MXR EVH 117 Flanger
Posted: 28 Mar 2013, 11:30
I have an EVH 117 flanger in for repair. I can take some pictures if someone is interested. It uses a (weird) v3204 dunlop branded BBD device..
Not unless you ask MXR for one.Coolcat0078 wrote:So I guess this hasn't got a direct replacement?
My guess would be to simply lower noise in a BBD based circuit, same as it does in a delay.POTL wrote:Yes, but why is it needed in the flanger circuit?
It is used in analogue delays, in the original scheme with sad1024 it was not used.
http://rudn.nodevice.com/preview/big/373/373202-1.jpg
I concur, the circuit is obviously quite different to the original, this uses a 512 stage BBD but the original used the SAD1024 in series mode so 1024 stage BBD... maybe rather than get two types of BBDs they just increased the delay length from half the stages and then needed to cut the noise down that introduced. Who knows without a schematic and/or clock readings though.Ice-9 wrote:My guess would be to simply lower noise in a BBD based circuit, same as it does in a delay.POTL wrote:Yes, but why is it needed in the flanger circuit?
It is used in analogue delays, in the original scheme with sad1024 it was not used.
http://rudn.nodevice.com/preview/big/373/373202-1.jpg
It seems even more strange why use the rare component mn3204 and expensive sa572 if you could just set nm3207 or nm3007 and get a 1024 stage BBDScruffie wrote:I concur, the circuit is obviously quite different to the original, this uses a 512 stage BBD but the original used the SAD1024 in series mode so 1024 stage BBD... maybe rather than get two types of BBDs they just increased the delay length from half the stages and then needed to cut the noise down that introduced. Who knows without a schematic and/or clock readings though.Ice-9 wrote:My guess would be to simply lower noise in a BBD based circuit, same as it does in a delay.POTL wrote:Yes, but why is it needed in the flanger circuit?
It is used in analogue delays, in the original scheme with sad1024 it was not used.
http://rudn.nodevice.com/preview/big/373/373202-1.jpg