I built a little amp and used a transformer from a phone systme, it works fine but there is some hum, is there a signifcant distance the power transformer should be from the amp, mine is one inch away, also are there transformers with grounded shielding like a metal cover?

I saw one of these on Ebay, already on the small board claiming up to 100 watts and for under $4 shipped, so I gave it a try, it was my first time putting something like that together but the cost was next to nothing, I used a center tap transformer that I already had that gave me about 17 volts each leg, for a preamp I'm just using a Digitech Genesis 3 which does it all, equalization, modeling (if you want it) and effects, I'm running it into a BW 1502 at 4 ohms. I am impressed! This little thing has quite some volume even with a transformer not designated for audio and on the low side as far as voltage. I'm a 66 year old guy and don't like loud volume, just here in the living room with a steel guitar so this is more than enough. Is the TDA 7293 a favorite for these little amps or is there even something better, I'm curious about class D now

looking to buy a good bang for the buck 40-75 watt single 12", no effects or modeling needed, like a clean sound, light weight, small size a plus

Hi, a new member, steel guitarist so lots of SS amps, mostly Peavey 200 watt range with 15" speakers, but now at 66 years old and a disability I'm looking light weight and don't need high wattage, I found this Crate 65 watter with a 12", the ad says it has a hum, does anyone have or know of a schematic for this amp, or know anything about them, it's completely new to me, thanks, glad to be on board