Millett "Starving Student" hybrid amp - Page 118

I finally got my hands on tubes. I ordered six but they are all different. Perhaps I can post them online and we can swap to make a set?

It's you from OcUK!

Try switching the tubes and listening carefully to which channel it is coming from to see if it follows the tubes. You can try cleaning the contact pins of the tubes with some contact cleaner or isopropyl alchohol. I had a bad tube that would make faint static noises that sound like what you might have. I changed the tube and it was gone, so it was probably a failing tube or just a fidgety one.

aye it is me. just hope my tubes arrive before xmas so i can get this done.

My first diy amp ever! I love it.
Yeah, the knob is always the last to be added on these types of projects, lol.

Very nice punisher, I can't wait to get my tubes so I can build it!

And I can't wait to see how yours turns out :P

so i completed my build but have one problem

i have a temp headphone and set of rca jacks hooked to test things and have it hooked to a cd player for testing

playing back a song is perfect but if i pause, stop, skip tracks i get a really loud popping sound this also happens as things are powering up


any suggestions?

What value caps did you use?

470 uf panasonic fc's all around

Anywhere have the tubes+sockets in stock? I've emailed about 8 places with no luck.

-Also is there a good beginner guide to point to point soldering, I've watched most of the tutorials on tangent's site but that focuses mainly on pcb stuff.

You are not supposed to have the headphones plugged in when powering up or powering down. This could damage your phones.

As for the pausing issue, I have no idea.

The issue of leaving your headphones plugged in is pretty thoroughly covered in some earlier segments of this thread. In particular, starting with post 228 from Peter Millett:

http://www.head-fi.org/forums/f6/mil...ml#post4220313

As originally designed, or with a slightly increased cap value (e.g., "470s all around") there is no risk to your headphones, and with the modified cap values there isn't even much of a "thump" at all.

using a cheap pair of headphones to test so i'm not worried about that and i was using it mainly as a comparison to what happens when i pause it


oddly enough it doesn't happen with my 4th gen ipod as a source, i only get really but popping when i unplug/plug the headphones in

Try tapping the input and output wires, so see if you are stressing a bad connection. Check the connections to the headphone and RCA jacks.

As for tubes, trying contacting the ebay seller the-radio-tube-supply-company. I got my tubes from him, but he might be out as he doesn't have anymore ebay auctions, but it doesn't hurt to ask.