Hi,

Got a question about the Matchless Hotbox, the clean channel has a 220k resistor in parallel with a 560pF capacitor after the volume control.

I have used this same config in a Valve Junior, and it gives a really nice sorta 'edge' to the sound, so my question is, what is this snippet functioning as? A filter etc???

Also, what are the maths involved, if I wanted to add this to another amp, but with a different resistance value, how would I work out the 'correct' cap value?

many thanx...

Looking the Analoguru design C1 is 100nF, looking Dirk design C1 is 10nF.
Why different ?

Has anyone tried adding a tonestack to the Tubescreamer? I tried adding a Baxandell, but lost any unity gain. I would like to add it before the buffer, and make the buffer into a gain stage?

Thanks
Rob

I am trying to add an extra gain stage into my blue box build to combat the gain suck that it has. Does anyone have any input on where exactly I should put it in at?

I want a buffer on the input of my pedalboard to drive the signal through better. I've built a SHO clone and like it as a buffer (gain all the way down) but need it as a boost.

So would I be crazy to build another SHO circuit with no potentiometer (fixed resistor at minimum gain) and no footswitch as an always-on buffer? Or are there better buffer designs?

P.S. I do like the extra mojo that the SHO circuit adds as a buffer.

just a thought-

should a circuit with a tone control loading it's output always have the o/p buffer before the volume control so that they do not interact, or is there ever a time when you would put an o/p buffer post volume control? keep in mind that the pedal will remain true bypass- no post switching buffers.

I found this on a website and was wondering if anyone has used this or has any thoughts on it. I'm looking for a good tone stack with lots of options. It says its incomplete, but being new to the whole DIY stuff im a bit confused.

Hi guys..
So i understand that the sweep of a tone control is determined by the resistance of the pot (20k) and another resistor (say 1k) and a capacitor and the capacitor works with the 2 resistances to set the high and low frequencies on the tone control range. right?
My question is does the value of the resistor affect the structure of the sound of the pedal??
; in other words can you exactly match the sound of 2 pedals each with different tone control ranges if you hit the same frequency...

i want to remove any interactive (the one you can change with a pot) tonestack from a rat, a shredmaster and a ts-808. they will be incorporated into a boss me-5 analog multifx, and i have only one 'digital pot' for each of them (actually, a 8-ch multiplexer with resistors), assigned to gain. the box has a separate volume control after the od/dist circuit AND a 3-band mid-parametric eq, so I won't have any problems with controlling the tone. however, any fixed filter incorporated in the pedals...

good day..fellow men.

i just wondering can i use this kind of jfet to all the transistors inside dr, boogie circuit? Anybody have a opinion on this?

thanks

hello guys...

i just want to ask a question..Is there other echo chip can be substitute for PT2399? same pins maybe same function pins but different arrangement of pins..

thank you..

Hi all, I wanted to know if there were any cool schematics for good tube-based pedals here. I loved my SIB Varidrive but it is long gone. Things like Tonebone or Real Tubes need not apply, I'm talkoing about realistic plate voltages. I figure there must be some designs I don't know about floating around? (Heck, the guitar world loves tube amps, so tube pedals should be both way more common than they are and relatively easy to design with so many amp gurus IMO)

thanks

Ok I want to know what the big deal with phase inverting is, I mean, I have always heard that when building effect pedals, you should try and not invert the guitar singnal 180 degrees, but why, I'm a tech and knows that the the sound isn't affected by this, if there where two signals, it would make sense since they would phase each other out, Did I over-see something?

I know that LPB1 (or all pnp, npn one-tramsistor boosters), electra distortion, Little angel chorus ,and a lot of others pedals...

My question is, how delay pedals and boutique delays etc. Send the tempo to the delay. Mainly how does it do the subdivisions etc. I'm interested in trying to replicate subdivisions in an external tap tempo pedal for pedals that have tap tempo inputs but no subdivisions. Any help would be greatly appreciated.

Thanks, Clint

Ok couple opamp questions
Im starting learning something more of the inside so stupid questions about simple things
Anyway
A - take a look at the TS/Sd1/90%of similar overdrives diode clipping section...between the two opamp pins there are 2/3 diodes (or more variants....)clipping
....a variable resistor (or a pot+fixed resistor)....gain control
But on a lot of similar circuits there is a small cap (often a 47/50pf not polarized) ....now the question is.....what the HELL that cap is about ??...

Ok ,so i wasted quite some time starring at synth circuits and i got used to bipolar suply ,and now i thought i make a simple booster distortion or some like that nothing fancy just the opposite to get used on soldering again .. and i stuck with unipolar supply in all the schematics - there is only +9V and ground ,i read a bit about virtual ground and dividing with 2 resistors ,but still i want a practical help ,anyone ... does the ground refers to the negative rail of the battery (battery...

...plugged into my amp. :oops: :roll: .What kind of RF elimination circuit does anyone recommend for my boost circuit??

just not getting the hits at diystomp so i figured i'd try over here.

when dealing with a circuit such as the paralooper...

is it totally necessary to have the output buffer or will a simple passive mix section suffice?
if you connect the + input of U2-A to the - with a switch, will that work to invert the phase?

just wondering if this little circuit would be useful in stompboxes, I found this schem-

I saw the schematic for Anderton's amazing Quadrafuzz, and it looks like the device splits the guitar signal into high , high mids, low mids, and lows...then runs each part through its own effect before recombining them. And it looks like opamps are involved in each split signal as they are incorporated into their respective fuzzes.

I am interested in doing something similar but only with 3 bands -- high, mids and lows -- and then running each through their own simple cascading JFET...

I'm kinda displeased with the tone suck of my EB VP. I was thinking that maybe if I added a buffer it could remove that tone suck? I'm guessing thats what the active volume pedals do? - like the Goodrich, etc. Would adding a buffer eliminate that tone suck? If so, what is a simple, effective buffer to build?

Hello all-

I'm new to building pedals...my tinkering consists of building tube amps, now i'd like to try out pedals. Looks like it might become addicting!

Anyway, i'd like to start with something simple like an electra distortion variation. I like how some of these sound with the amp cooking a bit- but some of them have a bit of 'rattiness' in the distortion....would this be due to the clipping diodes? Are there any good tricks to try to smooth this out?

Thanks in advance..i'm loving this...