Upgrading Dynaco ST-400

boostin1989 · 4th October 2007, 02:10 AM

I have a Dynaco ST-400 that seems to be all original. I would like to go through and upgrade it with some newer components. I plan on replacing some of the capacitors, certain resistors and bypass the Dynaguard. I'm not an electronics "expert" but I can get by. What else should I do while I have the amp apart? Anyone have any info any problem areas that should be addressed with this amp?

audiobard · 14th February 2008, 07:55 PM

Hello,

There is an article in TAA (The Audio Amateur) 3/83 by Bill Rollins about an update of the stereo 400. I have a copy on paper, but not yet in electronic form.I'll try to scan it as soon as I can and mail it to you if you are interested.
All best

d3imlay · 16th February 2008, 05:05 PM

If this was a kit built unit, the build quality is suspect. Look for poor/improper connections and bad solder joints.

gunsoftexas · 16th February 2008, 07:24 PM

This could help you

bigyank · 19th May 2010, 04:46 PM

Quote:

Originally Posted by audiobard

Hello,

There is an article in TAA (The Audio Amateur) 3/83 by Bill Rollins about an update of the stereo 400. I have a copy on paper, but not yet in electronic form.I'll try to scan it as soon as I can and mail it to you if you are interested.
All best

I am getting ready to dive into a ST-400 rebuild and wondered if this article you reference was ever scanned in?

Yank

audiobard · 20th May 2010, 06:36 AM

Hi bigyank,boostin1989
Pls send me your e-mail.

bigyank · 20th May 2010, 11:54 AM

I just did thanks for getting back to me.

Yank

lowpoke · 20th May 2010, 12:44 PM

Or if you really want to change it up some, you can give it a $1300 Van Alstine makeover.

audiobard · 20th May 2010, 12:55 PM

Bigyank check your inbox

)

bigyank · 20th May 2010, 01:13 PM

Got it thanks. I am definitely aware of Frank's work and the Insight amp. My issue is that my amp has the meter option and I would miss them.

Yank

4th October 2007, 02:10 AM	#1
boostin1989 diyAudio Member Join Date: Jan 2006 Location: Mentor, Ohio	Upgrading Dynaco ST-400 I have a Dynaco ST-400 that seems to be all original. I would like to go through and upgrade it with some newer components. I plan on replacing some of the capacitors, certain resistors and bypass the Dynaguard. I'm not an electronics "expert" but I can get by. What else should I do while I have the amp apart? Anyone have any info any problem areas that should be addressed with this amp?

14th February 2008, 07:55 PM	#2
audiobard diyAudio Member Join Date: Jun 2004 Location: Beograd	dynaco update Hello, There is an article in TAA (The Audio Amateur) 3/83 by Bill Rollins about an update of the stereo 400. I have a copy on paper, but not yet in electronic form.I'll try to scan it as soon as I can and mail it to you if you are interested. All best

16th February 2008, 07:24 PM	#4
gunsoftexas diyAudio Member Join Date: Jan 2008	More juice This could help you

20th May 2010, 12:44 PM	#8
lowpoke diyAudio Member Join Date: Mar 2009 Location: Australia	Or if you really want to change it up some, you can give it a $1300 Van Alstine makeover. __________________ Show us what ya got at Homebuilt Hi-fi

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16th February 2008, 05:05 PM	#3
d3imlay diyAudio Member Join Date: Sep 2004 Location: Ohio	If this was a kit built unit, the build quality is suspect. Look for poor/improper connections and bad solder joints.

20th May 2010, 06:36 AM	#6
audiobard diyAudio Member Join Date: Jun 2004 Location: Beograd	Hi bigyank,boostin1989 Pls send me your e-mail.

20th May 2010, 11:54 AM	#7
bigyank diyAudio Member Join Date: Jul 2004 Location: Phila, PA	I just did thanks for getting back to me. Yank

20th May 2010, 12:55 PM	#9
audiobard diyAudio Member Join Date: Jun 2004 Location: Beograd	Bigyank check your inbox )

20th May 2010, 01:13 PM	#10
bigyank diyAudio Member Join Date: Jul 2004 Location: Phila, PA	Got it thanks. I am definitely aware of Frank's work and the Insight amp. My issue is that my amp has the meter option and I would miss them. Yank

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