Mod your Beresford 7520

Quote:

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Originally Posted by mwahahaha

Definitely - Stan what are your feelings on the additional cap?

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It's a must.

Quote:

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Originally Posted by Covenant

So we have a new kid on the block, the LT1364.

One of the mods or Stan should tell us if its suitable-some details:
GBP 70MHz
Slew-Rate 1000V/μs
Supply Voltage ±2.5 → ±15V
Package SOIC8
CMRR 76dB
Function Unity-gain stable, voltage-feedback
Operating Temperature Range -40 → +85°C
Settling time ns to % 50 → 0.1
V Offset mV 1.5

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The THS4032 has a V offset of 0.5mV and a CMRR of 100dB

Quote:

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Originally Posted by Sensimilia

It's a must.

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Thanks Stan, do you fancy adding an accessory to your online store of the opamp, adaptor board and soldered cap?;)

Also how's that power supply getting along - weren't you testing a sample a while back?

Quote:

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Originally Posted by mwahahaha

Thanks Stan, do you fancy adding an accessory to your online store of the opamp, adaptor board and soldered cap?;)

Also how's that power supply getting along - weren't you testing a sample a while back?

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I'd be up for that too.

Quote:

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Originally Posted by mwahahaha

Thanks Stan, do you fancy adding an accessory to your online store of the opamp, adaptor board and soldered cap?;)

Also how's that power supply getting along - weren't you testing a sample a while back?

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Id be up for the THS4032 / board / cap combo I meant.

So what about this one Stan?
The OPA2111KP available from Farnell at about £15 and looks like it doesnt need the interface which is putting me off a bit:

OP AMP, DUAL, LOW NOISE
Amplifiers, No. of:2
Gain, Bandwidth -3dB:2MHz
Slew Rate:2V/µs
Voltage, Supply Min:10V
Voltage, Supply Max:36V
Case Style:PDIP
Pins, No. of:8
Temperature, Operating Range:-40°C to +85°C
Bandwidth, Gain:2MHz
Base Number:2111
Current, Iqc Max:9mA
Temp, Op. Max:70°C
Temp, Op. Min:0°C
Time, Settling:10µs
Voltage, Input Offset Max:5mV
Voltage, Supply +Nom:18V

Any problem just fitting one?

Quote:

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Originally Posted by Covenant

So what about this one Stan?
The OPA2111KP available from Farnell at about £15 and looks like it doesnt need the interface which is putting me off a bit:

OP AMP, DUAL, LOW NOISE
Amplifiers, No. of:2
Gain, Bandwidth -3dB:2MHz
Slew Rate:2V/µs
Voltage, Supply Min:10V
Voltage, Supply Max:36V
Case Style:PDIP
Pins, No. of:8
Temperature, Operating Range:-40°C to +85°C
Bandwidth, Gain:2MHz
Base Number:2111
Current, Iqc Max:9mA
Temp, Op. Max:70°C
Temp, Op. Min:0°C
Time, Settling:10µs
Voltage, Input Offset Max:5mV
Voltage, Supply +Nom:18V

Any problem just fitting one?

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Have you tried the LME49720 yet?

Not yet Trailer, the only one I have tried up to now is the 4562 which sounds great in my system. I am tempted to buy one of each as its unlikely I will use headphones much.

It seemed to take a while for the 49720's to run in but I definitely prefer them now to the 4562's.

I've got some 4032's coming in the next day or two so I'll let you know how I get on with them too.

Great-I wish they gave them names rather than numbers-I have to read back on the thread to remember which one is which.
A sticky with a list of them and peoples opinion would be very useful.