|
Audio Asylum Thread Printer Get a view of an entire thread on one page |
For Sale Ads |
74.69.64.179
This little TDA7297 chip amp is doing good and substantial work. I love the sound and the imaging. At 15 watts per channel it is more than enough to drive my floor standing Nightingales.
The TDA7297 was under six bucks, delivered, from China and has been slightly modded with better capacitors. I power it with an Astron power supply.
My big boy amp gets little attention these days.
Follow Ups:
And where do I get the power supply?
Search eBay or go to Newegg. There are two versions: A and B. One has a jack for the power input, the other has a block with two mini screw downs for the two wires from a power supply.
My Astron is powering it with 13.8 volts DC. IIRC, you can go to 15 volts DC. Some folks are using a hefty wall wart for power. YMMV.
The link below is a thread from a group that's been modifying the TDA7297. I found it very helpful.
Good luck.
3 bucks with super delayed delivery. Arrives December sometime after I forgot I ordered it. It's the one with the plug not the two screws.
I'm hoping it likes my Horneshoppe Horns
That is less than minimalist, it's missing parts!
My very first minimalist AM radio consisted of a 1N34 germanium diode, wire antenna, ground rod, and high impedance earphone. The only station it picked up was KFI (I lived in S.CA at the time).I later added a 2N107 'hobbyist' germanium transistor to make it louder and drive more difficult headphones.
Conceptually very similar with what is shown here but mine was built on
a small flat piece of wood with nails to support the few components and connections
Edits: 11/06/15
I built a few of those germanium diode radios, too, using the cardboard tube from a roll of toilet paper to wind a coil of bell wire. From there it went to ham radio and more than a few homebrew QRP rigs for 80 and 40 meters. Then speakers and a phono pre-amp. It all has helped me to stay out of trouble, I think.
Interesting. I got my ham radio license a few years later and played around with CW transmitters on 40m and 15m. The only 'higher-end' receiver I built was a regenerative receiver that drifted and squealed if not adjusted just so. ;-)You mentioned powering your TDA7297 amp with an Astron power supply. That brand has been around for at least several decades. I have an old 12v 20A unit in storage down in the basement.
Edits: 11/06/15 11/06/15
Post a Followup:
FAQ |
Post a Message! |
Forgot Password? |
|
||||||||||||||
|
This post is made possible by the generous support of people like you and our sponsors: