Mod your Beresford 7520

[leo]

If the cap fits under the board ok hopefully they have put via's on pin4 and pin8 so the cap is close as poss to the actual op-amp pins

If running the cap to the socket pins, the added track on the socket (also the track on those adaptor boards is thin) makes having the cap on the socket pins less effective

[Dougr33]

Did anyone get the original Tirna 4032 design to fit in the case?? Mine just arrived (shipped the day before they became aware) and they said 'return if doesn't fit'... I'm not clear if there's some differences in clearance in the 7520 due to how it's put together..

In other words.. should I take out my 4562s and try these, or just send them back? Thanks folks.

EDIT>> Nope, not even close. In fact, with all the hot glue on mine, moving the cap under the chip still wouldn't be low enough to close the case.
Oh well, I'll return and wait to see what's next!

[HighFidelityGuy]

Another update on the Tirna 4032 mod:

I received the new version of this today. The pins appear to be about 2mm shorter and the cap is now mounted underneath the board. so I think about 4-5mm of hight has been lost. Unfortunately the legs of the cap are bent round and soldered to the tops of the board legs, so they are quite a bit longer than they were before. I'll take some photos when I get them home tonight and I'll use a better camera this time.

[trailer]

I've had the LT1364's in for a week now.
They are rather good too. Not as wide a soundstage but it seems to be more of a front to back stage. (if that makes sense). Great detail. Only criticism is that with some recordings they sound a tad bright. I'd certainly recommend them as an option.

[Gazjam]

Another update on the Tirna 4032 mod:

I received the new version of this today. The pins appear to be about 2mm shorter and the cap is now mounted underneath the board. so I think about 4-5mm of hight has been lost. Unfortunately the legs of the cap are bent round and soldered to the tops of the board legs, so they are quite a bit longer than they were before. I'll take some photos when I get them home tonight and I'll use a better camera this time.

Good news, I await mine in the post.

Why would the longer Cap legs be a problem?

[HighFidelityGuy]

Good news, I await mine in the post.

Why would the longer Cap legs be a problem?

It means the cap is further away from the opamp and therefore less affective. I'll leave the explanation of why it's less affective and whether that's important to someone who understands electronics better than me.

[Gazjam]

It means the cap is further away from the opamp and therefore less affective. I'll leave the explanation of why it's less affective and whether that's important to someone who understands electronics better than me.

Tirna guy reckons the inductance of the repositioned cap wouldnt really be at audible frequencies..

no clue what that means, but he said its fixed the problem.
(which i can understand)

[Dougr33]

A few questions on this mod as I ponder sending the original (too tall) one back or soldering in place...

1. i haven't seen any comment/question on the effect of Stan's cap that's already on the board... aren't they now both in the circuit (though supposedly Stan's is too far away to have desired effect)?

2. If I decided to have this be my final opamp, and didn't believe in two different adapters in the path being optimum, might not Tirna's new board, without their cap, be close enough for Stan's cap to do it's duty if I removed Stan's opamp socket and soldered the Tirna straight to the board.
>>> Experts: do you think a little "audio perfection" is to be gained by directly soldering the newer Tirna board to the pc board, or is keeping Stan's socket in place just fine (especially if you guys aren't done finding the best opamp!)

3. What happened to some people complaining about a buzz or noise between songs (or something to that effect) with this mod?

Thanks folks!

[leo]

Guys , if the legs are too long its totally defeating the object of having this additional cap
Add the track length on the socket board + the now extra length of the cap legs to the actual SMD op-amp
Remember there is a ceramic cap on the main board going to these same pins, your only adding the additional cap to get it close as possible to the new smd one

[Dougr33]

Any chance Stan will "bless" a particular method for using the 4032s??