Oh, is there more difference than meets the eye between them?Quote:
Originally Posted by leo
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Oh, is there more difference than meets the eye between them?Quote:
Originally Posted by leo
Yes. They are two different products, but with a 'family' resemblance.Quote:
Originally Posted by MartinT
Stan
ATTN: DaveC.
Dave was kind enough to loan me a selection of opamps to try in my "Caimanised" 7520, finally got around to trying them out today.
They were:
OPA134PA
NE5332N (Different make from Stans originals)
4971ONA
My Dac has the MCL5 and 6 capacitor legs snipped on the output board as well as the Wolfsen Dac transplant.
I was running LM4562 op-amps in both line and headamp sockets.
Unfortunately it wasn't much of a test, as for some reason the OPA134PA and the 4971ONA both were very distorted and only coming out of one channel.
Now, I dont know if this is because I snipped the Caps on the oputput board or what, but I couldn't make any judgement about these Op-Amps in the Caiman spec Dac.
The standard 7520-fit NE5332 though.... in comparison to the LM4562's were just not in the same class.
Far more clarity, whallop, soundstage depth...you name it.
So sorry Dave, not much to report!
I'll get 'em in the mail tommorow!
Gary.
Hi Gary,Quote:
Originally Posted by Gazjam
They were given to me FoC by a fellow AoS member who, I believe, had them left over from his op-amp rolling activities (on a standard 7520 I believe) which may be evidence in support of your findings. If the kind donor of the op-amps wants to contribute to this thread it may be helpful. My memory has retained the name of the donor (for a change :) ) but I'd rather not name him - seems ungrateful but I'm truly not, it's just that I've realised my statement above may be open to that (mis)interpretation.
Cheers,
It COULD just be dave that without the 5/ 6 caps in place on the output board those OpAmps just dont work properly.
Says Gary, showing his ignorance of all things electronic!
Incase I missed something somewhere and just to remind that OPA134PA and 4971ONA are SINGLE op-amps not duals, you need to use two each of those in a browndog socket for stereo.
Example OPA134 mono, OPA2134 stereo
THAT explains why they were only working on one channel!
Thanks for that Leo.
Although there was some signal coming through the other speaker?
Was this signal leakage maybe, or something else?
Hi Gaz,
Would that explain what the little PCB thingy was - a browndog adapter to enable two such op-amps to be fitted into one socket maybe?
If so, would you like me to send everything back to you?
Cheers?
Yep, theres NFB resistors so if theres no op-amp you'll get a very low signal
If you like either of those op-amps just get the dual version, it saves faffing about with converter boards;)
Some op-amps aren't available in duals but those ones you have are
And, as an added bonus, the lid on the 7520 will close also, presumably? ;)Quote:
Originally Posted by leo
Cheers,