DCAudioDIY.com

DC Area Audio DIYer's Community
It is currently October 31st, 2024, 8:32 pm

View unanswered posts | View active topics


Board index » DCAudioDIY Main » General Discussion

All times are UTC - 5 hours [ DST ]



Post new topic Reply to topic  Page 8 of 8
  [ 76 posts ]  Go to page Previous  1 ... 4, 5, 6, 7, 8
  Print view Previous topic | Next topic 
Author Message
Cogito
PostPosted: May 15th, 2024, 10:31 pm 
Offline

Joined: July 17th, 2016, 6:24 am
Posts: 1126
David McGown wrote:
I really like the CDE caps, best is use the versions with voltage ratings 1000V and above. Use these first, then consider upgrading in your DIY builds. You may not need to.

Shashi, I am a little concerned about the version of the Miflex caps you are using, I believe these are for speaker crossover application. For tube applications I would use the 600V version. The thicker and higher voltage films generally are better for tube circuits. There is a big size difference.

David


Thx David. I intended to get the 600V version caps but placed the 250V caps in the cart mistake. They are shipped back for exchange.

BTW, I am leaning towards Deuland CAST-PIO-Ag BYPASS Series caps for bypassing the Jupiters. They are expensive, but what the heck, these are life-time purchases like Walt said.


Last edited by Cogito on May 16th, 2024, 9:34 am, edited 1 time in total.

Top
 Profile  
 
Cogito
PostPosted: May 15th, 2024, 10:51 pm 
Offline

Joined: July 17th, 2016, 6:24 am
Posts: 1126
Stuart Polansky wrote:

Question Sashi: what is the input impedance of the load? Are you sure that the 1uF caps are sufficient to give you full bass response?


Load is 75k Ohms, no issues with the bass.

Quote:
Don't forget the power supply caps. They are a part of the circuit and need to be bypassed. I don't know what your circuit is, but if you can replace the B+ caps (assuming they are electrolytic) with DC Link caps, you'll be pleasantly surprised at the improvement. Again, bypass the final stage of the filter with a small value (say, 0.1uF) Miflex or better.

Stuart


So, you are telling me I need to spend more on the caps? :-D
Fortunately, there are no smoothing caps after the tube rectifier. It not a standard power supply we see in tube amps and preamps, but as a result, the preamp is very quiet, and the details come thru.
Top
 Profile  
 
dberning
PostPosted: May 17th, 2024, 11:01 am 
Offline

Joined: March 2nd, 2013, 2:43 pm
Posts: 223
Location: Potomac, MD
Speaking of caps, I have a 25uF, 2kV oil cap I would like to give away. Might be the cat's meow as a bypass for a much larger energy storage for a tube amp.

D
Top
 Profile  
 
Cogito
PostPosted: May 17th, 2024, 1:02 pm 
Offline

Joined: July 17th, 2016, 6:24 am
Posts: 1126
Would they be good to bypass 470uF Caps. I have 2 of those in CLC filter.
Top
 Profile  
 
David McGown
PostPosted: May 17th, 2024, 1:25 pm 
Offline

Joined: February 28th, 2013, 1:19 pm
Posts: 938
Shashi,

They are probably bigger than your preamp.

25uF 2kV caps PIO are BIG.

David
Top
 Profile  
 
Cogito
PostPosted: May 20th, 2024, 10:51 am 
Offline

Joined: July 17th, 2016, 6:24 am
Posts: 1126
I didnt observer the 2kV part.
Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  Page 8 of 8
  [ 76 posts ]  Go to page Previous  1 ... 4, 5, 6, 7, 8

Board index » DCAudioDIY Main » General Discussion

All times are UTC - 5 hours [ DST ]

Who is online

Users browsing this forum: No registered users and 9 guests

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
Switch to mobile style
Powered by phpBB® Forum Software © phpBB Group