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Analog Squared Paper Discussion Thread. - Page 89

post #1321 of 3712

regarding the tube rings - maybe i will make shorter ones, more similar to real rings, just for comparison and to learn something. as summary the tube rings correct one weakness at the cost of another weakness, so not that attractive, at least for this amp and the tube types used for it.

 

i by a far margin prefer tube rolling and finding the best tube combo for a specific sound, i have the feeling that tube rings here alwyas will be only a compromise.

 

my dream combo sounds better without tube rings (but i have to find another way to get this great bass quality enhancement, in this area the tube rings are doing a great job).


Edited by GermanGuy - 7/28/13 at 12:10pm
post #1322 of 3712
Honestly, as crazy as it sounds try to find a small slab of marble Approximately 11cm x 3cm x 5cm (L.W.D) and place it halfway across the amp top. I have no idea why this works but it does! Add's a little bass but also increases the openness!

Mine is scruffy looking as it is an off cut from a kitchen counter top but it does the job!

post #1323 of 3712

interesting comparison of tube rings here:

 

http://herbiesaudiolab.net/compare.htm

post #1324 of 3712

marble and aluminium (as other strong materials like granite or stone) have resonances and vibration modes in the 1 to about 10 KHz range, so the marble maybe absorbs some of the resonances of the aluminium, also the cradle - amp - marble construction works as damper for movement caused by external movement or vibrations.

post #1325 of 3712
See, that is why your such a valuable member here GG, that now makes sense!
post #1326 of 3712

here are some nice pictures i found illustrating this. they show the amplitude of the resonances of the housing of a grundig amplifier:

 

resonance amplitudes of the housing placed on

 

bad / weak underground without base:

 

 

good / strong underground without base:

 

 

bad / weak underground, with base (hopefully like my cradle i will make):

 

 

good / strong underground, with base:

 

 

maybe this also illustrates why i will wait and make a base / cradle with the construction details as posted some time ago.


Edited by GermanGuy - 7/28/13 at 1:08pm
post #1327 of 3712

ianmedium,

 

Is that marble or a rather large piece of Kendal Mint Cake?!? 

 

Cheers,

Andy

 

Quote:
Originally Posted by ianmedium View Post

Honestly, as crazy as it sounds try to find a small slab of marble Approximately 11cm x 3cm x 5cm (L.W.D) and place it halfway across the amp top. I have no idea why this works but it does! Add's a little bass but also increases the openness!

Mine is scruffy looking as it is an off cut from a kitchen counter top but it does the job!

post #1328 of 3712

maybe a piece of Alaska pollock waiting for lunch time?

post #1329 of 3712
Kendall mint cake, sheesh Andy, your bringing back memories, never could stand that suff!

GG, those graphs make sense, so I will continue to use the mint cake on my amp!

I am now going to turn my attention the base where I put my 801. I have a lump of cork covered wood which it rests on when I use my amp with it. I think I am going to try the wood cones underneath it and see what happens!

Oh Andy, I never heard back from multiple emails sent about that cable so I have given up on them!
post #1330 of 3712
This thread is fantastic.
post #1331 of 3712

+1

Kudos to you guys... beerchug.gif

post #1332 of 3712
Quote:
Originally Posted by AnakChan View Post

Nice find on the video. They actually caught me whizzing by right to left 19-22 sec into the video with my camera around my neck :p.

 

Ahaa.. That's the way you created a great coverage on the event. Congratz... beerchug.gif

post #1333 of 3712

ianmedium,

 

Kendal mint cake is definitely an acquired taste, a bit like Marmite! 

 

No worries about the cable as the Epiphany one is very flexible and probably `sounds' as good. Do try to mail that Dire Straits SD card if you get a minute, as it'd be nice to revive a few musical memories.

 

Cheers,

Andy.

 

Quote:
Originally Posted by ianmedium View Post

Kendall mint cake, sheesh Andy, your bringing back memories, never could stand that suff!

GG, those graphs make sense, so I will continue to use the mint cake on my amp!

I am now going to turn my attention the base where I put my 801. I have a lump of cork covered wood which it rests on when I use my amp with it. I think I am going to try the wood cones underneath it and see what happens!

Oh Andy, I never heard back from multiple emails sent about that cable so I have given up on them!
post #1334 of 3712

new 10" copper cable coming... Made for me by Casque-headphone

 

post #1335 of 3712
So gold is now officially an option!

This just posted on ASP's FB page!

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