News:

Forum upgraded to SMF 2.1.2!

Main Menu
Welcome to Solid State Guitar Amp Forum | DIY Guitar Amplifiers. Please login or sign up.

August 08, 2022, 07:07:53 PM

Login with username, password and session length

Recent Posts

 

Recent posts

#1
Amplifier Discussion / Re: 12w Marshall
Last post by joecool85 - Today at 08:51:11 AM
Great work!  I split the topic though and made this it's own so it can be an easy resource for others later.
#2
Amplifier Discussion / Re: Re: Adafruit PAM8302 Ampli...
Last post by Jazz P Bass - July 30, 2022, 12:41:30 PM
Nice work!
#3
Schematics and Layouts / Re: Ibanez TSA30 Schematic and...
Last post by theaterguy - July 28, 2022, 03:49:53 PM
Hi all, I finally made myself open this thing and did those easy mods that everyone should do. Resistors R4 and R5 changed to 100K. Tames a lot off noise.
#4
Amplifier Discussion / Re: Fender 112 Deluxe Plus
Last post by FenderDeluxe112Plus - July 24, 2022, 10:09:07 AM
Thanks Phil,

This is the method I have been using so far, I thought there might be other ways to test in circuit.
#5
Schematics and Layouts / Re: Searching schematic fender...
Last post by phatt - July 24, 2022, 09:09:28 AM
Yes TassieVikingman,, fp is short for Flame Proof. ;)

@ Scooby,
Those resistors often run warm but as they drop a fair amount of voltage they cop heat, if the 130-Ohm resistor has burnt then the resistance may have dropped and then  C285 has likely been running over the voltage rating and died, as you have found. I'd replace C286 while you are there. Even better replace with 35volt caps.

If those 2 resistors are running very hot that can shorten there life.
If excessively hot in normal use you can use 2 watt resistors which will run cooler and hence last longer.
Phil.
#6
Amplifier Discussion / Re: Fender 112 Deluxe Plus
Last post by phatt - July 24, 2022, 07:59:04 AM
I get the impression you are not clear on diode testing, If so then
You check diodes with power OFF and lift one end of the diode.
Meter set to diode test.

If you get a reading both ways it's dud.
To save writing it all,, go here;

https://www.fluke.com/en-us/learn/blog/digital-multimeters/how-to-test-diodes
HTH,Phil.
#7
Amplifier Discussion / Re: Fender 112 Deluxe Plus
Last post by FenderDeluxe112Plus - July 24, 2022, 02:57:03 AM
Thanks Enzo,

Where would be the next logical points to test?
#8
Schematics and Layouts / Re: Looking for the tiny Orang...
Last post by Tassieviking - July 23, 2022, 11:30:41 PM
You cannot view this attachment.

All I have on small Orange amps

Also this thread on DIY stompboxes :  https://www.diystompboxes.com/smfforum/index.php?topic=87122.0

This video shows a schematic as well : https://www.youtube.com/watch?v=7WM6HoQmDgU
#9
Schematics and Layouts / Re: Searching schematic fender...
Last post by Tassieviking - July 23, 2022, 11:15:00 PM
Scoobynuts, please take note of the fp before the 130 on the resistor.
This might mean the resistor should be fireproof, if it fries again it will not go up in flames as long as you use a fireproof resistor.
I could be wrong, but would you chance it. Some of the more knowledgeable people here might pipe in and I and others might learn something important if they know what it stands for. :)
If it might get hot, make sure you leave some space under the resistor for airflow, also makes the PCB less hot.
#10
Amplifier Discussion / Re: Fender 112 Deluxe Plus
Last post by Enzo - July 23, 2022, 08:56:56 PM
No.

Look at your schematic.  R82 connects directly to CP5, which the schematic says has 31.9va on it.  Close enough.