Vibrato/Tremolo/Tomatoe/Dan'o ......

[MartyMart]

So why do we call the "vibrato" arm on a guitar a "tremolo arm" ? that always
puzzles me !
Vibrato = "pitch" modulation

Tremolo = "Amplitude" or "Volume" modulation

You bend a string up/down its vibrato, you pull it tighter/slacker its vibrato.

Anyway, just thought that I'd mention all that and say that I just picked up a cheap
"Dano" Chicken Salad Vibrato and it does quite a convincing "Univibe" tone, in fact
I'd say that it sounds richer than both my DIY "EasyVibe" and "Phase 45/Univibe" !!

..... now I'm pissed 

It has that nice rich combo of "Phase/Vibrato" but with a slight low end volume "pulse"
too, which seems the only problem, apart from the switch/jacks lasting about a week !!

I still think this is "wrong terminology" for the effect though ..
"Vibrato" should be just "pitch" mod with no other "tonal" changes, as mentioned above.
The best effect I have for this is my "Pearl CH-02" chorus pedal, which has a wet/dry
mix control.
When set to 100% wet, its pure "pitch" modulation - hence VIBRATO  !!

End of rant   

Marty.

[MartyMart]

Oh, one other thing, it "Ate" a new 9v battery in about an hour !
Made the effect stop working, which gave me a shock, battery now
reads only 8.02 volts !
Must be the "Lamp" used so it's PSU only folks !!
Give's it that "mojo" tone though

Marty.

[d95err]

On the other hand, tremolo is sometimes misnamed as "vibrato" on older amps or effects, so I suppose it kind of evens out...

[BDuguay]

Yahoo! A thread I can contribute to 
I'll do you one better Marty. I got a Chicken Salad for free, the problem being that it didn't work. The owner had checked everything out and narrowed it down to the light bulb. I changed it with what I thought would work and experienced the same low end volume 'pulse' as you described. After some experimenting, I discovered the pulsing  occured at the peek of the bulbs brightness. I consulted my EE colleagues here at work and we determined that I needed change the bias of the bulb driver transistor. It was originally 4.7k. I found 15k got rid of the pulsing.
I recall, when changing the original burnt out light bulb, that it seemed like it had a 'smoked' lense. I can't say for sure because it was glued into that tiny black shroud and I destroyed the bulb trying to remove it, but that may have reduced the brightness enough for the circuit to work properly.
Your right about the vibe comparisons. The circuit is like a cross between a real Uni-vibe and an Easy Vibe.
B.