Restoration Tips & Notes Working with audio media (mostly tape) restoration

2009-10-16

Rechargeable battery solutions: AA and AAA

Filed under: live sound and recording,parts,photography,tools — Richard L. Hess @ 14:22

I wrote about rechargeable batteries back in April 2009 and while I have expanded the installation of the iPowerUS 9V batteries to three chargers and twelve batteries at the church and one charger and four batteries in my facility, I have adopted a different approach to AA and AAA cells from that outlined previously.

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2009-07-14

Sony APR-5000 head assembly problem

Filed under: parts,Sony APR-5000 — Richard L. Hess @ 16:34

I was having slightly intermittent connections on one head assembly on a Sony APR-5000 and was concerned as to the cause because the 78-pin head connectors are essentially unobtanium and a headache to change.

As I installed and de-installed the head, I got to thinking that the connector might not be positioned correctly (i.e. perhaps the wrong hardware had somehow found its way into the connector mounting system.

When I measured the bottom (oriented as if the head were mounted in the machine) face of the connector mounting flange referenced to the bottom of the mounting posts (using a straight-edge across two of them), I discovered that, indeed, this connector was recessed about 25 mils (0.025″) further into the head assembly than several other ones. Adding a 25-mil thick washer should solve the problem.

This is posted in case you’re scratching your head with a similar problem. This is something I wouldn’t have immediately thought of. I don’t know if this was caused by aftermarket work or if it perhaps represents a manufacturing error.

2009-04-27

Rechargeable battery solutions 9V, AA, AAA

Filed under: live sound and recording,parts,photography,tools — Richard L. Hess @ 14:55

Battery technology continues to improve. In 2007, I bought some Sony fast-charge nickel-metal-hydride (NiMH) AA cells and charger. They have worked well for digital cameras, electronic flashes, and a portable audio recorder. NiMH cells are available in major stores and some offer long-shelf-life-per-charge and come pre-charged.

Recently, I did a thorough search for 9 V rechargeable batteries for wireless microphones at church. I was pleased to discover that iPowerUS (they have a Toronto office) was able to provide lithium polymer 9 V batteries that far outperformed the available NiMH offerings. We bought one DC9V charger and eight DC9V-520mAh batteries for alternate use in four wireless transmitters that we use regularly. We expect this system to pay off in a year or less.

I also bought their GC-60 tester/charger for my NiMH AA and AAA cells which, so far, looks excellent. Both chargers come with a “wall wart” and a car cord.

See updates in this article.

2008-12-13

Microphone (XLR) connector history

Filed under: infrastructure,live sound and recording,parts — Richard L. Hess @ 18:24

Ray A. Rayburn has just updated his page on the XLR microphone connector and its antecedents. Very interesting. While not a major issue in tape recorders, it is in studio practice and for microphone collectors.

2006-03-17

VCR Repair Information

Filed under: parts,video — Richard L. Hess @ 22:34

Thanks, Jim, for pointing out this site that offers repair notes and replacement parts for VCRs.

http://www.fixer.com/

2006-03-15

Round-pin power cords for older equipment using PH-163 connector

Filed under: parts,power — Richard L. Hess @ 00:07

The round-pin power cords used on older Hewlett-Packard and Dolby equipment  uses a connector called the PH-163.  

The round-pin power cords using the PH-163 connector come in two versions. The difference between the two versions is that the hot and neutral are reversed. The ground is always in the same centre position. (more…)

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