I made up a battery supply , 3xAA alkalines in series ,
the weakness of the current supplying capacity of the battery showed itself as even earlier breakdown into oscillation on hi-z mode , the dominant discordant note in the intermodulated mess that resulted was gone .
On mic input even better results , not really a measurable difference in overall averaged noise level , but a more white noise like backround mush , more random , less fizzly with harmonics .
I dug out a 57 for comparative purposes , up close through a flat eq'd channel as you'd expect , a little woolly in the bass , still crisp and clean in the top end though and extremely low noise .
There is a couple of headers on the back edge of the pcb , one marked JTag one PWR ,
I'll have a poke around with the meter tomorrow and note down what I find.
Would be interesting to find out from anyone else if the SSL2 willingly goes into oscillation on high -z mode with the gain cranked and nothing connected , maybe its a foible with my particular unit ,
In any case audio equipment with nothing connected should never break into spurious osscillation at any setting of the controls , typically in a guitar amp input is grounded as soon as the jack dissconnects , you would think a Neutrik combo socket does the same by default ,
Theres a few weird things I discovered , if I make contact with the underside of the hi-z switch or terminals on the input socket the oscillation momentairliy goes away , having Mhz bandwidtch on a DI input is questionable .
I might try a few pF's to ground across the unbalanced input jack to try and neutralise the misbehaviour ,
the weakness of the current supplying capacity of the battery showed itself as even earlier breakdown into oscillation on hi-z mode , the dominant discordant note in the intermodulated mess that resulted was gone .
On mic input even better results , not really a measurable difference in overall averaged noise level , but a more white noise like backround mush , more random , less fizzly with harmonics .
I dug out a 57 for comparative purposes , up close through a flat eq'd channel as you'd expect , a little woolly in the bass , still crisp and clean in the top end though and extremely low noise .
There is a couple of headers on the back edge of the pcb , one marked JTag one PWR ,
I'll have a poke around with the meter tomorrow and note down what I find.
Would be interesting to find out from anyone else if the SSL2 willingly goes into oscillation on high -z mode with the gain cranked and nothing connected , maybe its a foible with my particular unit ,
In any case audio equipment with nothing connected should never break into spurious osscillation at any setting of the controls , typically in a guitar amp input is grounded as soon as the jack dissconnects , you would think a Neutrik combo socket does the same by default ,
Theres a few weird things I discovered , if I make contact with the underside of the hi-z switch or terminals on the input socket the oscillation momentairliy goes away , having Mhz bandwidtch on a DI input is questionable .
I might try a few pF's to ground across the unbalanced input jack to try and neutralise the misbehaviour ,