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Re: BAJA AC30TB overdrive pedal project 110218
Posted: 27 Feb 2018, 19:04
by HEAD
287m wrote:
===
Question :
Are Sprint user really just use some pict, load it and just tracing? Really easy like that?
and can clone whatever layout in speed of light?
Ask here, because i know there a lot of sprint user here.
And my friend who use sprint never talk much about this.
Yes. Exactly and as easy as this. Only hurdle is you have to convert the picture to oldschool .bmp before you can import it into sprint as scanned copy.
In general Sprint is a oldie but goldie. Very simple and convenient to use. Drawback: No schematic connection to help you (or confuse you
) when you're drawing a layout. Just much like the DIYLC but with some more sophisticated tools.
Re: BAJA AC30TB overdrive pedal project 110218
Posted: 28 Feb 2018, 14:06
by 287m
Aha. Demo version can do that?
If i buy sprint, 1 time payment to forever? No subscription?
i just love that copied feature and ability to multiple etch.
Eagle free is limited in board size. And i dont want KicaD since my lilbro use kicad.
Re: BAJA AC30TB overdrive pedal project 110218
Posted: 28 Feb 2018, 20:33
by bajaman
If i buy sprint, 1 time payment to forever? No subscription?
YES
Re: BAJA AC30TB overdrive pedal project 110218
Posted: 01 Mar 2018, 13:39
by FausterCraster
Hi, I built it and I'm happy with it.
Is there a way to let the Tone Pot cut more high ? I'd like to move the range more on middle-bass freq.
TX
Re: BAJA AC30TB overdrive pedal project 110218
Posted: 01 Mar 2018, 16:03
by Frank_NH
"Is there a way to let the Tone Pot cut more high ? I'd like to move the range more on middle-bass freq"
The tone control is simple LPF, so increasing the 6.8nF cap to 10nF or 22nF will cut more highs. Experiment and see what works.
Re: BAJA AC30TB overdrive pedal project 110218
Posted: 03 Mar 2018, 16:18
by 287m
Weekend question
its there a big difference if use 2u2 MLCC in tone control?
Space Save Sake!
Re: BAJA AC30TB overdrive pedal project 110218
Posted: 03 Mar 2018, 16:42
by marcao_cfh
I believe it'll work fine. But in my experience, usually they need almost the same space. Actually, the space between ceramic cap pins are bigger than between electrolytic cap pins, so ceramic caps needs a little bit of more space - but you can run a trace between the pins, which helps a lot when doing the layouts.
Re: BAJA AC30TB overdrive pedal project 110218
Posted: 04 Mar 2018, 23:58
by 287m
marcao_cfh wrote:I believe it'll work fine. But in my experience, usually they need almost the same space. Actually, the space between ceramic cap pins are bigger than between electrolytic cap pins, so ceramic caps needs a little bit of more space - but you can run a trace between the pins, which helps a lot when doing the layouts.
Marcos! 1590A-man, youre here too
MLCC is just same size with box caps, but not so smooth as film
i love, because they can stand side to side like a couple in love
look at two caps between low and high
here first draft
Re: BAJA AC30TB overdrive pedal project 110218
Posted: 05 Mar 2018, 13:58
by marcao_cfh
287m wrote:Marcos! 1590A-man, youre here too
That reminds me I didn't got time to build any of this awesome Baja series yet
287m wrote:here first draft
Nice layout!
Re: BAJA AC30TB overdrive pedal project 110218
Posted: 14 Mar 2018, 13:44
by FausterCraster
Baja,
I built a your VoxTB and this is not sounding good as your Plexi.... (my personal feeling)
It sound like Vox but it is not so much playable... gain is a bit like on/off switch and I like to increase the usability of this pedal.
I'd like to see Op-Amp for filtering Vbias (and this is easy to achieve... just coping from other schem), but most important
I'm wondering how much could be helpfull the "retro-fit" resistence that connect the last 2 op-amp (which value can it assume).
(BC547 can be replaced also by 1N4148 but this won't change a lot...)
is it possible to review the AC30 TopBoost schematic considering last "design style" used in Plexi & Highwatt ?
What you think ?
Re: BAJA AC30TB overdrive pedal project 110218
Posted: 14 Mar 2018, 19:43
by bajaman
Post subject: Re: BAJA AC30TB overdrive pedal project 110218 Reply with quote
Baja,
I built a your VoxTB and this is not sounding good as your Plexi.... (my personal feeling)
It sound like Vox but it is not so much playable... gain is a bit like on/off switch and I like to increase the usability of this pedal.
I'd like to see Op-Amp for filtering Vbias (and this is easy to achieve... just coping from other schem), but most important
I'm wondering how much could be helpfull the "retro-fit" resistence that connect the last 2 op-amp (which value can it assume).
(BC547 can be replaced also by 1N4148 but this won't change a lot...)
is it possible to review the AC30 TopBoost schematic considering last "design style" used in Plexi & Highwatt ?
What you think ?
I was intending to take another look at this - thank you for mentioning it
I have settled on a -60dB gain reduction for these complete amplifier models - the marshall 1959, 1959 fender bassman and Hiwatt DR103 were designed with this gain differential. i will publish an update to the Vox AC30TB very soon
cheers
bajaman
Re: BAJA AC30TB overdrive pedal project 110218 [documentation]
Posted: 14 Mar 2018, 23:38
by bajaman
You asked for it , so here it is the rev 2
lower gain and closer match. updated vero layout to follow soon
cheers
bajaman
Re: BAJA AC30TB overdrive pedal project 110218
Posted: 15 Mar 2018, 09:15
by ct_anthony
Is it possible to get an update of the normal channel, too?
Re: BAJA AC30TB overdrive pedal project 110218
Posted: 15 Mar 2018, 09:19
by bajaman
Baja Vox AC30TB vero rev 2
- Baja AC30TB rev 2 vero cuts.png (7.19 KiB) Viewed 4352 times
Re: BAJA AC30TB overdrive pedal project 110218
Posted: 15 Mar 2018, 09:27
by bajaman
ct_anthony wrote:Is it possible to get an update of the normal channel, too?
https://www.freestompboxes.org/download/ ... &mode=view
Re: BAJA AC30TB overdrive pedal project 110218
Posted: 15 Mar 2018, 21:35
by bajaman
Here are some graphs showing the tube amplifier (top trace) and the 9v pedal - note the correlation of phase and frequency between 80Hz and 10KHz
I try to keep the output level -60dB compared to the actual tube amplifier - limitation with 9v power supply
All gain and tone controls set to maximum except tone cut which is set to minimum.
cheers
bajaman
Re: BAJA AC30TB overdrive pedal project 110218
Posted: 17 Mar 2018, 22:06
by FausterCraster
This is my VERIFIED 24x18 PCB for AC30TB, enjoy !!
Re: BAJA AC30TB overdrive pedal project 110218
Posted: 17 Mar 2018, 22:19
by FausterCraster
Baja,
this pedal sound like AC30TB .... SUPER !!!!
Pedal is overall very good !
On mid & low tone setting pedal is almost perfect !!!
There is still some room for improvment
On high tone setting ( in both ways: rising tone cut or rising high only )
after the main note/accord sound there a kind of granular feedback noise like a german fuzz pedal
What you think ?
TX
Re: BAJA AC30TB overdrive pedal project 110218
Posted: 29 Aug 2018, 14:06
by johngovan1234
I think this will help. Toner transfer Stripboard already have cuts.
Re: BAJA AC30TB overdrive pedal project 110218
Posted: 30 Aug 2018, 10:54
by HENK
johngovan1234 wrote:I think this will help. Toner transfer Stripboard already have cuts.
An empty Board ???
