Mods for SCA-35?

Lissnils · 1 Mods for SCA-35? on Sat May 16, 2009 12:17 pm

Lissnils

Posts: 5
Join date: 2008-12-15
Location: Stockholm, Sweden

Hello!
Just got a Dynaco SCA-35 from a friend. Started it up and it works and sounds ok. Have made some researching on the net for mods on this model. Is there anyone who has some experience on mods on the SCA-35 and what are recommended?

I have a Pas3 with Mr Bob Latino's ST-70 and are very satisfied with that. I'll keep the Pas original and thought I could fool around a bit with the SCA-35.

Please tell me if you have any thoughts in this matter.

Regards / Jan

GP49 · 2 Re: Mods for SCA-35? on Sat May 16, 2009 3:30 pm

GP49

Posts: 66
Join date: 2009-04-30

Some have suggested (a) eliminating the tone controls and their associated integrated modules, and (b) replacing the original 7199 pentode/triode input driver/splitter with the 12DW7 twin triode circuit as executed in the Stereo 35 power amplifier.

Tube Nube · 3 Re: Mods for SCA-35? on Mon May 18, 2009 7:55 pm

Tube Nube

Posts: 66
Join date: 2008-12-07
Age: 46
Location: Calgary, AB

Bob has a sticky-post above,

but here's the link:
http://dynacotubeaudio.forumotion.com/basket-f2/rebuild-your-dynaco-st-35-power-amp-photos-t70.htm

He goes into some detail about this very subject.

Brenton

Lissnils · 4 Re: Mods for SCA-35? on Tue May 19, 2009 3:22 am

Lissnils

Posts: 5
Join date: 2008-12-15
Location: Stockholm, Sweden

Thank you for your inputs. I will check this out.

Thanks / Jan

Bob Latino · 5 Re: Mods for SCA-35? on Tue May 19, 2009 5:23 am

Bob Latino

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Location: Massachusetts

Tube Nube wrote:Bob has a sticky-post above,

but here's the link:
http://dynacotubeaudio.forumotion.com/basket-f2/rebuild-your-dynaco-st-35-power-amp-photos-t70.htm

He goes into some detail about this very subject.

Brenton

Jan,

That link that Brenton mentions is for the ST-35 power amp and you are asking about the SCA-35 integrated amp. Roger Stevens has a web page at the the link below on mods for the SCA-35 integrated amp.

Roger Stevens SCA-35 mods

Bob

Lissnils · 6 Re: Mods for SCA-35? on Wed May 20, 2009 4:36 am

Lissnils

Posts: 5
Join date: 2008-12-15
Location: Stockholm, Sweden

Thank You Bob!
It seems like I should start with the power supply. According to
http://www.curcioaudio.com/sca35_3.htm
this will give "Significant Improvement in in Dynamic Range and Resolution of Both Midrange and High Frequencies
Dramatic Improvement in Depth and Tightness of Bass Performance
Dramatic Improvement in System Reliability & Stability"
and then the tone controll bybass switch. Ok now I know what to do with my spare time... hmmm I also have a SP-6 to build.
So little time, so many "women"....

Jan

Bob Latino · 7 Re: Mods for SCA-35? on Wed May 20, 2009 6:50 am

Bob Latino

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Join date: 2008-11-27
Location: Massachusetts

Lissnils wrote:Thank You Bob!
It seems like I should start with the power supply. According to
http://www.curcioaudio.com/sca35_3.htm
this will give "Significant Improvement in in Dynamic Range and Resolution of Both Midrange and High Frequencies
Dramatic Improvement in Depth and Tightness of Bass Performance
Dramatic Improvement in System Reliability & Stability"
and then the tone controll bybass switch. Ok now I know what to do with my spare time... hmmm I also have a SP-6 to build.
So little time, so many "women"....

Jan

Jan,

I am sure that Curcio's power supply for the SCA-35 would improve the sound of any Dynaco SCA-35 integrated amp. My only criticism of Curcio's board (and this extends to virtually all of his boards, parts sets etc.) is that they seem to be priced (IMHO) a lot higher than they should be. He asks $65 for the board and $155(!) for the board and parts set. I checked the parts list and come up with about $30-$35 worth of parts and he asks $90 for the parts set? The most expensive parts are C1, C2, C3 and C4 at about $4 each. He wants $65 for a 2 1/2 inch by 6 inch board (about 15 square inches) and this seems high also. As a comparison, the VTA driver board for the ST-70 is 3 1/2 inches by 7 3/8 inches (about 26 square inches), retails for $35 and includes free shipping. Curcio has a $10 minimum shipping fee so your $65 board will cost you $75 shipped.

Just to be clear - I have no issue with the quality of the products that Joe Curcio sells or their design - just the pricing ..

Bob

Lissnils · 8 Re: Mods for SCA-35? on Wed May 20, 2009 9:18 am

Lissnils

Posts: 5
Join date: 2008-12-15
Location: Stockholm, Sweden

Bob,
I know... I'll build it from scratch... but this seams to be the same thing, cheaper though
http://store.triodestore.com/sdssca35brdprts.html
Thank you / Jan

Solder Slinger · 9 R.E. Mods for SCA-35 on Sun May 24, 2009 8:36 pm

Solder Slinger

Posts: 2
Join date: 2009-05-24

Another source for a power board is Audio Regenesis, they have a replacement SCA-35 board for under $40 with detailed instructions. See www.audioregenesis.com for more info.

Lissnils · 10 Re: Mods for SCA-35? on Mon May 25, 2009 10:08 am

Lissnils

Posts: 5
Join date: 2008-12-15
Location: Stockholm, Sweden

Thank you / That site was new for me.

Jan

1 Mods for SCA-35? on Sat May 16, 2009 12:17 pm

2 Re: Mods for SCA-35? on Sat May 16, 2009 3:30 pm

3 Re: Mods for SCA-35? on Mon May 18, 2009 7:55 pm

4 Re: Mods for SCA-35? on Tue May 19, 2009 3:22 am

5 Re: Mods for SCA-35? on Tue May 19, 2009 5:23 am

6 Re: Mods for SCA-35? on Wed May 20, 2009 4:36 am

7 Re: Mods for SCA-35? on Wed May 20, 2009 6:50 am

8 Re: Mods for SCA-35? on Wed May 20, 2009 9:18 am

9 R.E. Mods for SCA-35 on Sun May 24, 2009 8:36 pm

10 Re: Mods for SCA-35? on Mon May 25, 2009 10:08 am