Search found 169 matches

by ballfire
18 May 2020, 14:02
Forum: Pedal Debugging & Troubleshooting Support
Topic: Nux looper core pedal malfunctioning
Replies: 8
Views: 2685

Re: Nux looper core pedal malfunctioning

I will describe what's happening when I turned on the pedal it sounds like there's a wind blowing ..like shhhh..sound at the same time with dry signal of my guitar that's so low.you can hear the strings when you strum it but so tiny low output..what this could be?? Any body here has the same problem...
by ballfire
13 May 2020, 20:03
Forum: Pedal Debugging & Troubleshooting Support
Topic: Nux looper core pedal malfunctioning
Replies: 8
Views: 2685

Re: Nux looper core pedal malfunctioning

Intripped wrote: 12 May 2020, 18:37 "... or volume pots"
Did you check them, already?
I resolder the part where the volume pot is connected still the output dry signal is weak very weak.
by ballfire
12 May 2020, 16:57
Forum: Pedal Debugging & Troubleshooting Support
Topic: Nux looper core pedal malfunctioning
Replies: 8
Views: 2685

Re: Nux looper core pedal malfunctioning

Optical wrote: 12 May 2020, 02:17 possibly a dry or broken solder joint around the jacks or volume pots
I already resolder the input and output Jack but the problem still persist..any more suggestion??
by ballfire
11 May 2020, 14:19
Forum: Pedal Debugging & Troubleshooting Support
Topic: Nux looper core pedal malfunctioning
Replies: 8
Views: 2685

Nux looper core pedal malfunctioning

Hello people here I have a nux looper core pedal suddenly lost it's dry signal.when I plugged it .the volume of this pedal suddenly the bypass signal or the sound of my guitar lessen like the volume is very weak now.but all the functions work well as normal.. Anybody here have this pedal and with sa...
by ballfire
05 Apr 2020, 02:44
Forum: Boutique Stompboxes dissected...
Topic: Stage 3 booster
Replies: 6
Views: 1971

Re: Stage 3 booster

Hey what do you mean decoupling cap.?? Hi ballfire, You must put a cap in SERIES between the input jack and the 33K resistor that is the input of your pcb. I think that any poliester cap fom 10 to 47 nF works fine. Cheers, Jose Hello .. Wow it works your advice really works! I put a 0.047 cap betwe...
by ballfire
04 Apr 2020, 15:10
Forum: Boutique Stompboxes dissected...
Topic: Stage 3 booster
Replies: 6
Views: 1971

Re: Stage 3 booster

Hello

I'm stuck into this problem few days now I don't understand why my guitar volume scratching when turning it down rotatation to zero???

Hey what do you mean decoupling cap.??I'm gonna put a capacitor to ground at the input??so that it will not scratching my volume guitar??
by ballfire
04 Apr 2020, 03:15
Forum: Boutique Stompboxes dissected...
Topic: Stage 3 booster
Replies: 6
Views: 1971

Stage 3 booster

Hello I built a stage 3 booster from guitarpcb .after my build I tested it and sounds perfect no humming no noise issue in the pedal itself the parts are ok everything's good..but when I roll down my guitar volume there's a scratching noise..this only occurs when I plug this booster my other pedals ...
by ballfire
26 Feb 2020, 07:43
Forum: Amplifiers
Topic: using a 18volt transformer
Replies: 19
Views: 4443

Re: using a 18volt transformer

Was the LM1875 mounted on a heat sink? If not it will likely fail. Did you run it through a limiter at first power up? If not make a simple light bulb limiter it will save you from such disasters. google it,, easy to make up one. Also what schematic did you use? Maybe post it or link to it. Better ...
by ballfire
26 Feb 2020, 01:06
Forum: Amplifiers
Topic: using a 18volt transformer
Replies: 19
Views: 4443

Re: using a 18volt transformer

i tested the lm1875 power amp last weekend the result it was failed !!..i found out the chip was fake and behave improperly.i followed all the advices here but it was failure i run many test and debugged but nothing happends..i bought the chip from online from a china website dumb fool of me..what a...
by ballfire
21 Feb 2020, 08:09
Forum: Amplifiers
Topic: using a 18volt transformer
Replies: 19
Views: 4443

Re: using a 18volt transformer

phatt wrote:All good,,
You can make the bridge with four 1N5404 if you want, they are a 400V, 3A device,,,
or if you want a BR64 is a 400V, 6A full wave bridge.
Or anything with similar specs will do the job.
Phil.

i have a 25 ampere diode bride its a full wave bridge can i use it??
by ballfire
21 Feb 2020, 02:17
Forum: Amplifiers
Topic: using a 18volt transformer
Replies: 19
Views: 4443

Re: using a 18volt transformer

hello good morning everybody... thank you for helping me and understand this topic better americans are really great..especially in amplifiers i salute everybody here.. im targeting a 18volts to the amp and 20 watts of power speaker is okey for me.. what should i used in bridge diode?? how much ampe...
by ballfire
20 Feb 2020, 01:03
Forum: Amplifiers
Topic: using a 18volt transformer
Replies: 19
Views: 4443

Re: using a 18volt transformer

now you understand people yes thanks god thats what i mean my trans former 18-0-18volts i want to put a 18-0-18 transformer because i dont want to overheat the power amp because based on that chinese amp inspite it delivers a 30 watts speaker power the power amp gets hot very hot and busted graduall...
by ballfire
20 Feb 2020, 01:02
Forum: Amplifiers
Topic: using a 18volt transformer
Replies: 19
Views: 4443

Re: using a 18volt transformer

now you understand people yes thanks god thats what i mean my trans former 18-0-18volts i want to put a 18-0-18 transformer because i dont want to overheat the power amp because based on that chinese amp inspite it delivers a 30 watts speaker power the power amp gets hot very hot and busted graduall...
by ballfire
19 Feb 2020, 09:45
Forum: Amplifiers
Topic: using a 18volt transformer
Replies: 19
Views: 4443

Re: using a 18volt transformer

im confused man...

why is it that chinese amp so loud ??so i must use a 21 volts transformer to achieve a 20 watts on speaker output??? i thought that lm1875 can deliver 20 watts output of speaker sound???
by ballfire
19 Feb 2020, 07:46
Forum: Amplifiers
Topic: using a 18volt transformer
Replies: 19
Views: 4443

Re: using a 18volt transformer

The drawing is missing the centre tap common/ground. Ctap of Tx should join the Common of supply rails. Any bridge rectifier that is close to 4 x 1N4004 will suffice. With an 18VAC Secondary you will only get about 12-0-12 VDC maybe 13Volt at best. Which will easy run the LM1875 *BUT* you will neve...
by ballfire
19 Feb 2020, 04:33
Forum: Amplifiers
Topic: using a 18volt transformer
Replies: 19
Views: 4443

using a 18volt transformer

hello ..good afternoon i have this transformer with primary 220 volts and the secondary output is 18volts and its 3 amperes ..i want to ask anybody what kind of diode bridge i will use?? how many ampere of a diode bridge need for this 18 volts 3 ampere transformer..??? im gonna use this power transf...
by ballfire
16 Oct 2019, 00:56
Forum: Amplifiers
Topic: the right diode bridge ampere
Replies: 16
Views: 4986

Re: the right diode bridge ampere

can i mount the body of the diode bridge to the chassis of the amp?? can i put a screw on the middle hole of it and mount it to the amplifier chassis?? No problem, a lot of people do that. ok sir thanks..im gonna test this transformer and diode bridge.. thank you very much for the advice and opinio...
by ballfire
15 Oct 2019, 04:26
Forum: Amplifiers
Topic: the right diode bridge ampere
Replies: 16
Views: 4986

Re: the right diode bridge ampere

if i put it right it will work sir???the whole power supply?? i compute the voltage after the big capacitor is 21 volts going to the power amp am i right ?? Yes it should work. You might get a bit more voltage, say 22V at no load. At no load the transformer output will be a little higher than 15V r...
by ballfire
14 Oct 2019, 07:42
Forum: Amplifiers
Topic: the right diode bridge ampere
Replies: 16
Views: 4986

Re: the right diode bridge ampere

please check my new diagram below if it will work on my mg15 marshall amplifier power section or if my amp will work normally or gonna blow up Wired exactly like you have drawn it - it will blow up! Notice there a "+" terminal. The terminal is pointing in a different direction to all the ...