Welcome to DU! The truly grassroots left-of-center political community where regular people, not algorithms, drive the discussions and set the standards. Join the community: Create a free account Support DU (and get rid of ads!): Become a Star Member Latest Breaking News Editorials & Other Articles General Discussion The DU Lounge All Forums Issue Forums Culture Forums Alliance Forums Region Forums Support Forums Help & Search

The DU Lounge

Aerows

(39,961 posts) Mon Jun 27, 2016, 01:40 PM Jun 2016

I have one that literally has tubes, but there is quite a bit of hum. Maybe the tubes aren't affixed properly?

There is a LOT of hum. I'm great with car stereos but headphone hi-fi is not my wheelhouse.

This is what I have:

https://www.amazon.com/Little-puffer-Preamp-Preamplifier-amplifier/dp/B00OY1PR9K/ref=pd_lpo_23_tr_img_2?ie=UTF8&psc=1&refRID=MT094E3AXW58WMCBNVRN

12 replies

= new reply since forum marked as read

Highlight:

I need a better headphone amp [View all] Aerows Jun 2016 OP

Tube-anything is generally pricier than solid state-anything. mahatmakanejeeves Jun 2016 #1

I'll pull the schematic up and post it Aerows Jun 2016 #2

Schematics Aerows Jun 2016 #3

Do you have a voltmeter? mahatmakanejeeves Jun 2016 #5

I messed around making a CMOY Aerows Jun 2016 #8

Of all the things I have Aerows Jun 2016 #10

My configuration is an ASUS DGX Aerows Jun 2016 #4

Tubes in question Aerows Jun 2016 #6

And yes, I'm aware I need a manicure Aerows Jun 2016 #7

Isolated the power supply Aerows Jun 2016 #9

Bad ground. mahatmakanejeeves Jun 2016 #11

In other words, it sucks. Aerows Jun 2016 #12