Modify a Auvio 33-281 for use with AT Pro

[wingryder]

Trying to go wireless with AT Pro.

I see lots of guys using the Auvio33-283 from Radio Shack. Works good for the price. I have a working Auvio 33-281 I would like to modify. It is the model that the transmitter is housed in a small console and used around the house. Not afraid to tear the console apart and see if I can "breakout" just the transmitter to mount it on the detector.

I also have two transmitters that are for this "portable" purpose from the model 33-284. They do not work with the 33-281 so might use them as "housing" for the project.
Not afraid of a soldering pen... or of killing the working model either. I never use it.

So if you are not too confused. Anyone been into one of these "desk" type transmitters?

thanks
wingryder

 

[wingryder]

Also if anyone has any information about frequencies used on these models and if they can be changed that would be helpful. I think the two "small" transmitters I have both work they are just on the wrong freq.

In the meantime I will keep looking for a working set of 33-283's.

wingryder

 

[William-NM]

I wish I could help you, wingryder. I had a pair of the 33-284 wireless ear buds and liked them pretty well, but they stopped working after a few months and I don't have the know-how to fix 'em.

I like a brimmed hat to protect the remaining brain cells from the New Mexico sun, so I'm running with the 3.5mm adapter and either a pair of Klipsch S4-I earbuds or polk Audio Ultra Fit 2000 behind-the-neck 'phones. Just depends on which one is in the soldering basket at the moment. I've taken to putting a couple of .94 cent coiled extensions in line. Now the snags usually just unplug them. I pick them up on ebay, they're about a foot long coiled.

I'd love to be running wireless again - hope somebody brings a durable set to market one day soon. Best of luck with your project- I hope someone knowledgeable can answer your questions and that you'll let us know how it's going!

 

[xwyokid]

Wouldn't it be wonderful if an audio company would jump in mass produce wireless systems for metal detectors. I've e-mailed several, posing such a question...The response has always been, not enough market interest.

 

[tincanalley]

I removed one of these from the housing and then found a simple circuit to replace the build in battery for it. I installed it inside my CZ6 and with the circuit added, it runs off of the 9v. batteries. I don't have to recharge the original battery now and the 9v. batteries show very little loss running the wireless transmitter. The lithium battery inside is around 3.5-4.5v if I remember correctly. The voltage reduction circuit I found was just a 3 or 4 components and was able to mount them where the lithium battery had been. It was tedious work but I enjoy the wireless headphones now.

I had two of these and took apart one of the headphones to try and put them in a better headphone set, but damaged it in the process. I like the set up now as I don't have wires and things hanging on the outside of my detector to get hung up on things. The headphones work okay, but I would probably use headphones with better isolation in noisy envirements such as the beach when the waves were rough and loud. The only thing that showed up was a faint high pitch hum in the headphones all the time, probably from disturbance from the detector electronics. It's very faint and so I don't notice it unless I'm paying close attention.