I might have suggested rat-shack years ago. Their selection is small to non-existant these days, as they try to establish themselves as a cell phone and satelite TV outlet store. Lotsa-luck to them (they'll need it)!
All of the Radio Shack stores in Jacksonville have sent all of their CB, ham, OTA TV, electronic repair parts, tools, etc. and other "excess" to a single store in the area that will specialize in what Radio Shack used to be famous for... only not so much of a selection any more! I'd have to drive to Gainesville for any real selection of CB or ham gear!
BTW, a 4-ohm speaker works well on a 3.2 ohm system. Sometimes requires a slightly higher volume setting, is all. Even a 8 or 16 ohm speaker won't hurt the system, but the volume might not be adequate. Don't waste money on big magnets or high wattage speakers, as they don't help aircraft radios that lack the audio power to drive them properly.
The Quam listed in the chiefaicraft site is round -- 4-inches diameter. Anyone know of an oval Quam speaker that would fit in my plane. I assume it would be necessary to use an adapter plate of some sort...
CAUTION !!!! I had a vertical compass installed and they had real difficult getting it alighned. Finally, after lots of $hours found the overhead speaker had been replaced with one with a big magnet in it. Removed the speaker, the compass alighned.
CAUTION !!!! I had a vertical compass installed and they had real difficult getting it alighned. Finally, after lots of $hours found the overhead speaker had been replaced with one with a big magnet in it. Removed the speaker, the compass alighned.
Joel Kiester
Interesting. Someone else wrote about the hazard of installing a speaker with an oversized magnet. I just had my compass replaced and spun (cost $$$). I don't want to screw that up.
Maybe the Quam speaker is suitable for aircraft, and does not have an oversized magnet?
Here's another option I am considering: the speaker I have works OK -- it's just that the cardboard diaphram is deteriorated. I wonder if the existing speaker could be repaired by a speaker repair specialist, by replacing the cardboard diaphram?
In a pinch....if you ever have the unfortunate chance to put your finger through the cardboard speaker, smear some wood glue along the cracked cardboard with your finger or a stiff brush...and let it dry.
It'll be nearly as good as new.
I'd be happy if no one asked me how I learned that...
Gary Shreve When writing the story of your life, never, ever let someone else hold the pen. [Linked Image]
Here's another option I am considering: the speaker I have works OK -- it's just that the cardboard diaphram is deteriorated. I wonder if the existing speaker could be repaired by a speaker repair specialist, by replacing the cardboard diaphram?
I've seen automotive restorers that will re-cone a speaker on vintage cars. I don't have any specific links, but do a search on "speaker reconing" and you'll find lots of services and kits available. Most likely you'll find someone fairly local.
Attached are photos of the speaker I removed from my '68 C-150H. The entire diaphram is gone. No wonder it sounded "tinny." It's "Utah" brand (an Indiana company defuct since the 1980s). No repair kits available that I can find. Dimensions are 6.5 x 8.5 inches (mounting holes 6.75 x 4.5 inches apart).
The 4 x6 Quam oval speaker from AC Spruce will require fabrication of an adapter plate. I see that Shelby did this exact thing, probably with this exact same replacement speaker:
