Minion
Well-known member
Hi Folks, I just aquired some electronics parts for pretty cheap but I don"t know much about them or if they are even usefull....
I just got 6 new Mini audio Transformers for $4 that are used in Telecomunications...Thjey seem to be 1:1 Ratio as they have a 30ohm primary and a 30ohm secondary....
These were the specs I could get from them...
amorphous alloy laminations
Core size 15 mm x 12 mm x 4 mm
Center leg cross sectional area: 16 sq. mm
Each winding has about 700 turns of 36 AWG wire, and has an inductance of 1.6 H (Henries)
Frequency response is from 20Hz to 1MHz.
There is a resonance peak at 644 KHz, as observed on an oscilloscope. Response starts to fall above 900 KHz at about 40dB/decade, as core losses take over.
Would these Transformers be usefull for any audio type stuff?? Like as Input or output transformers in Mic preamps?? It seems that the frequency responce seems pretty good (20hz to 1Khz) which covers the audible audio range.....
Any suggestions on these would be great.....
Next I got a couple LM3886 Power opamps that I was thinking of useing to build a Guitar amp out of....Would these be good for that purpose?? I have a 100vA Torroidal transformer (18v,0v,18v @2.38Amps) would that be enough power for a 50w amp useing this transformer.....
Do you folks happen to know of a schematic for a simple Guitar or Bass amp that uses this Chip???
My last set of questions are about these Opamps that I picked up and I know very little about them but they seemed interesting so I grabbed them....
They are called "TC913" opamps and they are "Dual Auto Zero Opamps" they claim to have "Zero Offset Voltage"Zero Drift" and over 100db PSRR..
Here is the DataSheet:
http://ww1.microchip.com/downloads/en/DeviceDoc/21482C.pdf
Can I use these Opamps the same way I would use any Dual Opamp like a NE5532?? Or are these only used in certain circuits??
Any infor on these Chips would be very usefull....
ThanX a Lot Guys.....
I just got 6 new Mini audio Transformers for $4 that are used in Telecomunications...Thjey seem to be 1:1 Ratio as they have a 30ohm primary and a 30ohm secondary....
These were the specs I could get from them...
amorphous alloy laminations
Core size 15 mm x 12 mm x 4 mm
Center leg cross sectional area: 16 sq. mm
Each winding has about 700 turns of 36 AWG wire, and has an inductance of 1.6 H (Henries)
Frequency response is from 20Hz to 1MHz.
There is a resonance peak at 644 KHz, as observed on an oscilloscope. Response starts to fall above 900 KHz at about 40dB/decade, as core losses take over.
Would these Transformers be usefull for any audio type stuff?? Like as Input or output transformers in Mic preamps?? It seems that the frequency responce seems pretty good (20hz to 1Khz) which covers the audible audio range.....
Any suggestions on these would be great.....
Next I got a couple LM3886 Power opamps that I was thinking of useing to build a Guitar amp out of....Would these be good for that purpose?? I have a 100vA Torroidal transformer (18v,0v,18v @2.38Amps) would that be enough power for a 50w amp useing this transformer.....
Do you folks happen to know of a schematic for a simple Guitar or Bass amp that uses this Chip???
My last set of questions are about these Opamps that I picked up and I know very little about them but they seemed interesting so I grabbed them....
They are called "TC913" opamps and they are "Dual Auto Zero Opamps" they claim to have "Zero Offset Voltage"Zero Drift" and over 100db PSRR..
Here is the DataSheet:
http://ww1.microchip.com/downloads/en/DeviceDoc/21482C.pdf
Can I use these Opamps the same way I would use any Dual Opamp like a NE5532?? Or are these only used in certain circuits??
Any infor on these Chips would be very usefull....
ThanX a Lot Guys.....