µTracer 3+ lid drilling

printed sticker drill template on polycarbonate

3mm through holes, 3.5x2mm sunk holes and 10mm through holes for Lorlin CK1029, 18.3mm through hole for 9 pin vacuum tube socket, 25mm through hole for 8 pin vacuum tube socket with 35x2mm sunk hole.

follow the whole build here: µTracer 3+ build

µTracer 3+ build 8

Part 8. grid bias circuit construction

Part 8. grid bias circuit testing and calibration

measuring -12.64 Volt regardless of Calibration slider after making one mistake
I put D21 (HER108) in the spot of D12
during step C9 I found out (because I had 2 more items left instead of 1)

I unsoldered HER108 and put in D21 and then put the correct 1N5934 in D12

follow the whole build here: µTracer 3+ build

µTracer 3+ build 6 & 7

Part 6. heater supply testing with Hakko FX-888D and 5 DIOPTRE VTLLAMP10N

Part 6. heater supply construction
Part 6. heater supply testing
Part 7. negative power supply construction
Part 7. negative power supply testing

follow the whole build here: µTracer 3+ build

µTracer 3+ build 3

Part 1. the GUI installation
Part 1. the GUI testing
Part 2. RS232 connector cable construction
Part 2. RS232 connector cable testing
Part 3. voltage regulators construction
Part 3. voltage regulators testing

follow the whole build here: µTracer 3+ build
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tree trunk, battle ship, battle cruiser, nuclear submarine, destroyer

-PC Status: Overall this PC is performing above expectations (70th percentile). This means that out of 100 PCs with exactly the same components, 30 performed better. The overall PC percentile is the average of each of its individual components.
-Processor: With an outstanding single core score, this CPU is the cat’s whiskers: It demolishes everyday tasks such as web browsing, office apps and audio/video playback. Additionally this processor can handle typical workstation, and even moderate server workloads. Finally, with a gaming score of 90.6%, this CPU’s suitability for 3D gaming is excellent.
-Graphics: 70.5% is a good 3D score. This GPU can handle the majority of recent games at high resolutions and ultra detail levels.
-Boot Drive: 121% is an exceptional SSD score. This drive is suitable for heavy workstation use, it will facilitate fast boots, responsive applications and allow for fast transfers of multi-gigabyte files.
-Memory: 32GB is enough RAM to run any version of Windows and it’s far more than any current game requires. 32GB will also allow for large file and system caches, virtual machine hosting, software development, video editing and batch multimedia processing.
-OS Version: Windows 10 is the most recent version of Windows, and the best to date in our opinion.

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Electro-Voice TL806

The Electro-Voice TL806 low frequency loudspeaker system is a vented-box (bass-reflex) design with gross internal volume of 1.3 cu. ft. (36.8119005696 Liters) The system has been designed for use with the Electro-Voice EVM12L 12 inch loudspeaker. The usable frequency range of the TL806 is roughly 60 to 1600 Hz. The efficiency of the TL806 is 6% (half-space load, 100 to 800 Hz, 8 ohm nominal impedance) and as a result will generate outputs of 6 acoustic watts at the rated input of 100 watts.

The design provides a selection of two different low frequency response curves by the optional use of a removable port cover. In the normal configuration (port cover off) the response is flat down to the lowest possible frequency. In the step-down configuration (port cover on) the response exhibits a sloping gradual low frequency rolloff but with about a one-half octave extension of low end response. The step down mode of operation is intended to be used with simple before-the-power-amp equalization to flatten the response (only 6 dB maximum boost required, equalizer details available on request).

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DIY nut files from feeler gauges

  • 010=0.254mm
  • 026=0.6604mm


From 1964 to now, the GHS Boomers® series has been the flagship set of GHS Strings. Used by musicians in every genre, the Boomers® have shown to stand up to any playing style. Now known as “The Power String”, GHS Boomers® continue to make their mark on music across the world. The roundwound guitar set is made with Nickel-Plated steel wrapped tightly around a round core wire. The combination provides the string with its bright characteristic and long-lasting tone.