Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Tubes / Valves All about our sweet vacuum tubes :) Threads about Musical Instrument Amps of all kinds should be in the Instruments & Amps forum

Sound Valves vtp-101 Schematic
Sound Valves vtp-101 Schematic
Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Thread Tools Search this Thread
Old 20th February 2011, 11:51 PM   #1
prb123 is offline prb123  United States
diyAudio Member
Join Date: Sep 2004
Location: Michigan
Default Sound Valves vtp-101 Schematic

Does anyone have a schematic for a Sound Valves vtp-101 pre-amp?

Mine is blowing fuses immediately on start-up. It looks like I'll have to remove the front knobs, then the faceplate then can pull the board to troubleshoot (plus I have to be careful of the wiring to the phono jacks)...so I'd like as much info as possible before starting.

Thanks in advance,
  Reply With Quote
Old 8th May 2011, 10:30 PM   #2
Jack Graves is offline Jack Graves  United States
diyAudio Member
Join Date: Aug 2009
Location: Augusta Georgia
I am looking for a schematic for the vtp 101 also My preamp has hum and several caps are bad for sure .Did you ever find a schematic
  Reply With Quote
Old 30th November 2011, 03:40 PM   #3
heyraz is offline heyraz  United States
diyAudio Member
Join Date: Jan 2011
I've also been looking for a VTP-101 schematic as I would like to beef up the power supply. In the meantime, my unit recently developed a slight hum and finally blew it's fuse last week. All the high voltage electrolytic caps showed evidence they had leaked, which I think eventually caused the bridge rectifier to blow shorted, which blew the fuse. I replaced all of the high voltage electrolytic caps other than the 3 cans and the bridge rectifier with a 4A 400V BR (orig was 2A 50V). As I noticed the main board showed evidence of excessive heat below the BR, I raised the new BR up 1\2" on it's leads to allow it to radiate better. I also replaced the wires from the phono inputs with 24G solid twisted pair (original appeared to be 20G stranded) and replaced the 2.2uf 160v MPK output coupling caps with 2.0uf 200v Sprague Vit Q PIO's. After the PIO's broke in, the sound really opened up an became more transparent. Very satisfied with the PIO's. Next I plan on changing the cheap vol pot to a higher quality stepped pot.
Please let me know it you ever came across a schematic. Thanks. Rich
  Reply With Quote
Old 5th December 2011, 05:03 AM   #4
sso is offline sso  United States
diyAudio Member
Join Date: Jun 2006
Default Schematic

I just bought a VTP-101 last week. It was a copy of the very rare Dynaco PAS-3 Series II.

PM me I can send you a copy of the manual.

Roy at tubes4hifi knows everything about every Dynaco products. You should have a chat with him.

  Reply With Quote


Sound Valves vtp-101 SchematicHide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Sound Valves M40 schematic 11ongas Tubes / Valves 9 9th June 2018 07:14 PM
Hafler parts - Sound Valves? DMF Solid State 24 30th November 2016 05:15 AM
valves dont sound so good when pink.... adamus Tubes / Valves 2 2nd October 2009 09:58 AM
Searching Sound Valves M40 Monoblocks schematic echo_airiti Tubes / Valves 2 25th January 2008 01:32 AM
Sound Valves M-40 assistance audioquestM-40 Tubes / Valves 3 20th December 2005 05:46 PM

New To Site? Need Help?

All times are GMT. The time now is 05:13 AM.

Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.79%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio