Dared sl2000a Tube Preamp

george daniel

Hey-- put some pic's up guys,,I'll post some better ones in a few.

heiney9

I will George, I'm getting ready to leave for the day, but I'll get some up tomorrow for sure.

H9

Outfitter03

George I posted some pics in the Holy Grail Thread in Two Channel.

george daniel

thanks--I'll take a peek.

george daniel

I may have to re-think this,,Russian K-40 PIO caps

heiney9

As promised, some pics.







You can see the Auricaps, but I don't have the gold plated boards either. I remember asking the seller about that.

H9

heiney9

heiney9 wrote: »

George,

Here's a pic of the innards fo the SL2000A (left picture) the one on the left is 2005 model standard copper pcb's. The one on the right is the 2006 model with gold pcb abd silver shielded connecting wire. You can see the yellow Auricap coupling caps. The 2011 model is identical except I think they stopped shipping with Auricaps. You had asked about the value, I'm not sure, but as you can see they are easily accessible.



EDIT, easy to see, not sure how easy it is to get the pcb out

Sorry guys, this is NOT the photo of the SL2000A, it is in fact of the Dared VP-20 mono bloc amplifiers.

Got confused.

H9

Toolfan66

I wonder what the Auricaps would be like in my Dodd?? Might have to try it!! It has Sonicaps in it now..

You guys are killing me with the SL2000A..

george daniel

Thank you Brock--I'll report back soon,,old caps are out,, new ones goin' in,,I can say that it was not too bad,, I'm gonna start with the Russian K-40's,,then if I don't like em,,I can roll some caps,, as I wired it in such a way so I can do so,if that makes sense.I'll post some pics in a bit.

george daniel

Okay,, a few pic's,,I removed the stock caps and soldered wire to the PCB,,then mounted the caps(size does matter guys ) on the sides(inside) of the chassis,,so,, if I want to roll caps,I can,,the last two pic's are her warmin' up--seems good to go,so I'll hook her up and report back.The caps used are Russian K-40 military grade paper in oil,,IIRC the case is conductive,,wrap job performed by my wife(elec tape). I suppose I could have started a new thread eh?

Brock--you have the nicest pictures--a sincere thanks to you and Kieko for the tube links and suggestions.Got my Brimar ordered.Oh yeah,, gotta put the Sylvania's back in.

fishbones

Lookin good George!

george daniel

thank you sir--those big A$$ caps that I popped in it really seem to add a little more "shimmer" at first impression,,very smmoth,,already a great pre in stock form,,next up,,some tube rolling,,Brimar rectification.speaking of Brimar,,I had some awhile back,,the 12AU7 varients,,IIRC 13D5,,and they were spectacular,,I'll look around and see if they have any AT7 varients.

heiney9

Thanks George, it's just a point and shoot Canon and a steady hand. Here's a few of her up and running with the Bendix 6106 rectifier.

Brimar makes some 12AT7 Variants but they are outta sight in price.

Brimar 6060's with the Yellow "T" are the Holy grail of British tubes, the Red/Orange "T" are just a little bit less. They are as good as the famed and ultra pricey Genelax A2900 almost unobtainium.

heiney9

Brimar makes a 13D9 tube which is a 12AT7 variant.

H9

longhp

Dear All,

I have an old version (2005 I think). I'd like to do some modifications such as replace the stock cap with Auricap or other, stock 12AT7 with better tubes. Anything else will improve the sound?

Many thanks in advanced.

longhp

Many thanks for your advice, Keiko. I will try to replace the stock caps and stock Chinese tubes.

Ricardo

If it's and old version you probably have auricaps.

longhp

Hi Ricardo,

My version is Chinese version for Chinese or Asia market. Dared put 2 "cheap" Chinese caps rather Auricaps.

FTGV

Cute little pre!Goerge what did they use for the output coupling caps?You may want to look at upgrading those as well.

heiney9

Fred, in my Dared (2005 model), the (3) larger Black caps appear to be Nichicon, the smaller brown caps and smaller black cap are Sanwa brand. George has the schematic and he's going to send it to me so I'm not sure which of those are output coupling caps.

H9

FTGV

I don't have a schem. but I guestimate they are the larger yellow Carli film caps shown in your pic ,a paralleled pair per side.Georges pic show smaller blue ones.

george daniel

Fred-- schems e-mailed--Brock,,still waiting on you e-mail addy.Sorry for the delay guys,, some clown decided to ignore a stop sign and hit me while I was on the way home.

If I am understanding the schematics--the output coupling caps are 1uF x two each channel. (400 volt)

george daniel

reported--cikamoto

fishbones

Hope you're okay George?

heiney9

george daniel wrote: »

Fred-- schems e-mailed--Brock,,still waiting on you e-mail addy.Sorry for the delay guys,, some clown decided to ignore a stop sign and hit me while I was on the way home.

If I am understanding the schematics--the output coupling caps are 1uF x two each channel. (400 volt)

I hope you are alright George. I should have bought those Dared boards off Ebay. Then I could re-populate them and swap them out. I might contact the guy as see if he still has them.

I'm guessing you're correct Fred in mine it appears to be the square yellow Carli caps. Perhaps those are worth swapping for something more exotic.

George email me brock_h at comcast dot net

heiney9

I'm thinking some Obbligato Gold 1uF @ 630v. I'll have to check the dimensions.

or maybe a Clarity ESA 1uF @ 630v

H9

FTGV

george daniel wrote: »

Fred-- schems e-mailed--Brock,,still waiting on you e-mail addy.Sorry for the delay guys,, some clown decided to ignore a stop sign and hit me while I was on the way home.

Yikes hopefully your not banged up too badly George.Thanks for the schem.

If I am understanding the schematics--the output coupling caps are 1uF x two each channel. (400 volt)

Yep.Although strangely they are in series,not paralleled.

george daniel

yep-- I'm running out of real estate in there(the Dared),,I'll take a peek tonight,ideally,a small oil or poly cap would be nice,,or teflon,,,for me,,just getting to the spot on the board can be difficult,,as I was not able to completely remove it.

Thanks also guys--I'm fine--car is drivable-- damaged passenger door/quarter panel-- I came close to avoiding him.

heiney9

If they are in series couldn't one just double the value of a single cap and jumper the other position, giving a bit more room? My electronics memory is a little foggy on parallel vs series circuits at the moment.

H9

george daniel

H9-- did you get the schem I sent?