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Old 27th September 2006, 04:07 PM   #1
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Default UCD 180 input buffer

Hi!
I will order the UCD 180 modules without op amp. I would like to know if it is possible to ad separated, maybe discrete op amp. Anyone experienced this?
Thanks Miha
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Old 27th September 2006, 04:23 PM   #2
RX5 is offline RX5  Philippines
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hmmmmm I have not seen a discrete "op amp" YET..... not even close to a 741...
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Old 27th September 2006, 04:26 PM   #3
BWRX is offline BWRX  United States
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No doubt it could be done, but you would need some kind of SO8 adapter to make that work.
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Old 27th September 2006, 04:35 PM   #4
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Quote:
Originally posted by RX5
hmmmmm I have not seen a discrete "op amp" YET..... not even close to a 741...
I've made and used discrete op amp in preamps that sounds much better then integrated. Examples are 990, 2520, Melcor...

Where is placed op amp in UCD? Is it soldered directly to pcb or not?
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Old 27th September 2006, 05:43 PM   #5
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i think it IS the small board in the main board of UCD....
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Old 27th September 2006, 07:12 PM   #6
BWRX is offline BWRX  United States
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The input buffer is an SO8 op amp. The upgraded modules use the AD8620.

That daugther board is the top secret modulator circuit, hence the potting.
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Old 28th September 2006, 02:07 AM   #7
RX5 is offline RX5  Philippines
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Quote:
Originally posted by BWRX
The input buffer is an SO8 op amp. The upgraded modules use the AD8620.

That daugther board is the top secret modulator circuit, hence the potting.
so thats where it is
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Old 28th September 2006, 04:50 PM   #8
RX5 is offline RX5  Philippines
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Brian,

MPSA92(on daughterboard).... for?
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Old 28th September 2006, 05:38 PM   #9
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Thanks for the replys. I think i will keep the NE5532 and use my own power supply. NE are ok, i used them for many preamps compressors..I listened to some tests with AD8620 vs NE5532 and i would say the AD is too bright, enhanced in some way. They wouldn't go with studio monitors i use.
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Old 28th September 2006, 06:38 PM   #10
BWRX is offline BWRX  United States
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I don't know exactly what the MPSA92 is for. I only read that the daughter card contains the UCD modulator circuit components, so it's certainly part of the modulator circuit.

NE5532s sound ok in my op amp preamp, but I like the sound of the TL072s better. That would be another very cheap option you could try.
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