tremolo mods: half/ full speed, hard/ soft depth.

[Fuzzdawg]

i am building myself a tremolo and am desiring to include a half/ full speed stomp switch, as well as a "hard/ soft" stomp switch, like a Fulltone Supa Trem has.

i searched the history, but could not find exactly what i'm looking for.

if anyone knows what is required to perform these particular mods, please reply.  if you are wondering, i will be using a BYOC circuit board.

[Bucksears]

The Craig Anderton Tremolo is the best-sounding tremolo I've heard in a stompbox form. I built one for my cousin, but before giving it to him, I A/B'd it against the tremolo in my SRRI. Honestly, it sounded VERY very close (right down to the 'ticking' both trems make).

The only things I had a problem with on the CA Trem are:
1) You had to max out the level control to get to unity
2) The 'soft' waveform had a lower volume than the 'hard' setting.

You COULD use footswitches with it for full/half speed and hard/soft, I guess.
- Buck

[Bernardduur]

Try the 3ms tremulus lune; a GREAT tremolo pedal

[Fuzzdawg]

it's too late to change which tremolo i'm going to build.  i just want to know hot to mod it up!

[cd]

i will be using a BYOC circuit board.

Talk to the BYOC people or post on their forum.  That's what you paid the big bucks for.  Use their service and support!

[RaceDriver205]

Id recommend sine-wave modulation for your tremolo.
But that aside, you would need to find what resistance (in the Speed pot) gives you half speed. Then its just a case of having a stomp switch which connects this resistance in place of the pot.

[Fuzzdawg]

i have figured out, thanks to mostly skiraly, that for the 1/2 speed switch, i need to as a resistor in a switch that is half the value of the pot.

does anyone know if it's the same for the depth?  for instance, the depth pot for the tremolo is a 1 Meg pot.  would a 510k resistor be what i need for a good "hard/ soft" switch?  or should it be a lower (or higher) value?

[puretube]

I agree with CD...

they oughtta know what they clone, even though it`s not their own.

that`s their karma.


btw: that half-speed-resistor-thingy works only for the lowest speed 

for any other rate, that added resistor needs to know
to which actual value the pot is currently set to...
(a nice job for a PIC  ).

well - there`s an analog solution for that, too, of course...
I`m not sure however, whether I want to tell the clone-world that...
(would even be a double-/normal-/half- speed switchability,
including a stereopot - ooops...   )

[puretube]

sorry for hitting a newcomer, who actually would have to be heartily welcomed to the forum  , with such a harsh reply  ...

it was not against you, Fuzzdawg!

it only shows my dislike against cloning-for-money-sites.

(schemos for nothing, but kits for fee)

[Fuzzdawg]

i'm only using his board.  everything else i am sourcing myself.

[cd]

i'm only using his board.  everything else i am sourcing myself.

All the more reason to go post on the official BYOC forum.  Think about it: where are you going to get the best answers and the most help - a place where a few people know what you're talking about, or a place where they ONLY specialize in your exact product?  Where does the manufacturer want you to post?  On their board where they can debug their own product, or some other place where you'll get some "help" and possibly ruin their product, which creates even more headaches?

You paid BYOC a premium for easily, freely available information, you might as well pump them for support for their own product!

[Fuzzdawg]

yeah, you know what?

you're right.  thanks for absolutely no help at all.  i really appriciate it. 

and, by the way, i HAVE posted on the BYOC forum, and the people there have been much more HELP, as well as much FRIENDLIER.

so, why even post here?


well, because i figured, wrongly apperently, that i might be able to get some suggestions which might differ from those i received elsewhere, and could have more than one option that i could chose from, or even try more than one. 


i think BYOC is a brilliant business.  it introduced me to the world of DIY.

[spudulike]

Dont mind CD, he's all wind & piss lately.

The BYOC is the EA trem from GeneralGuitarGadgets, heres a snippet of the schem - replace the speed pot with a dual-gang pot and a footswitch wired like this. The switch parallels exactly the same resistance on the speed pot and gives a half (or double) speed option.   

[puretube]

I agree with CD...

they oughtta know what they clone, even though it`s not their own.

that`s their karma.


btw: that half-speed-resistor-thingy works only for the lowest speed 

for any other rate, that added resistor needs to know
to which actual value the pot is currently set to...
(a nice job for a PIC  ).

well - there`s an analog solution for that, too, of course...
I`m not sure however, whether I want to tell the clone-world that...
(would even be a double-/normal-/half- speed switchability,
including a stereopot - ooops...   )

well, ok - answers are there
couldn`t find the schemo, though...

[Processaurus]

the 25KA dual gang pot in the GGG mod schematic is the wrong taper, if you want the speed to increase as you turn it clockwise, it would be very jumpy at one end of the pots rotation.  Instead you want a dual reverse audio ("C" taper) pot.  Not exactly a Radioshack part, but you're in luck, because small bear has 100K C taper dual pots for uni-vibe clones.  I think 100K would work better than 25K, that seems too low for the stock values of the LFO in the GGG EA trem circuit to have a useful speed range.

I think its a good contribution to the DIY community that BYOC has the option of selling their PCBs a la carte, because I think they are the only company (except Jack Orman's minibooster boards) I've seen selling compact FX PCBs that are professionally manufactured (plated through holes, solder mask, silkscreen).   

PS, you might take a look at some innovative work thats been done recently on the EA design recently by Transmogrifox:
http://www.diystompboxes.com/smfforum/index.php?topic=43902.0

[Unbeliever]

You paid BYOC a premium for easily, freely available information, you might as well pump them for support for their own product!

I tend to agree - when I think of the 4ms kits everything is available on line (schematics, detailed - and reliable - mod instructions), not to mention free assistance. Now if the BYOC dude was to - hmmmm, register here and post here helpfully it might be different .... :^)

Now where did that 'entitlement' thread go?

[puretube]

surprise: there he is!

[RDV]

Aw heck, we're not friendly.

There's a whole lot of entitlement going on around here these days.

How dare we not dispense all our knowledge for free and with a smile!

I'm ashamed!

NOT.

Whatever happened to the "give" part of "give & take"?



RDV

[puretube]

Whatever happened to the "give" part of "give & take"?

RDV

the "give-part" is here, Rick!
(but it takes a 3pos switch... (somebody screamed "rotary"?)

[Dragonfly]

...its pretty easy to wire a DPDT or 3PDT switch to go between 2 pots, which can act as a "dual rate" control....while not necessarily (though it can be, with the right settings) working as a 1/2 speed switch, it *is* pretty handy...i've built ea trems with footswitches wired for both "dual rate" pots and "dual depth" pots...gives a whole lotta variabilty when you're onstage and need to change sounds/speeds quickly...