In order to verify the vintage capacitor collection I slowly attained all perform to spec, I started to look for capacitor analyzers. The most well known is the Sprague TEL-OHMIKE … Continue Reading Cornell Dubilier BF-50 Capacitor Analyzer
Once again the values needed for the power to the DAC have changed, waiting yet again on the correct transformer.
This is the new method I am using to not only ensure the quality of solder joints, but also verifying vintage items that are not easily read or seen. Especially … Continue Reading Soldering Irons and Microscopes
Various high quality pictures of this rare Amperex Holland 7308 Bugle Boy
It’s finally time to rip that CRT 100 MHz Oscillscope a part just to see what is inside this well known affordable scope for entry audio work. I find more than a few surprises, including multiple pots mounted up to 11″ from the knob on the panel.
“In 20 years of tube collecting and tube selling, this is the FIRST real Bugle Boy 7308 I have ever seen! It appears your tube was originally imported into Canada, as it has HOLLAND etched into the glass at the top. This was standard for all Philips/Amperex tubes that were imported or sold in Canada. It is just possible that for some reason the Bugle Boy labels were only sold in Canada? The Holland name sandblasted into the glass is only seen on Dutch Philips or Amperex tubes coming out of Canada.
I think, due to the extreme rarity of a real Holland made and date coded 7308 Bugle boy, that 99% of those you actually encounter are fakes from Richardson Electronics. Your pictures do reinforce some facts that still tell the real thing from the fake: The fake 7308 or 6922 tubes NEVER have date codes or production codes on them. Yours does, so I will concede that you have one of the very few real Bugle Boy 7308 tubes in existence.” – Brent AudioTubes.com/6dj8.htm
LCD module for Q8 v2.2 ESS ES9018-9038 DIY board had the header pins break during a fix. In the end my fix is more stable than that plastic/metal combo.
Here is my first try at a meaningful picture collage to give viewers some update on my progress. However, my work has passed the points shown here now, but you … Continue Reading Pic of Preamp Demolition. Also the ESS ES9028Pro DIY build + Amanero (DSD512 I2S native) Arrived!
Updates on both my custom/DIY amplifier AND DSD capable DAC w/ DSD512 Native (Amanero + TCXO). This will be the hardware I am using to do my reviews for Burson Audio and Orange Amplification (mainly the DAC due to 4 positions open for op-amps). Stay tuned for incoming full reviews (after I build the DAC 100%).
10x J.W. Miller 10mH Inductors (Extech 380193 LCR Meter) + Avel 160VA Transformer arrives!
Extech gifts me a data acquisition cable for my 380193 passive LCR meter!
First off I want to thank Burson Audio for being so patient with me as I finish up my Jr. semester in EE. I am really excited about the next … Continue Reading Hardware Update and New Tools!
Completed all digital logic circuits on one breadboard and added additional LEDs so you can watch the input/outputs change live with the DIP switch settings. Excited to see what … Continue Reading Digital Logic eHW1 Completed!