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coppercone2:
Small 1A variac. Has fuses and an IEC connector on the back. Needs one more switch on the back, so its possible to isolate the primary when plugged in (I will probobly add a switch + iec this spring). The vents are painted steel grate. One of a few that I have built. But this one is mainly used as a portable source that goes back on the shelf when not in use. And color coding the binding posts is a priority   :-[

I also always wanted to lay in the inside with metal, maybe nickel silver sheet. And a indicator lights for powered and output (which will only work for high settings). Plenty of room for a few things anyway, but that one is not getting meters.


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Kosmic:

--- Quote from: tomud on February 05, 2023, 12:45:57 am ---My old case design for Chinese 150W Constant Current Electronic Load 60V 10A
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Mighty good job with the enclosure, I'm impressed  :-+

rfclown:

--- Quote from: ccktek on November 02, 2022, 07:16:14 pm ---
Trombone air flow meter (2019) ...

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Not that's something I don't have on my bench. Where do you sent it for calibration? I do have a trombone line, but I couldn't find it to take a picture, so I took a picture of a dial phase shifter (same function) and a tuner along with my cornet and trumpet mouthpieces. I don't have any mouth piece to N adaptors though.

dobsonr741:
5 1/2 digit Autoranging DC voltmeter for 150mV...250V. Built with ADS1263. SCPI control over USB.

jasonRF:

--- Quote from: MrYakimovYA on January 29, 2023, 03:38:43 am ---
--- Quote from: jasonRF on January 29, 2023, 12:39:53 am ---This is a ~6 dB,  ~5 MHz amplifier I built with selectable 50 Ohm or "0" Ohm output impedance.

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Nice work! It looks so nice! Could you tell me what is its noise level?

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My scope says about 210uV RMS. This is with 50-Ohm feedthrough on the scope, with the 20 MHz bandwidth limit turned on, and with the amplifier set to 50-Ohm output impedance and the volume control set to max.   The noise level of just the scope is about 160uV RMS with the 20 MHz limit, so the amplifier is at the limit if what the scope can see.  By the way, the scope is a Picoscope 5244B, and I was running it in 16-bit mode at 62.5 MS/s at the most sensitive scale (which is only 2mV/div). 

Jason

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