Monday, July 11, 2016
Monday, June 20, 2016
Sunday, June 19, 2016
Monday, May 16, 2016
Monday, May 2, 2016
VPI 16.5 - New Housing
I got this machine in the early 90s from Steve at Angela Instruments when he upgraded to a more deluxe unit. It was originally a VPI 16 (note the traces of the lid mounted vacuum nozzle), surplus from Towson University Library. Eventually the turntable motor burned out and when I placed an order for a replacement motor, I also opted for the ".5 upgrade kit".
After 8 years in the tropics, the particle board housing started to rot due to extreme humidity. So I took it apart, labelled the wiring and took pictures for easier reassembly.
I enlisted the help of Joey's woodworking shop foreman, Badjo, to duplicate the original using higher quality phenolic plywood.
This is the new box in its final reassembly phase - vacuum motor installed, turntable motor, platter and switch plate next.
Good for another lifetime?
Saturday, April 30, 2016
Saturday, April 9, 2016
Stereo > Mono Line Level Mixer - ***Revised 4/12/21***
Mixing line level stereophonic signals into full dimensional monophonic ;)
Here's a DIY project for mono aficionados that's so basic, I should have uploaded it many years ago. But other things got in the way.
Just like an MC step-up, these are entirely passive devices.
Wednesday, March 9, 2016
1" compression drivers - Emilar, Renkus-Heinz and Beyma
Is there life after Altec?
My first encounter with Emilar and Renkus-Heinz was in a discussion at the Lansing Heritage forum in 2006. Apparently, Jonas Renkus was a principal at both companies in the 70s and 80s. Prior to co-founding these companies, he worked under John Hilliard at Altec Lansing and followed him at Ling Temco Vought (LTV) where they developed a new compression driver with a polyimide suspension aluminum diaphragm. A paper on this research was submitted to the Journal of the Audio Engineering Society in 1966. This association piqued my interest, which triggered my search for affordable Emilar and Renkus-Heinz drivers.
Saturday, February 27, 2016
Austin Mini Maintenance Woes
As soon as I got the brakes sorted...
...I had the exhaust leak fixed.
In preparation for the summer heat, I installed the
heater matrix
to function as an auxiliary radiator.
I was about to take out the clutch master cylinder
to clean up the rust, but it was too late.
Now I have to wait a few weeks for a replacement clutch master cylinder ;(
Tuesday, February 9, 2016
Listening Room - JE Labs
I started this blog in 2011 and overlooked the fact that I haven't posted details of my systems. Visitors who remember the defunct site will be familiar with most of the components apart from a change in venue.
Saturday, February 6, 2016
Altec 32C horn redux
Three years ago I replaced the Altec 811 horns with Altec 32C horns in my 2-way speaker system. I think I now have an unscientific explanation as to why I've been enjoying the Altec 32C.
Friday, January 29, 2016
Canon P DIY/CLA
After developing my negatives from our Tokyo trip, I noticed a thin band of overexposure on a few frames I shot over 1/125, as seen in the two pictures above. Eventually, I also lost speeds below 1/60. These were indications that the curtain drum and rollers where dirty, dry or both.
So I downloaded and studied the service manual. This manual is just a reverse engineering illustration of how the camera was built. There are no instructions on how to service the camera.
Even if I've had previous experience restoring a Leica II and a few Feds and Zorkis, I ruled out dismantling the shutter mechanism on this more complex camera. I didn't even consider adjusting the shutter tension. My main objective was to gain access to the curtain drum and rollers which were blocked by light baffles so I could flush them with Naptha and then re-lubricate. After this procedure, 1/125-1/1000 looked much better on the CRT screen shutter test. I loaded a test roll.
Test shots after DIY/CLA
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| @ 1/1000 |
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| @ 1/500 |
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| @ 1/250 |
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| @ 1/15 |
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| @ 1/500 |
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| @ 1/1000 |
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