convert Quad44 radio input to CD input - Page 2

Blue · 14th November 2004, 12:52 PM

The input buffers on the 44 and later 34s certainly do enable a myriad of input sensitivities and impedances, they even made microphone input modules for the 44 but are the buffers just masking a problem with or easing the PCB layout as well as complicating the signal path ??

http://www.dc-daylight.ltd.uk/Valve-...D-34-Mods.html

ACD...

Note QUADs deliberate use of asymetric supplies used on the QUAD34 to give a small +ve offset at the op-amp outputs. Did you account for this when you removed all the capacitors ? Also you quote response to dc after the mod, did you throw out the tilt/bass controls just so you could see your speaker cones waft back and forth once a week when driven from a VLF generator !

More seriously if your QUAD 34 was an early one with single op-amps did you measure the cross talk at any time ??

Blue · 5th March 2005, 02:33 PM

Well I'm back after a short break and no reply, could it be the Dutchman has flown ??

Blue

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14th November 2004, 12:52 PM	#11
Blue diyAudio Member Join Date: Nov 2004 Location: Grand Cayman	The input buffers on the 44 and later 34s certainly do enable a myriad of input sensitivities and impedances, they even made microphone input modules for the 44 but are the buffers just masking a problem with or easing the PCB layout as well as complicating the signal path ?? http://www.dc-daylight.ltd.uk/Valve-...D-34-Mods.html ACD... Note QUADs deliberate use of asymetric supplies used on the QUAD34 to give a small +ve offset at the op-amp outputs. Did you account for this when you removed all the capacitors ? Also you quote response to dc after the mod, did you throw out the tilt/bass controls just so you could see your speaker cones waft back and forth once a week when driven from a VLF generator ! More seriously if your QUAD 34 was an early one with single op-amps did you measure the cross talk at any time ??

5th March 2005, 02:33 PM	#12
Blue diyAudio Member Join Date: Nov 2004 Location: Grand Cayman	Well I'm back after a short break and no reply, could it be the Dutchman has flown ?? Blue

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