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Good buffer to place at the beginning of pedalboard

PostPosted: 15 Oct 2012, 15:09
by Roast7
I would put a good buffer to the beginning of the sequence of pedals
I thought the "Amz JFET transistor BUFFER" but wanted to build on stripboard.

've Looked schemes stripboard but found none so with good feedback ...

What do you advise??

best regards
Daniel

Re: Good buffer to place at the beginning of pedalboard

PostPosted: 16 Oct 2012, 21:35
by Roast7
Someone to help?

Re: Good buffer to place at the beginning of pedalboard

PostPosted: 16 Oct 2012, 21:43
by biliousfrog
I'm using a Klon buffer, built from a kit that this guy sells: http://shop.pedalparts.co.uk/Klown_Buff ... 46591.aspx

I had a Boss tuner at the start of my chain but swapped it for a TC Polytune Mini which is true bypass....the buffer works well, actually colours the sound a little bit but in a nice way.

Re: Good buffer to place at the beginning of pedalboard

PostPosted: 16 Oct 2012, 22:15
by sinner

Re: Good buffer to place at the beginning of pedalboard

PostPosted: 16 Oct 2012, 22:26
by rocklander
I just use the black toast buffer at the start of my board.

Re: Good buffer to place at the beginning of pedalboard

PostPosted: 17 Oct 2012, 19:07
by Roast7
Because I wanted was the most appropriate to start the chain of pedals.
opamp vs jfet

opamp version is capable of giving lower output impedance (Z) and unity gain (gain = 1), Whereas the jfet's output impedance will be higher and slightly less than unity

which to choose? many people advises the jfet.

Re: Good buffer to place at the beginning of pedalboard

PostPosted: 19 Oct 2012, 10:37
by biliousfrog
Gain is fairly irrelevant unless it's a massive drop because it will always be on.

Re: Good buffer to place at the beginning of pedalboard

PostPosted: 19 Oct 2012, 12:34
by IvIark
This is one of the JFET buffers shown on the AMZ site, the one with the 1/2 supply voltage divider:

Image

Re: Good buffer to place at the beginning of pedalboard

PostPosted: 19 Oct 2012, 14:36
by Roast7
IvIark You think it's a good buffer transparent to the beginning of the chain of pedals?
What I want is something to put the correct impedance and does not color the sound.

Re: Good buffer to place at the beginning of pedalboard

PostPosted: 19 Oct 2012, 15:05
by IvIark
I haven't experimented with different types for quite a while, but if transparency is most important to you I'd probably recommend a generic opamp buffer. I thought the JFET buffers did colour the sound more.

Re: Good buffer to place at the beginning of pedalboard

PostPosted: 19 Oct 2012, 18:57
by Roast7
Already try this vero layout? if yes what kind of color it gives?

Re: Good buffer to place at the beginning of pedalboard

PostPosted: 19 Oct 2012, 19:48
by FiveseveN
Purple.

Re: Good buffer to place at the beginning of pedalboard

PostPosted: 19 Oct 2012, 20:17
by rocklander
I did what you are doing with this layout (not vero sorry, but shouldn't be hard for you to make one?)
viewtopic.php?t=2752&p=174536#p174536

Re: Good buffer to place at the beginning of pedalboard

PostPosted: 19 Oct 2012, 20:37
by Roast7
FiveseveN wrote:Purple.


Very funny :P

Well someone was making Veroboard jfet scheme, this pcb here:
http://www.muzique.com/tech/buffer.htm
Or even Veroboard this PCB


rocklander wrote:I did what you are doing with this layout (not vero sorry, but shouldn't be hard for you to make one?)
http://www.freestompboxes.org/viewtopic ... 36#p174536


This baja is like Amz?



I do not understand, but nobody uses buffers at the beginning of the chain of pedals??

Re: Good buffer to place at the beginning of pedalboard

PostPosted: 19 Oct 2012, 20:52
by FiveseveN
Roast7 wrote:I do not understand, but nobody uses buffers at the beginning of the chain of pedals??

Plenty do, in one way or another. I have onboard buffers in my guitars (JFET, like the one above). If you want to explore the kind of differences people think they hear just build a bunch of options (BJT, JFET, op amp) and compare them. It's $2 in parts.
If you're interested in best performance and not "color", whatever that means, build an op amp buffer with the biggest supply voltage you can muster (e.g. ±15 V, though 9 V is probably plenty for usual pickups).

Re: Good buffer to place at the beginning of pedalboard

PostPosted: 19 Oct 2012, 21:05
by rocklander
Roast7 wrote:
rocklander wrote:I did what you are doing with this layout (not vero sorry, but shouldn't be hard for you to make one?)
http://www.freestompboxes.org/viewtopic ... 36#p174536


This baja is like Amz?


never built the AMZ.. the pure sound of the black toast was good so I just used it

Roast7 wrote:I do not understand, but nobody uses buffers at the beginning of the chain of pedals??

yes.. many, as did I .. as posted in that link.

Re: Good buffer to place at the beginning of pedalboard

PostPosted: 20 Oct 2012, 00:00
by ppluis0
Roast7 wrote:Because I wanted was the most appropriate to start the chain of pedals.
opamp vs jfet

opamp version is capable of giving lower output impedance (Z) and unity gain (gain = 1), Whereas the jfet's output impedance will be higher and slightly less than unity

which to choose? many people advises the jfet.


Personally I would employ a tube buffer like this, but running with less high voltage:

Image

I think this diagram is similar to VHT/Fryette valvulator or Coopersonic tube cleaner.

Cheers,
Jose

Re: Good buffer to place at the beginning of pedalboard

PostPosted: 20 Oct 2012, 00:09
by FiveseveN
Why? That has absolutely none of the advantages of a 50 cent modern buffer.

Re: Good buffer to place at the beginning of pedalboard

PostPosted: 20 Oct 2012, 00:15
by sinner
ppluis0 wrote:
Roast7 wrote:Because I wanted was the most appropriate to start the chain of pedals.
opamp vs jfet

opamp version is capable of giving lower output impedance (Z) and unity gain (gain = 1), Whereas the jfet's output impedance will be higher and slightly less than unity

which to choose? many people advises the jfet.


Personally I would employ a tube buffer like this, but running with less high voltage:

Image

I think this diagram is similar to VHT/Fryette valvulator or Coopersonic tube cleaner.

Cheers,
Jose


I would love one myself :)

12v tubes are still possible to buy. 12U7 (dual triode) seems to be perfect candidate to become a base for battery powered friendly tube buffer

Re: Good buffer to place at the beginning of pedalboard

PostPosted: 20 Oct 2012, 00:36
by Roast7
I wanted something simple just to maintain the equal sign and good and transparent because the pedals are all in True Bypass.

That's why I thought the AMZ, because they say it all.
but I wanted to build myself and preferably in Veroboard.

Maybe I'll do it, like build a IvIark put here (jfet), and another with opamp, then choose.

Advice for other projects in stripboard, in addition to the layout IvIark posted???