DCAudioDIY.com

DC Area Audio DIYer's Community
It is currently March 28th, 2024, 6:04 pm

All times are UTC - 5 hours [ DST ]




Post new topic Reply to topic  [ 5 posts ] 
Author Message
 Post subject: Is this gobbledygook
PostPosted: July 11th, 2021, 9:26 am 
Offline
User avatar

Joined: January 15th, 2015, 7:19 am
Posts: 1697
Location: Baltimore MD
I was a big fan of VanAlitine when I was in my short pants days of audio. Then much later maybe 10 years ago I bought one of his new SS amps with tube gain stage. I thought it was terrible and sent it back and was totally trashed by rhecAVA fan boys on AudioCircle for saying anything negative about the great g-d VanAlistine
Any way the following quote is from a PTA review of his latest and greatest
“….. Frank told me one reason the DVA M225 sounds so great is that through ear testing and measuring, extremely high-frequency oscillations waaay past the conventional audible limit were detected. These nasty oscillations were discovered to result from various parts in the circuit interacting with the ground plane and setting up resonances. AVA uses Zobel-like networks to ground at various spots in the circuit to “sponge” away the ultra-high frequency trash. This prevents interaction with gain stages that occur in the audible ran……”
What do you think?


Top
 Profile  
 
 Post subject: Re: Is this gobbledygook
PostPosted: July 11th, 2021, 9:33 am 
Offline
User avatar

Joined: February 19th, 2017, 9:43 am
Posts: 530
I think he had a circuit that wasn't stable and had to figure out how to make it more stable. But I'm no expert.

_________________
I have too much stuff - https://www.pleasebuymystuff.com


Top
 Profile  
 
 Post subject: Re: Is this gobbledygook
PostPosted: July 11th, 2021, 9:54 am 
Offline
User avatar

Joined: January 15th, 2015, 7:19 am
Posts: 1697
Location: Baltimore MD
Wouldn’t it just be easier to design a stable circuit


Top
 Profile  
 
 Post subject: Re: Is this gobbledygook
PostPosted: July 11th, 2021, 1:12 pm 
Offline

Joined: April 22nd, 2013, 12:58 pm
Posts: 285
Pelliott321 wrote:
Wouldn’t it just be easier to design a stable circuit


Shades of the PAT-5, which needed a big cap on the output to cut off the oscillations of a unity gain stage in the circuit.


Top
 Profile  
 
 Post subject: Re: Is this gobbledygook
PostPosted: July 11th, 2021, 2:58 pm 
Offline
User avatar

Joined: February 28th, 2013, 3:31 pm
Posts: 1780
May not be easier to design a proper circuit but definitely the only way to go. Crutches and band aids ultimately give poor results.

Tom


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 5 posts ] 

All times are UTC - 5 hours [ DST ]


Who is online

Users browsing this forum: No registered users and 51 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:  
cron
Powered by phpBB® Forum Software © phpBB Group