I SEE...
Hi,
On the secondary side it will look at the input impedance of the amp + the cable's properties.
So,in order to drive all this properly the secondry side of your step down xformer should be an order of magnitude lower than the input impedance of the amp.
Often a value of 600 Ohm is chosen for this as this is the pro standard for balanced operation.
Cheers,
Hi,
On the secondary side it will look at the input impedance of the amp + the cable's properties.
So,in order to drive all this properly the secondry side of your step down xformer should be an order of magnitude lower than the input impedance of the amp.
Often a value of 600 Ohm is chosen for this as this is the pro standard for balanced operation.
Cheers,
Hi again and thanks again Frank. ;-)
Ok so as this is gonna be a preamp...
This is what I should tell my tranny builder.. :
1.) SE transformer
2.) The core may be fairly small...no DC and fairly small voltages. (Maybe around 1 watt max?)
3.)Output impedance 600ohm or lower?
4.) Primary or reflected impedance as high as possible without affecting hf response. (say should only drop of after 25kHz)
Cheers,
Bas
Ok so as this is gonna be a preamp...
This is what I should tell my tranny builder.. :
1.) SE transformer
2.) The core may be fairly small...no DC and fairly small voltages. (Maybe around 1 watt max?)
3.)Output impedance 600ohm or lower?
4.) Primary or reflected impedance as high as possible without affecting hf response. (say should only drop of after 25kHz)
Cheers,
Bas
PARAFEED OPT.
Hi,
1.) SE transformer
2.) The core may be fairly small...no DC and fairly small voltages. (Maybe around 1 watt max?)
3.)Output impedance 600ohm or lower?
4.) Primary or reflected impedance as high as possible without affecting hf response. (say should only drop of after 25kHz)
I'm pretty sure that the xformer builder we have in mind has done this before.
2)If it must be a parafed job than,yes.
3)Going lower than 600 Ohm will only add to the step down ratio,and degrade performance IMO.
4)Yes,something like 15K should be fine.Bandwidth as large as possible,I'd say.
Ciao,
Hi,
1.) SE transformer
2.) The core may be fairly small...no DC and fairly small voltages. (Maybe around 1 watt max?)
3.)Output impedance 600ohm or lower?
4.) Primary or reflected impedance as high as possible without affecting hf response. (say should only drop of after 25kHz)
I'm pretty sure that the xformer builder we have in mind has done this before.
2)If it must be a parafed job than,yes.
3)Going lower than 600 Ohm will only add to the step down ratio,and degrade performance IMO.
4)Yes,something like 15K should be fine.Bandwidth as large as possible,I'd say.
Ciao,
- Status
- This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.