Solid State Guitar Amp Forum | DIY Guitar Amplifiers
Welcome,
Guest
. Please
login
or
register
.
News:
SSG-AMP-1 "Honey" amp kit Kickstarter campaign has been launched!
Home
About
Links
Help
TinyPortal
Search
Login
Register
Solid State Guitar Amp Forum | DIY Guitar Amplifiers
»
Forum
»
Solid State Amplifiers
»
Tubes and Hybrids
»
Vox vt120+ combo schematic needed
User Controls
Welcome,
Guest
. Please
login
or
register
.
January 28, 2021, 10:12:23 AM
1 Hour
1 Day
1 Week
1 Month
Forever
Login with username, password and session length
Recent Posts
Rocktron Rampage R80 - No...
by
paolone
[
Today
at 02:15:23 AM]
Marshall ValveState VS232...
by
EddieH
[January 27, 2021, 10:45:49 AM]
Ultra Chorus/Ultimate Cho...
by
fallingfrog
[January 24, 2021, 11:26:11 PM]
Ibanez TSA30 Schematic an...
by
Diydidi
[January 24, 2021, 03:07:16 AM]
Reduce signal from preamp...
by
flester
[January 23, 2021, 05:09:29 AM]
« previous
next »
Print
Pages: [
1
]
Go Down
Author
Topic: Vox vt120+ combo schematic needed (Read 934 times)
Psabin8951
Regular
Posts: 34
Chip Points: 0
Vox vt120+ combo schematic needed
«
on:
September 29, 2020, 12:17:14 PM »
Does anyone have a schematic for a vox vt120+ valvetronic combo please.
Or even be able to tell me values for C184 and C185 as both are burnt out erasing markings.
Many thanks
Logged
DrGonz78
Legendary
Posts: 562
Chip Points: 69
Re: Vox vt120+ combo schematic needed
«
Reply #1 on:
September 29, 2020, 01:57:13 PM »
Looking through the VT80+ schematic C184 & C185 are near the speaker output. Obviously they are different circuits but I am curious where in the circuit those two capacitors are located on your amp board. Look at page 4 quadrant H2 of the VT80+ schematic and locate C184 & C185 the 0.68uf 100v film capacitors. Look on your board near the burnt out caps to locate two 1000pf 100v caps (C146 & C147) that run in parallel with those caps. May be a long shot here but perhaps these two schematics share something in common or possibly not. Can't hurt to check.
Logged
“A person who never made a mistake never tried anything new.” -Albert Einstein
Psabin8951
Regular
Posts: 34
Chip Points: 0
Re: Vox vt120+ combo schematic needed
«
Reply #2 on:
September 30, 2020, 07:13:32 AM »
Yes spot on. They are the same.
Do we think a blown valve would be likely to make C184 "explode"?
Logged
Jazz P Bass
Elite
Posts: 258
Chip Points: 21
Re: Vox vt120+ combo schematic needed
«
Reply #3 on:
September 30, 2020, 11:31:14 AM »
The amp uses a surface mount TAS5615 Class D output IC.
As both of those blown capacitors are on each output rail, it is hard to see why both of them blew up.
Unless the output IC went belly up & cooked them at a high frequency.
Logged
Print
Pages: [
1
]
Go Up
« previous
next »
Solid State Guitar Amp Forum | DIY Guitar Amplifiers
»
Forum
»
Solid State Amplifiers
»
Tubes and Hybrids
»
Vox vt120+ combo schematic needed