Forum-Vibe . . . . no oscillation

[R.G.]

It's like Arthur Conan Doyle said, through Sherlock. "Eliminate the impossible, dear Watson, and whatever remains, no matter how improbable, must be the truth."

[RedHouse]

Fastocker, send me your board and I'll fix it for you. I've been really busy and didn't see your troubles (this thread) until now. Hundreds have successfully built these, there must be something particular to your build giving you this trouble.

RG, thanks for helping Fastocker. I can see you've gave it the 'ol college try, well done.

[Fastocker]

Thank you, Redhouse -- I really appreciate your generous offer.  I'm going to revisit the board a bit this weekend just to recheck wiring, component values and such . . . if it still doesn't work, I'll ship it to you early next week for diagnosis.

And much thanks to R.G. as well!

Fastocker, send me your board and I'll fix it for you. I've been really busy and didn't see your troubles (this thread) until now. Hundreds have successfully built these, there must be something particular to your build giving you this trouble.

RG, thanks for helping Fastocker. I can see you've gave it the 'ol college try, well done.

[Fastocker]

Just as a follow up to this thread . . . I couldn't find the problem with the Forum-Vibe so I accepted Brad's offer and sent him the pedal to repair.  He found the problem in minutes -- I had the wrong value resistor for R40 (4k7 somehow instead of a 2M2).   

Actually, only a little embarrassed -- I've made mistakes before and will make them again . . . and no animals were harmed in the making of this pedal.  During my troubleshooting I was focused on wiring and transistors and not so much resistor or cap values.  Hopefully someone can use this info for a future build.  Thanks to Brad for finding the problem so quickly!

[Jdansti]

Wow-I just read this thread today, and as I was reading I began to think, "check the values of all of the resistors". This thought did not occur to me because I am a genius, which I'm not!  It occurred to me because I had just built a circuit that did everything it was supposed to do, including giving all of the correct voltages, except it didn't modify the signal (in my case it was a compressor).  After almost giving up, someone on the forum noticed a wrong value for a resistor on a photo of my board. At that point I checked all of the resistors and found that another one was wrong.  After correcting those mistakes, it worked like a champ.

I guess the lesson for us is that the simplest mistakes are the ones we don't think about checking (although RG mentioned the possibility of a wrong resistor value on May 12.    This further illustrates how we assume that all of the simple stuff was done right.

Glad you got it figured out! 

[RedHouse]

Just as a follow up to this thread . . . I couldn't find the problem with the Forum-Vibe so I accepted Brad's offer and sent him the pedal to repair.  He found the problem in minutes -- I had the wrong value resistor for R40 (4k7 somehow instead of a 2M2).  

Actually, only a little embarrassed -- I've made mistakes before and will make them again . . . and no animals were harmed in the making of this pedal.  During my troubleshooting I was focused on wiring and transistors and not so much resistor or cap values.  Hopefully someone can use this info for a future build.  Thanks to Brad for finding the problem so quickly!

Whoever said "don't sweat the small stuff" was an idiot, it's always the small stuff that bites us in the backside. Mis-placed parts are the #1 build-bummer, happens to all of us ...randomly.

Just the other day I was wiring-up a Strat after replacing pots/switch etc, put the whole darn thing together, strung it up, and ...hmmm... tone controls working funny, was shunting the signal volume.

Opened it back up and found that I had inadvertantly soldered a ground wire to the tone pot where the cap goes (cap was there too) so when the tone pot was turned down it was grounding out the signal...duhhh. I've been working on these guitars since 1976 and should know better by now.

{start rant...
Which brings me to one of those Dennis Miller/George Carlin moments, it just annoys me that a Strat's scratchplate is under the strings and you have to remove the strings to deal with the electronics. I bet if Leo was musician, and had to buy his strings when he was young, he would have made his darn guitars .....with a back plate! (SG style).
...end of rant}

[poorboy]

Hi all..i've build the Forum-Vibe RedHouse mod...
and i Have the same Fastlocker problem with LFO..
the real problems is..the part list!!!
I've put the wrong resistor in  R40: 4k7 instead the 2M2......coincidence???
No..get a look at the part list...
check here: http://classicamplification.net/forumvibe/fv_rh_09.htm

Forum-Vibe "RedHouse Mods" Parts List
Part / Value    Qty    Part Designation    Example Part
Numbers

4k7Ω    17    R8,R11,R15,R16,R17,R21,R22,R23,R27,R28,R29,R39,R40,R45,R46,R48    M# 271-4.7k-RC[/glow]

2M2Ω    1    R40    M# 271-2.2M-RC

I hope that helps...
Monday i will buy the right resistor..and hope that my Vibe will works..bye!
p.s im sorry for bad english...

[RedHouse]

Hi all..i've build the Forum-Vibe RedHouse mod...
and i Have the same Fastlocker problem with LFO..
the real problems is..the part list!!!
I've put the wrong resistor in  R40: 4k7 instead the 2M2......coincidence???
No..get a look at the part list...
check here: http://classicamplification.net/forumvibe/fv_rh_09.htm

Forum-Vibe "RedHouse Mods" Parts List
Part / Value    Qty    Part Designation    Example Part
Numbers

4k7Ω    17    R8,R11,R15,R16,R17,R21,R22,R23,R27,R28,R29,R39,R40,R45,R46,R48    M# 271-4.7k-RC[/glow]

2M2Ω    1    R40    M# 271-2.2M-RC

I hope that helps...
Monday i will buy the right resistor..and hope that my Vibe will works..bye!
p.s im sorry for bad english...

Sorry, I'll need to fix that list.

[poorboy]

Dont worry Redhouse.. now my LFO works..
I just have a big noisy problem...
The Vibe buzz if on.. but buzz too without dc power and in bypass.. ideas? 

[poorboy]

i've open a new topic for this problem..