Posts filed under: Collectible Stuff

J&K Audio Design Custom Power Transformer

I have spent quite a lot of time to find a good transformer maker who can build something “beyond ordinary”. That means something standard (or a bit above standard) is no longer interest me. I spend hundreds of emails to...
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Repairing Broken Peerless/Tymphany P830985 Full Range Driver

I got this Tymphany driver from broken Bluetooth speaker. First, I don’t expect I would see anything special inside a broken Bluetooh speaker. But I’m wrong. The driver used is Tymphany (Peerless) P830985. I believe the name/numbering format is following...
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Another Comment of ‘No Name Capacitor’ from DHTRob.com

First, I need to say sorry because I haven’t updated this blog for quite some time. Crazy busy with my daily office life. I have some good stuff on hand, but unfortunately don’t have much time to take picture and...
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HP (Agilent) 8903B: Audio Analyzer / Distortion Meter

This is one of the measurement device that has been on my list for a while, it’s HP/Agilent 8903B distortion meter (well, Tektronix AA501 is also on my list). It’s a solid unit with combination of low distortion oscillator and...
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HP (Agilent) 5328A: Universal (Frequency) Counter

In order to have better view (and better understanding) of how stuff works, especially in audio, I need to have more testing equipments. Unfortunately, those are quite expensive for a person who is doing this as hobby – like me....
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Salvaging Some Parts from Old Marantz PM400AVK

Long time no post. Quite a busy months. Let’s start with a simple one. All photos were taken with my Nokia Lumia 1020. I was too lazy to use my DSLR for this purpose ;-). During some ‘cleaning house’ session...
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Shuguang 300BS-B Ceramic Tube Socket

This is quite common tube, 300B by Shuguang. Nothing really special, only white ceramic tube socket, gold plated pins, and carbonized nickel plate. Let’s see how interesting this tube when the filament is powered. The perforated design is interesting than...
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F5T (F5 Turbo) PCB

This is indeed a nice F5T (F5 Turbo) PCB. Well designed one, good option and flexibility, and surely good quality fabrication. Time to shop for the parts? 😉...
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TCXO Module from D/A Mental

A bit tough later these days to find a good reclock module. Somehow, I was interested to try this one: TCXO Module from D/A Mental (a bit strange name, huh?). The specification is quite promising, like below: Frequency : 22.5792MHz...
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Seeing in Big Picture…

Not really a DIY activity this one, but just a break with another hobby: photography! I believe we are familiar with a lot of tubes, but sometime we never see the detail what’s inside. From this moment, I will start...
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Potting Scientific Conversion SPDIF Transformer

After first part here, I think it’s time to experiment more with this SPDIF Transformer. What could be worst than potting it into a custom enclosure? Nanana, I can’t even imagine… Below is the final result: The potted transformer vs...
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Mounting Scientific Conversion SPDIF Transformer

Scientific Conversion SPDIF Transformer is quite unique. The appearance is 8-pins SMD, but the footprint is nowhere on the 8-pins SMD one. I have tried BrownDog PCB to mount, but it just doesn’t fit (or I pick wrong PCB). But...
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