[craigmorris74]

I want to put together a pair of either into preamps.  Has anyone compared the sound of these cards?

Thanks,

Craig

[Brown Note]

here's the lab thread link.  for some reason it doesn't come up using the search function anymore.  i had to google it.

http://www.groupdiy.com/index.php?topic=11466&start=0&sid=b3af57495181ec63aeb9756c79d90a8a

[W DeMarco]

If you like spectrasonics you can probably get brand new cards for your pre's.  I have two 610's that I was goanna get serviced.  Low and behold Spectrasonics is still open for biz.  Their located in Ogden Utah.  Real friendly people.  I think they will even make brand new 610's and what not.

Will

[clintrubber]

Any news from the people who were building these from scratch ? Would be interesting to hear about the types of transistors & their influence.
I mean, the patent mentioned Ge-transistors but later info indicated all-Si.

Low and behold Spectrasonics is still open for biz.

Would be fun to be able to buy a few empty PCB-cards.

Regards,

  Peter

[FredForssell]

If you have a choice, I'd use the 110A.  The 101 card uses a single +24 vdc supply and the 110/110A use +/- 24 vdc.  You'll get a few dB more headroom out of the 110/110A.   Also the 101 and 110 have 600 ohm input impedance, and the 110A has 2.5k.

All of the above is from memory, so I could be wrong.  

Sonically, they should all be pretty similar, except for the differences caused by the different input impedance and the few extra dB of output capability.

Cheers,

[craigmorris74]

Does anybody have the contact info for Spectra Sonics?

Craig

[NewYorkDave]

Spectra Sonics
3750 Airport Rd
Ogden, UT 84405

(801) 392-7532

[craigmorris74]

Thanks, Dave

[electrochronic]

New phone # (801) 593 - 9813

ask for Bill or Derrick

[gar381]

http://www.waltzingbear.com/Schematics/SpectraSonics/Spectra110a1.pdf

GARY

[electrochronic]

Thanks for posting that gary , I was skulking around for that one.

[clintrubber]

Its amazing , I found the old button style transistors for this build and they have gold plated legs. some are even JAN military spec parts , completely unique compared to current supplies available.

Just curious, what will you be using ? The patent mentioned Ge-transistors but later info indicated all-Si.

[electrochronic]

I'll build  multiples with different combinations of components to compare sound , hearing is the best test.

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