Question about Pumpkin preamp: can it be made with FQP4N20 and FQP7P06 instead IRF-s. Or should I go for IRF
compare voltages , capacitances and xconductance
I presume that IRF's are easy to find , wherever you are ( Cro or abroad ) so I can't see why banging head about ;
if you look for Generg's
, you can find that he put Zhoufang's small Toshiba mosfets instead IRF9510
I presume that IRF's are easy to find , wherever you are ( Cro or abroad ) so I can't see why banging head about ;
if you look for Generg's
, you can find that he put Zhoufang's small Toshiba mosfets instead IRF9510The biggest difference is in xconductance so that I ask FQP has higher xconductance and VGS(th)(4-5)V(FQP4N20) one and the other (3-4)V(FQP7P06)
you'll hardly hear difference because of xconductance difference , because of closed loop operation ; you remember that Pumpie is SUSY .
you can hear difference using Toshibas instead 9510 , because they're less 'switch-like " parts , than IRFs
( transfer curve issue )
lower ones , in CCS position - you can use whatever you have - they're just CCS
you can hear difference using Toshibas instead 9510 , because they're less 'switch-like " parts , than IRFs
( transfer curve issue )lower ones , in CCS position - you can use whatever you have - they're just CCS
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