anyone got a schemo for this pre and or EQ

[Samuel Groner]

I have a schemo I traced for the output opamp.

Great! Would it be possible to see that?

The opamp is a very simple cascode with BJT's.

So a folded cascode? Or is the input stage cascoded? Or maybe the voltage gain stage?

Samuel

 

[pucho812]

[quote author="Crusty2"]Yes, it's a Lundahl. It's one of their low ratio ones.

I have a schemo I traced for the output opamp, but nothing for the input section. The opamp is a very simple cascode with BJT's. I suspect the input amp is nearly the same but maybe with some fets.

How much are they asking for these modules? They never did come out with a lunchbox version. Don't know why.[/quote]

Discontinued as far as I know... which is why DIy would be great on these

 

[Samuel Groner]

Thanks! Rather bohemian approach for an output amp, I must say... Need some more time to study it in detail.

Samuel

 

[pucho812]

thanks crusty got any other information?
:guinness: :guinness: :guinness:

 

[smallbutfine]

...this should be the same trannie as for the "V*T-737sp" D*irect Recording Path Tube channel...reads like this at Av*alon:
"Microphone: Transformer balanced 850/2500 ohm"
...for further investigation...

 

[smallbutfine]

...AD means A*valon D*esigns. The sp version is like the original 7*37 but the input trannie was changed "for more headroom" (A*valon). Possibly a XL version (LL1538XL of LL1578XL?)...

 

[pucho812]

Yeah Ad was obvious. But the rest is their own numbering system that is non other then a regular trafo just relabeled. Much is similar to the vipre custom input trafo which is none other then a cinimag.

Yeah the sear camp is a good suggestion. I'll be seeing him at AES so should be cool. will keep you guys posted...still waiting from a responce automated or not from availaon... as well I won't hold my breath...

 

[solder_city]

wrote to Availon...

from availaon...

try writing to avalon and you might have better luck :razz:

 

[pucho812]

solder like most people to keep the majors away and avoid lawsuits, etc, etc,etc we often use mispellings as opposed to the real thing. of course i spelled it correctly in the e-mail...

 

[Svart]

when all the information starts to come together about this, I'll be glad to layout an SMD and through-hole version...

I'm going to start on a SMD layout of the opamp-ish stage when i get a chance.

 

[pucho812]

badnews. message has not been delivered asavailon keeps shutting down the connetion says earthlink. will keep at it. By SMD layout you mean A pcb layout right?

 

[pucho812]

bumpo. availon dsoesn't take e-mail. i'll try and call them when I am in better health.

 

[pucho812]

Bump
Did we ever get any further on this?

 

[Bauman]

That file with a schematic is not available anymore, could some one pls send it to me ? :green:

THANKS!!
Fabio

 

[[silent:arts]]

oh - missed that too
my email is vm(at)silentarts(.)de
thank you :grin:

 

[pucho812]

drop me one too. :thumb: