Noise on preamp

Tube DIY Asylum

Do It Yourself (DIY) paradise for tube and SET project builders.

Question concerns the phono stage of a ARC-SP16. To start off, I should mention everything sounds great. I have been converting a few LPs to digital using Audacity. When I looking at the monitoring meter but not actually recording that there is "jittery noise" on the left channel but not on the right. If I touch the 1 uF cap on the plate of V1 (left channel), the jitter goes away but the baseline noise jumps up. The same happens when I touch the 1 uF cap on the right channel sans jitter. Did some tube swaps, etc. without any change.
Attached is the schematic of the phono stage and screenshot of Audacity. Any ideas?

"Our head is round in order to allow our thoughts to change direction." Francis Picabia

Edits: 04/25/21

This post is made possible by the generous support of people like you and our sponsors:

VH Audio

Topic - Noise on preamp - neolith 08:38:36 04/25/21 (12)

A simple check - cellailuca 09:26:06 04/26/21 (2)

RE: A simple check - neolith 13:37:06 04/27/21 (1)

RE: A simple check - rivervalley817 14:20:54 04/27/21 (0)

RE: Noise on preamp - Jonesy 12:07:34 04/25/21 (5)

RE: Noise on preamp - sony6060 23:42:55 04/25/21 (4)

RE: Noise on preamp - Stephen R 01:11:40 04/26/21 (3)

RE: Noise on preamp - sony6060 01:19:22 04/26/21 (2)

RE: Noise on preamp - Stephen R 03:48:14 04/26/21 (1)

RE: Noise on preamp - sony6060 07:52:02 04/26/21 (0)

RE: Noise on preamp - Stephen R 12:04:04 04/25/21 (0)

RE: Noise on preamp - Triode_Kingdom 09:56:15 04/25/21 (1)

RE: Noise on preamp - neolith 11:02:59 04/25/21 (0)

FAQ

Post a Message!

Forgot Password?

Moniker (Username):
Password (Optional):
	Remember my Moniker & Password (What's this?) Eat Me
E-Mail (Optional):
Subject:

Message:	(Posts are subject to Content Rules)

Optional Link URL:
Optional Link Title:
Optional Image URL:
Upload Image:
E-mail Replies:	Automagically notify you when someone responds.

To view your new posting or follow-up, click on the RELOAD or REFRESH button on your browser.