[sdiy] Need help on Eventide Instant Flanger FL201

[cheater cheater]

I'd expect a phaser card to do the phaser thing.

Did you try mixing wet and dry signals? Maybe there's nothing to fix.

D.

On Sat, Sep 19, 2009 at 3:10 AM, Jean-Pierre Desrochers
<jpdesroc at oricom.ca> wrote:
> Hi List,
>
> It seams that my FL201 has an unusual "phaser card" installed
> instead of a standard BBD MN3001 delay card...
> Fortunalely to me the chips used are CD4066BCP, TL084, TL082, LM710CH
> (easy to debug I think..)
> But I wonder if I get this card working if I'll get a phaser sound
> instead of flanging effect... ??
>
>
>>
>> ----- Original Message ----- From: "Jean-Pierre Desrochers"
>> <jpdesroc at oricom.ca>
>> To: <Synth-diy at dropmix.xs4all.nl>
>> Sent: Friday, September 18, 2009 12:54 PM
>> Subject: [sdiy] Need help on Eventide Instant Flanger FL201
>>
>>
>>>
>>> Hi list,
>>>
>>> Recently I just bought an Eventide FL-201 Instant flanger and connected
>>> it
>>> between an Harman / Kardon tuner output
>>> and 1 input from my hifi amp to do some tests..
>>> Well I cannot get any flanging from the unit so far...
>>> Here is my setup:
>>> One of the tuner output (left) connected unbalanced
>>> to the (+) and C input screws repectively.
>>> The flanger Main output (+) and C screws connected
>>> to one of my hifi amplifier input still unbalanced.
>>> When the LINE switch is pulled out everything is bypassed (no effect) OK.
>>> When the LINE switch is puched in the LINE led lite OK.
>>> Moving all the controls one at a time the dedicated leds lit
>>> as supposed, the potentiometer called DOEPLER changes
>>> the overall volume, not else, no effect with all other pots.
>>> I read the flanger manual for the procedure to check
>>> if the incoming signal is strong enough using the ENVELOPE FOLLOWER pots
>>> and according to the book my incoming signal is strong enough.
>>> (I know that a weak signal won't result to a good flanging effect).
>>> The serial number is s/n 20785.
>>>
>>> Some months ago I ordered from Eventide a service manual
>>> for the Eventide FL201 Instant flanger.
>>> On receiving the manual I noticed the schematic missed
>>> the important board called the delay board that plugs in
>>> the center of the motherboard using an edge connector.
>>>
>>> Here are my questions:
>>> -A schematic of the delay board used in this unit
>>> would help me so much. If I can't get one I'll have
>>> to reverse engineer all this board to understand its workings.. Painfull.
>>> I'm ready to pay for that small board schematic.
>>> Next are some details for your help
>>> The motherboard behaves correctly. I mean all the IC's
>>> working with the potentiometers work. I can see with my scope
>>> the control voltage that drives the voltage controled clock
>>> that sweeps the delay board but in the delay board no clock found
>>> anywhere.
>>> The delay board uses these chips:
>>> 4 X CD4066BCN (supplied @ 7VDC)
>>> 3 X TL084 (supplied @ +/- 15vdc)
>>> 2 X TL082
>>> 1 X LM710CH
>>>
>>> - Is it normal there are no BBD delay chips on that board like most FL201
>>> have?
>>>
>>> - Can somebody sketch me a wiring connection to use with success
>>> mono unbalanced / stereo unbalanced?
>>>
>>> -Do I need to use both MAIN & AUX outputs together
>>> to get a flanging effect from a mono input?
>>>
>>> I use a lot of these type
>>> of machines with success but now I suspect a dead delay board...hope I'm
>>> wrong
>>> Your help is very important to me.
>>>
>>> J-P
>>>
>>>
>>> _______________________________________________
>>> Synth-diy mailing list
>>> Synth-diy at dropmix.xs4all.nl
>>> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
>>
>
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