Search found 303 matches

by FiveseveN
12 Jan 2018, 07:55
Forum: Amplifiers
Topic: Connect Amplifier to Earphone
Replies: 7
Views: 3194

Re: Connect Amplifier to Earphone

Spam and trigonometry, eh? These bots are getting clever :D.
by FiveseveN
09 Jan 2018, 22:52
Forum: Amplifiers
Topic: LM380 Heat Sink considerations
Replies: 4
Views: 1359

Re: LM380 Heat Sink considerations

I'm not entirely sure how it attaches to the chip itself, or if I was, how to source the material/build it. Caption next to drawing: "Soldered to Pins 3, 4, 5, 10, 11, 12". The chip is designed to use the PCB copper for heat sinking, and figure 6 promises 2.5 W dissipation in this kind of typical a...
by FiveseveN
08 Jan 2018, 14:19
Forum: Amplifiers
Topic: Connect Amplifier to Earphone
Replies: 7
Views: 3194

Re: Connect Amplifier to Earphone

rymonsandy wrote:plug it into the amp
Plug it into what, the speaker output? Line level? Headphone out?!
Was it a simple 6.3 to 3.5 mm adapter?

Image
by FiveseveN
08 Jan 2018, 12:07
Forum: DIY Stompbox designs
Topic: modular guitar pedals idea - work in progress...
Replies: 15
Views: 5200

Re: modular guitar pedals idea - work in progress...

Cool indeed. I love it when people develop tools for sonic exploration rather than the next FF or TS variant. Are you making these for yourself or planning on a comercial series? In any case, take a look at modular synths on the off chance you are not familiar with them; following the Eurorack stand...
by FiveseveN
23 Dec 2017, 23:14
Forum: Boutique Stompboxes dissected...
Topic: Hotone Nano Legacy Amps - Heart Attack [traced]
Replies: 65
Views: 25297

Re: Hotone Nano Legacy Amps - Heart Attack [traced]

Ichabod_Crane wrote:is there some alternative way to push the volume without get distortion?
Do you know what clipping is?!
The only way to get more power out is to have more headroom available, i.e. use that god damn 18 V supply. Look at figure 3 of the datasheet: 4 W output @ 12 V and 9 W @ 18 V.
by FiveseveN
22 Nov 2017, 21:16
Forum: Amplifiers
Topic: DIY DI BOX or LINE OUT for 60W tube head?
Replies: 12
Views: 3042

Re: DIY DI BOX or LINE OUT for 60W tube head?

You will need a dummy load first, and you may pick a simple resistive one or a reactive load. Then use a resistive divider to bring the signal down to line level. Add a balanced driver if you feel fancy. You will also need a cabinet simulator, but I suggest adding one in software, with plugins like ...
by FiveseveN
13 Nov 2017, 22:13
Forum: Boutique Stompboxes dissected...
Topic: Hotone Nano Legacy Amps - Heart Attack [traced]
Replies: 65
Views: 25297

Re: Hotone Nano Legacy Amps - Heart Attack [traced]

Ichabod_Crane wrote: R2
Mine: 2.2R
HA: 12R
Well, you have 5 times more gain. Increase R2 to set the input sensitivity you require.
Also pins 1 and 2 are swapped (mislabeled) in J0K3RX's schematic.
by FiveseveN
11 Sep 2017, 14:16
Forum: DIY Stompbox designs
Topic: cabsims... and even more cabsims
Replies: 49
Views: 17497

Re: cabsims... and even more cabsims

I'd say #2 and #3 have the most "accurate" treble roll-off. Tweaking the mid scoop would yield a range of usable tones.
I am curious to find out what they all are.
by FiveseveN
03 Jul 2017, 20:56
Forum: DIY Stompbox designs
Topic: simple buffer/booster
Replies: 2
Views: 2024

Re: simple buffer/booster

It probably would pop since for a few ms the feedback would be floating. Solution is to simply short the pot for buffer mode. I.e. just use a SPST, excluding pin 1 of the depicted switch and connecting the pot at pin 2.
by FiveseveN
08 May 2017, 15:01
Forum: Modern Stompbox Effects (1975 - ...)
Topic: Lehle - Sunday Driver [schematic]
Replies: 18
Views: 7491

Re: Lehle Sunday Driver [schematic]

would this filtering be helpful in a Big Muff circuit or an Overdrive / Clean boost to keep the noise down? Discrete designs like the more popular Big Muffs have poorer PSRR than something like this, so sure. But what exactly do you mean by "this filtering"? There's a rectifier, smoothing cap(s) an...
by FiveseveN
24 Apr 2017, 10:11
Forum: Modern Stompbox Effects (1975 - ...)
Topic: TS7 hot mode reducing gain?
Replies: 7
Views: 2221

Re: TS7 hot mode reducing gain?

I don't know what the "hot mode" is and you shouldn't assume other forum members do either. A smaller value pot would not help since it is driven by a (fairly) low output impedance buffer. You don't need to "install a 100k resistor in front of the volume pot", that's what R49 is. Just swap it for a ...
by FiveseveN
23 Apr 2017, 16:54
Forum: Modern Stompbox Effects (1975 - ...)
Topic: TS7 hot mode reducing gain?
Replies: 7
Views: 2221

Re: TS7 hot mode reducing gain?

The second op amp stage doesn't provide make-up gain, just some treble boost at the higher tone pot settings. And yes, both transistors are discrete buffers.
by FiveseveN
23 Apr 2017, 08:51
Forum: Modern Stompbox Effects (1975 - ...)
Topic: TS7 hot mode reducing gain?
Replies: 7
Views: 2221

Re: TS7 hot mode reducing gain?

When people say "gain" they usually mean saturation / distortion, especially when talking about a dirt box. But as I understand you need less output volume, right? Easily done by using a larger value resistor before the volume pot. That would be R49 in this schematic: http://www.matsumin.net/diy/bun...
by FiveseveN
20 Mar 2017, 00:59
Forum: Resistors
Topic: Need help identifying this type of resistor
Replies: 2
Views: 6517

Re: Need help identifying this type of resistor

That would be 100 Ω. It's just another notation.
by FiveseveN
08 Feb 2017, 15:26
Forum: Amplifiers
Topic: Relay signal switching
Replies: 4
Views: 1801

Re: Relay signal switching

Just look at the schematic of some 2-channel amps. It can be as simple as a SPDT relay and a dollar's worth of control circuitry. There is guitar input connected to pcb and output to desired amp is controlled by relay No, you'd want to switch the output . Input can be easily split. Also I hope we're...
by FiveseveN
30 Jan 2017, 22:00
Forum: Ready-To-Build Effect Projects
Topic: SVS Tube Distortion
Replies: 16
Views: 1572

Re: SVS Tube Distortion

I've been painting and restoring homes since 1980 And when did you start copy writing for the Home Shopping Network? Ever heard the idiom "a picture is worth a thousand words"? We'd be happy to trace Marc's amp as well if you provide us with the proper images. But that's not what this thread is abo...
by FiveseveN
19 Jan 2017, 17:56
Forum: Boutique Stompboxes dissected...
Topic: JHS Moonshine [traced]
Replies: 13
Views: 4262

Re: JHS Moonshine [traced]

I swear to dog, this thread is indistinguishable from a Monty Python sketch.
So the Moonshine is YATS. OK, no surprises there. But what's with the SuperBolt schematic? Seriously.
by FiveseveN
13 Jan 2017, 10:08
Forum: Software Room
Topic: Need two Eagle library components.
Replies: 3
Views: 4212

Re: Need two Eagle library components.

Might be quicker to edit or make your own from scratch. Here's a tutorial: http://hackaday.com/2016/09/22/making-a ... le-part-1/
by FiveseveN
11 Sep 2016, 22:51
Forum: Boutique Stompboxes dissected...
Topic: Friedman BE-OD Pedal [traced]
Replies: 663
Views: 204570

Re: Friedman BE-OD Pedal [traced]

The Tight control won't do anything as drawn, but grounding (tying to Vr) the pot's pin 1 does the trick:
Image
Probably missed a trace.
by FiveseveN
02 Jun 2016, 12:22
Forum: Pedal Debugging & Troubleshooting Support
Topic: True bypass with battery switch?
Replies: 6
Views: 194

Re: True bypass with battery switch?

Short story: it's not. Don't bother.