Nobsound MS-10D MKII Tube Amplifier Dead Teardown

[@unhappypete2450]

My amp came with a 220 volt input power transformer, that had to be changed to a 120 VAC type. The amp requires : + and - DC voltage for the solid state power amp circuitry. AC heater voltage for its lit tube effect. And adequate AC voltage to power the 5 volt DC regulator / USB / Bluetooth stuff and the speaker output protection circuitry, an additional 2 separate sets of windings. I had an old, (1996), Emerson HT-200 stereo/surround sound amp that had a nice mu-metal shielded PT that after installing, seems to be working great. The transformer is a little bigger and heavier and it did power 2 STK-4132 II stereo power amp modules rated at 20 watts per channel each in the HT-200, so its secondary voltages are in the same neighborhood with likely alot more current capability. I also replaced the wimpy power cord and made a jumper connector with 2 - 4.7 mfd. @ 35 VDC capacitors that plugs into the 7 - pin socket on the power amp PCB, routing the audio back that usually runs through the tubes. Now the 7 conductor ribbon cable is no longer plugged in and is neatly tied aside. The existing 2 amp mains fuse seems to be holding fine !

[@timka880057]

Chassis is good, I'd love to see those nice color coded cloth, point to point wiring, new output transformers, I don't know if dual KT 88s per side would fit, have to change the sockets.

[@THEtechknight]

The trouble is the room for the Iron to run all that. I think EL84 might be the max I could do with this unless I change the top plate and redrill everything. (Something I dont really do, not a fabricator)

[@CoquiAudio]

that chassis wound be nice to point to point circuit with real tube amplifiers circuit with EL34's push pull or single ended :)

[@joelbrandon6807]

pro tip : you can watch series at flixzone. I've been using it for watching lots of of movies these days.

[@omarimordechai8589]

@Joel Brandon Yup, have been watching on Flixzone for months myself =)

[@cashewcrunch]

it has been tampered already. hard to comment if worth to buy one.

[@THEtechknight]

Not hard at all. It didn't appear to be tampered with because most of the screws I had to "crack" loose, which means they were still in their factory positions. This thing is pretty much bottom of the barrel junk from years of experience of working on audio gear.

[@uxwbill]

Fix it, and sell it on down the line. The cabinet's not that great. I'd be willing to bet the tubes are for little more than show.

[@THEtechknight]

That's what im starting to think at this point, I dont need another "project" in an ever long lasting list of projects. At least I got my WeatherSTAR stuff out of the way.

[@Richie107]

@@THEtechknight Love your Weather/IntelliStar videos.. Would like to see the Intellistar you showed earlier actually working and getting data you provided..

[@cashewcrunch]

maybe a hybrid.