaker, controls, switches and board, but had no room for the batteries (speaker too large). So, I placed a phono jack on the side and plug in the batteries that way. I didn't have a switch on the VR anyway and didn't want to purchase one. Tried the toner transfer to shipping label, worked pretty good. In the old days I used dry transfer lettering, works about the same, except you have to make your program to the correct dimensions. That took a few tries. Well got the box closed up and powered up, takes about 20 ma, seems OK. Then I placed a 6 inch wire into the BNC connector and with the switch on detect, I could receive every radio station in the area, all at once, with tons of volume. Started on making the probe, but that will take a few more days. Let you know.

Mr Carlsons Lab

(@mrcarlsonslab)

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@samplegod

Yes, private message Paul directly on Patreon with the attachment number you’re interested in!

Mr Carlson’s Lab Admin

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Posted : 08/01/2026 8:08 pm

Ovi4

(@ovi4)

Honorable Member

@samplegod Hi, yes. You need to contact him via the PM system following the procedure as described on the link (i had provided earlier). The rule is that when you need some documentation for a particular project you need to ask for it even though in the video might say the attachments are found below the video. The reason is that the attachment were there to begin with (when the video was first published) but…. they were only there for a limited time after which they are taken away and if anyone needs them you then need to specifically ask for it (via the PM as explained in the provided link) it is the only way.

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Posted : 09/01/2026 2:38 am

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