Biyang - AD-7 Analog Delay

[Dirk_Hendrik]

a pt-80 clone, I guess.

Careful with remarks like this. They're similar to calling every dist with clippers in the feedback loop a TS clone.

The setup of compressor, filter, delay line, filter, expander for delay pedals is extremely common. Therefore when the delayline in that setup is replaced from a BBD chip by a PT2399 delay line doesn't automatically make it a PT80 clone.

Upsairs I have a EH DMM with the MN3005's bypassed and replaced by PT's. Does that make it a PT80 clone?

PLEASE!! Mr DIRK it would be a great idea for posting that adapter for replacing MN3005 with PTs!!!! some pictures or scheme to do that adaptation??? It would be fine

Eehrm.. "adapter"?? Not really. Adaption? Yes. that's correct.
But (there's always one),
What I did was not make a MN3005 to PT2399 conversion. At the time I wrote the text you quote above I had a DMM on the bench where the MN's were removed and their in and out PCB terminals connected to 2 filterless PT2399 boards. A PT2399 delayline without the filtering. The delay time control was in no way controlled by the DMM's delay and chorus/vib depth control.

To make a full, universal, MN3003 to PT2399 adapter means that one will need a freq to control current converter as well that converts the BBD clock from the original circuit to a control current controlling the PT2399's delay time. Good thing is that one gets rid of the BBD biasing.

[Liquitone]

Does anyone have information on whether the Akai Analog Custom Shop Analog Delay is identical to the Biyang AD-7 ? preferebly with a link to gutshots of the Akai? as I can't find any.

I just got off of the phone with tech support at Akai. The person I spoke with that that there is indeed a BBD chip in their custom shop analog delay. He said he wasn't sure which one it was, but told me that if I were to open up the pedal I would see a BBD chip. He played dumb when confronted with the question about them being manufactured by Biyang and rebranded with Akai graphics. So now I'm torn between just buying the Biyang AD-7 or the Akai.

Thanks for the info Nitegoat. The reason I am curious about it is because it got brought up on another forum, and I don't want to asume Akai is fooling us based on suspicions only, the thing is, I just can't shake of my suspicions until I've seen the guts, cause every sign points that way, I mean, 1000ms delay time on an analog delay?? I'm no expert on delay circuits, but could it be possible 1000ms is created with a BBD and a PT2399 working together somehow?