New Posts New Posts RSS Feed - DIY Novo problem
  FAQ FAQ  Forum Search   Events   Register Register  Login Login

Welcome to the Graham Slee Audio Products Owners Club

 

Open to all owners plus those contemplating the purchase of a Graham Slee audio product wishing to use our loaner program: join here
Subscribe to our newsletter here (Rules on posting can be found here)

DIY Novo problem
 Post Reply Post Reply Page  12>
Author
  Topic Search Topic Search  Topic Options Topic Options
Kevb View Drop Down
New Member
New Member


Joined: 01 May 2020
Status: Offline
Points: 4 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Kevb Quote  Post ReplyReply Direct Link To This Post Topic: DIY Novo problem
    Posted: 22 Feb 2022 at 12:12pm
Hi Gents
My lock-down project was to build myself the DIY version of the NOVO headphone amp. I have enjoyed listening to wide sound-stage and clarity this extraordinary amp brings. One issue though - I hear a what i can only describe as a "flutter" noise on one channel when not playing music. The volume doesn't increase with the volume control, but can decrease if I extend the headphone lead to full length!. I have tried other headphones and plugging / unplugging interconnects - but without success. Any ideas please?
Back to Top
Fatmangolf View Drop Down
Moderator Group
Moderator Group
Avatar

Joined: 23 Dec 2009
Location: Middlesbrough
Status: Offline
Points: 7964 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Fatmangolf Quote  Post ReplyReply Direct Link To This Post Posted: 22 Feb 2022 at 7:47pm
Thanks Kev. I would disconnect it from the PSU and use a soldering iron to reflow the various junctions on the circuit board i.e. just enough heat to melt them and left them cool. Graham or John may uhave more specific advice and a better solution.
Jon

Open mind and ears whilst owning GSP Genera, Accession M, Accession MC, Elevator EXP, Solo ULDE, Proprius amps, Cusat50 cables, Lautus digital cable, Spatia cables and links, and a Majestic DAC.
Back to Top
Ash View Drop Down
Senior Member
Senior Member
Avatar

Joined: 18 Mar 2013
Location: Dorset
Status: Offline
Points: 4101 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Ash Quote  Post ReplyReply Direct Link To This Post Posted: 22 Feb 2022 at 7:54pm
Sounds like the lead is acting as an aerial. EM inductance?
Back to Top
Fatmangolf View Drop Down
Moderator Group
Moderator Group
Avatar

Joined: 23 Dec 2009
Location: Middlesbrough
Status: Offline
Points: 7964 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Fatmangolf Quote  Post ReplyReply Direct Link To This Post Posted: 22 Feb 2022 at 7:56pm
Dry joint was my first thought hence the reflow.
Jon

Open mind and ears whilst owning GSP Genera, Accession M, Accession MC, Elevator EXP, Solo ULDE, Proprius amps, Cusat50 cables, Lautus digital cable, Spatia cables and links, and a Majestic DAC.
Back to Top
Ash View Drop Down
Senior Member
Senior Member
Avatar

Joined: 18 Mar 2013
Location: Dorset
Status: Offline
Points: 4101 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Ash Quote  Post ReplyReply Direct Link To This Post Posted: 22 Feb 2022 at 8:44pm
My previous suggestion can't be correct otherwise both channels would be affected.
Back to Top
Kevb View Drop Down
New Member
New Member


Joined: 01 May 2020
Status: Offline
Points: 4 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Kevb Quote  Post ReplyReply Direct Link To This Post Posted: 23 Feb 2022 at 10:18am
Thanks for the responses Gents. By re-soldering the junction John- do you mean have a go at all the components joints?
Thanks once again
Back to Top
Graham Slee View Drop Down
Admin Group
Admin Group
Avatar
Telling it as it is

Joined: 11 Jan 2008
Location: South Yorkshire
Status: Offline
Points: 14252 		Post Options Post Options   Thanks (1) Thanks(1)   Quote Graham Slee Quote  Post ReplyReply Direct Link To This Post Posted: 23 Feb 2022 at 11:32am
If you have a jeweller's eye-glass inspect every soldered joint. Should any of the ceramic (and possibly the two small blue boxed) capacitors be "dry jointed" they won't do their job of providing stability - an unstable amp goes to RF interference - it oscillates like a radio receiver. If a stability capacitor were to be "left out" of a power amplifier that channel would be burnt to a crisp by now.

The trouble with electronics kits is, unless you're an knowledgeable electronics enthusiast, when things go wrong, it's where to start. From that point of view, I hate selling kits, although I'm always being asked to do them. The reason for there not being many audio kit manufacturers is twofold: 1. poor demand due to lack of interest in electronics, and 2. any profit they made was consumed in correcting constructor error. Both lead to insolvency.
Not simple enough for Google-Bot to understand...
Back to Top
 Post Reply Post Reply Page  12>
  Share Topic   

Forum Jump Forum Permissions View Drop Down

Forum Software by Web Wiz Forums® version 12.01
Copyright ©2001-2018 Web Wiz Ltd.

This page was generated in 0.109 seconds.