low ESR caps on 4351


militaryoperator
 

Following on from recent posting about fitting LSR caps across the regulator filter caps on 4351 boards, I fitted two 1000uf across the two regulator o/ps. Seems to have helped I think?
Ben

Before                                                                                and after.
cap.jpg
  


Dave (G1OGY)
 

A useful outcome, Ben.
Surprised to see that much power in the skirts.

Is this `as well as` or `instead of``?

Dave, G1OGY


On Wed, 7 Apr 2021 at 11:55, militaryoperator via groups.io <Military1944=aol.com@groups.io> wrote:
Following on from recent posting about fitting LSR caps across the regulator filter caps on 4351 boards, I fitted two 1000uf across the two regulator o/ps. Seems to have helped I think?
Ben

Before                                                                                and after.
  


militaryoperator
 

Don't know Dave, I'm not well versed in the likes of phase noise and pll's etc. 
I just hear what the clever chaps say and try and give it a go. 

Don't even know what I'll use the boards for but thought it best to make the mods just in case, hi. 

Ben



Subject: Re: [UKMicrowaves] low ESR caps on 4351

A useful outcome, Ben.
Surprised to see that much power in the skirts.

Is this `as well as` or `instead of``?

Dave, G1OGY


On Wed, 7 Apr 2021 at 11:55, militaryoperator via groups.io <Military1944=aol.com@groups.io> wrote:
Following on from recent posting about fitting LSR caps across the regulator filter caps on 4351 boards, I fitted two 1000uf across the two regulator o/ps. Seems to have helped I think?
Ben

Before                                                                                and after.
cap.jpg
  
_._,_._,_


Dave (G1OGY)
 

Ben
Sorry to be obtuse...

I meant :
`as-well-as` "caps across the regulator filter caps" 
or 
`instead-of` "caps across the regulator filter caps" ?

Dave, G1OGY


On Wed, 7 Apr 2021 at 23:59, militaryoperator via groups.io <Military1944=aol.com@groups.io> wrote:
Don't know Dave, I'm not well versed in the likes of phase noise and pll's etc. 
I just hear what the clever chaps say and try and give it a go. 

Don't even know what I'll use the boards for but thought it best to make the mods just in case, hi. 

Ben



Subject: Re: [UKMicrowaves] low ESR caps on 4351

A useful outcome, Ben.
Surprised to see that much power in the skirts.

Is this `as well as` or `instead of``?

Dave, G1OGY


On Wed, 7 Apr 2021 at 11:55, militaryoperator via groups.io <Military1944=aol.com@groups.io> wrote:
Following on from recent posting about fitting LSR caps across the regulator filter caps on 4351 boards, I fitted two 1000uf across the two regulator o/ps. Seems to have helped I think?
Ben

Before                                                                                and after.
cap.jpg
  


militaryoperator
 

Ben
Sorry to be obtuse...

I meant :
`as-well-as` "caps across the regulator filter caps" 
or 
`instead-of` "caps across the regulator filter caps" ?

Dave, G1OGY



The boards I have, black type with little screen and 5 buttons to set things, has 10uf SMD fitted on both regs. I simply added these across them, so I guess "as well as", hi. 

Ben.G4BXD