For being 39 years old, this amp is nearly spotless inside. I’d venture to say it may have been opened once before I inspected it myself. Keep in mind that … Continue Reading More Sansui AU-517 Internal Shots
To my surprise someone donated a Sansui AU-517 to me for free, thanks again for that! Here we have a stereo amplifier that weighs in at 40lbs! This behemoth is … Continue Reading First Amp Donation! Sansui AU-517
Once again the values needed for the power to the DAC have changed, waiting yet again on the correct transformer.
“It’s the final countdown!” (to the) HiFi Discrete Transistor Op-amp showdown. Burson Audio vs. Orange Amplification Amplification! (DSD256+)
I wanted to give anyone still putting up with my unusually long delays between reviews a sneak peak of what is coming soon! I have everything ready to go for … Continue Reading “It’s the final countdown!” (to the) HiFi Discrete Transistor Op-amp showdown. Burson Audio vs. Orange Amplification Amplification! (DSD256+)
I purchased the entire lot of parts on Ebay for $30 shipped to my door. I had done enough research that I knew of 2 parts in particular that could … Continue Reading 1950’s to 1960’s Hammond Organ ($30) Parts Pull Highlights
Link for PayPal.Me, a new direct fundraising system meant for similar purposes as GoFundMe without the middle man since almost everyone has PayPal.
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.
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%).
Dear Burson Audio and Orange Amplification:
I want to thank both of these companies for being so patient with me over the summer as I pushed through two of the hardest engineering courses so far in 10 weeks! I was hoping to publish the reviews for Burson well before now and be working on Orange Amp's review by now. However that just hasn't panned out due to my school requirements on time.
I most likely will have the time in the next few months to do the detailed and quantitative review style that I have discussed with both Burson Audio out of Australia and Orange Amplification out of the UK. I am very lucky to have the chance to do these reviews and if nothing else, I have had an extra amount of time to listen to the hardware I will eventually review. I say by the end of August I will have two more reviews including video build logs for the 100W x2 MX50 SE + Avel Lindberg's 160VA 22V-0V-22V (DC) Toroidal transformer design which should give an end to the 60Hz buzz so commonly heard on just about any A/V Receiver running on a standard 120V outlet. I will also be using a rectification PSU board linked in my previous post.
Project MXercury-Lindberg 50SE/160VA: At this point I can’t comment on the functionality/performance of the NobSound™ MX50 SE kit, but I wanted to make sure to post a few pictures that … Continue Reading 100W Power Amplifier x2 Design (Mono-block style) + Toroidal Transformer
By: Keith Hallman | July 3rd, 2017 Any law enforcement branch in the United States has to have probable cause or strong suspicion that a person or entity is involved … Continue Reading Kaspersky Labs – A Story of “The Company You Keep”
What a fellowship of harmony it is! These discrete designs from Orange Amp just BARELY fit side by side in the Creative ZXr. Initial Impression: I heard an obvious tone change … Continue Reading Orange Amp + Burson Audio V5-OPA
I was excited to see Orange Amplification’s Dual-DIP discrete op amp arrive!! This looks more like Burson’s previous generations (V2 & V3) with the discrete circuitry exposed. I will be interested … Continue Reading Orange Amplification Review Sample 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!
Really excited to have Orange Amplification reach out to me for reviewing their latest ~$60 discrete op-amps! I was honored by receiving that email and they contacted me through this … Continue Reading Welcome Orange Amplification!
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