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Messages - Jazz P Bass

#16
Sounds like a fun project.
The real issues will be the cabinet & the recharge circuit.

Alesis has a 25 w/ 50 w peak amp for under 200 US.
https://www.sweetwater.com/store/detail/TransActW2--alesis-transactive-wireless-2
#17
The Newcomer's Forum / Re: Warwick Xtreme 10.1
September 27, 2021, 12:20:57 PM
Here is the schematic if thqt helps.
#18
Amplifier Discussion / Re: Fender M80 Issues
September 27, 2021, 12:20:51 AM
More likely than not there was a zener diode failure.
Cr 25 or CR26 on this drawing.
#19
The Newcomer's Forum / Re: Hello
September 15, 2021, 11:25:45 AM
Welcome to the sight.
It sounds like you are on a roll!
#20
Amplifier Discussion / Re: Fender London Reverb
September 09, 2021, 12:22:57 AM
What does the supply read for the power amp stage?
+33Vdc & -33Vdc is stated.

The 15 Vdc supply is for the opamps.
A 3 volt drop will not hurt.
As long as they are both the same. (+ & -)

The 18 Vdc supply is for the reverb & effects.
Again. No biggy as long as they are both the same.

Have you checked for Vac ripple?

#21
The Newcomer's Forum / Re: Greetings from a new member
September 04, 2021, 01:34:16 AM
Hello, Andre.
Welcome to the Forum.
#22
Ohms Law
I=P/V
375W /120V = 3.12Amps

What you should look for is a cord that is the proper length for how you plan to use the amp.

At home a 5 or 6 ft cord will be fine.

On a stage you may want a 10 footer.
#23
I am simply going by Roland's recommended values.
Leaving out the ground resistor defeats the divider circuit.

Play with the values if you like.
https://ohmslawcalculator.com/voltage-divider-calculator
#24
"What would happen if I leave it out?"

You will not have a proper 'voltage divider' circuit.
#25
Honey Amp / Re: Thoughts on my new Honey Amp
July 28, 2021, 11:45:33 AM
" No power switch, but I can understand the omission, since this is supposed to be highly customizable. I have to pop the battery connectors to power down, but my enclosure choice makes that easy enough"

You could try a 3 prong switching jack that disconnects the battery ground when no cord is inserted.

Like pedals use.
#26
The Line Out circuit uses 2 47K and 1 100ohm resistors for the summing network.
You can disconnect R155 and add a 100 ohm resistor to ground to get a separate feed.
#27
The Newcomer's Forum / Re: Just joined...
July 07, 2021, 12:44:00 AM
Welcome to the place.
#29
Amplifier Discussion / Re: Pedal Hiss?
June 21, 2021, 12:54:48 PM
I would not think that it's the battery's fault.
More likely it's the dc to dc converter.
Do you have access to a scope to find what frequency the hiss is?
#30
Amplifier Discussion / Re: Pedal Hiss?
June 20, 2021, 09:48:21 AM
Oh.
But the converter is what is making the pedals hiss?
Not the amp? (with the pedals powered from the converter)