Paradise Builders

[Simon1972]

Or, float the input and output sockets on the paradise, so signal gnd has no chassis bond. And run the chassis back to mains 0v via a DDRC.

If there's continuity between gyrodeck chassis and tonearm you don't need another gnd just that 3rd wire in the arm.

 

[metallicus69]

I tried to search without success through all the threads. Is it possible to decrease the gain of this preamplifier? I use a cartridge with 0,5mV nominal and the output is still undistorted, but the value is quite high. I cannot use the whole range of the volume control of the next stage. Thanks in advance!

 

[as_audio]

It is possible to reply if we know which schematic you use.

 

[metallicus69]

Thanks! I use the first schematic, I built the preamplifier in 2013, without the Calvin buffer

 

[as_audio]

I can not help you without a link or picture of the schematic.

 

[Simon1972]

The circuit and components have remained unchanged since rev1

 

[as_audio]

I will not do the work of this gentleman and search myself.

 

[metallicus69]

Fair enough. Post #13 documentation
This is the schematic I used.

 

[as_audio]

With this schematic you can not change the gain easily.
RIAA network is the load and determines gain.