Damping weight alternative

Doc B. · 3155

« previous next »
Pages: 1   Go Down

0 Members and 1 Guest are viewing this topic.

Offline Doc B.

  • Administrator
  • Hero Member
  • *****
    • Posts: 9641
    • Bottlehead
on: December 16, 2014, 06:56:09 AM
For what it's worth I gave the flask weights that an ebay seller from china is listing on ebay a shot. They are a little bigger in inside diameter and are thicker but fit the stock 300Bs just fine. The color is a bit more orange than the originals. Not sure if the thickness is more lead or just a thicker vinyl coating. The vinyl looks like ass, all drippy and lumpy. I was able to turn them to hide most of the bad stuff. What the heck, they look wierd anyway, right? I got them because I wanted to try two weights stacked on each tube. Does seem to reduce the sensitivity to switching a bit more.

Dan "Doc B." Schmalle
President For Life
Bottlehead Corp.

Offline fullheadofnothing

  • Global Moderator
  • Hero Member
  • *****
    • Posts: 1487
  • A noble spirit embiggens the smallest man
Reply #1 on: December 16, 2014, 07:04:43 AM
FWIW, the new weights are 15g heavier than the old ones. They are also 27% uglier.

Joshua Harris

I Write the Manuals That Make The Whole World Sing
Kit Packer Emeritus

Offline Doc B.

  • Administrator
  • Hero Member
  • *****
    • Posts: 9641
    • Bottlehead
Reply #2 on: December 16, 2014, 08:10:51 AM
Actually the right one is 33.6% uglier.

Dan "Doc B." Schmalle
President For Life
Bottlehead Corp.

Offline Natural Sound

  • Sr. Member
  • ****
    • Posts: 998
Reply #3 on: December 16, 2014, 08:33:08 AM
Any photos you could share?


Offline fullheadofnothing

  • Global Moderator
  • Hero Member
  • *****
    • Posts: 1487
  • A noble spirit embiggens the smallest man
Reply #4 on: December 16, 2014, 08:52:05 AM
Dan, my Uglometer just got back from calibration. I know what I measured!

Joshua Harris

I Write the Manuals That Make The Whole World Sing
Kit Packer Emeritus

Offline Doc B.

  • Administrator
  • Hero Member
  • *****
    • Posts: 9641
    • Bottlehead
Reply #5 on: December 16, 2014, 09:26:09 AM
If you didn't loan it to Peebs it wouldn't get driven off scale so much.

Dan "Doc B." Schmalle
President For Life
Bottlehead Corp.

Offline mcandmar

  • Hero Member
  • *****
    • Posts: 1599
  • Not all engineers are civil
Reply #6 on: December 16, 2014, 11:55:01 AM
Looks like your cooking a few sausages on there :)

(https://forum.bottlehead.com/proxy.php?request=http%3A%2F%2Fwww.charlesayoub.com%2Flife-style%2Fpublic%2Fuploads%2Fimages%2F13335461635142560.jpg&hash=f7d510bbbf05a67dd78b028bb7cc9601f5db7dc1)

M.McCandless

Offline johnsonad

  • Hero Member
  • *****
    • Posts: 1670
Reply #7 on: December 16, 2014, 12:18:05 PM
What diameter are you using?

Aaron Johnson

Offline HF9

  • Sr. Member
  • ****
    • Posts: 346
  • Zynsonix.com
    • Zynsonix.com
Reply #8 on: December 20, 2014, 04:57:40 PM
(https://forum.bottlehead.com/proxy.php?request=http%3A%2F%2Fwww.thisoldtoy.com%2Fnew-images%2Fimages-ok%2F600-699%2Ffp627-fpt20297.jpg&hash=6d30f87bb3f1b5b206b8fb1b7230bea88a922eae)

My DIY Audio Electronics Blog: DIYAudioBlog.com

Offline Doc B.

  • Administrator
  • Hero Member
  • *****
    • Posts: 9641
    • Bottlehead
Reply #9 on: December 20, 2014, 05:29:20 PM
(https://forum.bottlehead.com/proxy.php?request=http%3A%2F%2Fwww.americansale.com%2Fimages%2Fproducts%2Fmedium%2F204767.jpg&hash=f57a232d9dcf2ad8f6df9670600aacf6eb7840c0)

Dan "Doc B." Schmalle
President For Life
Bottlehead Corp.

Offline johnsonad

  • Hero Member
  • *****
    • Posts: 1670
Reply #10 on: December 20, 2014, 05:50:04 PM
Diameter anyone?:)

Aaron Johnson

Offline Gerry E.

  • Full Member
  • ***
    • Posts: 192
Reply #11 on: December 21, 2014, 02:43:56 AM
Quote from: johnsonad on December 20, 2014, 05:50:04 PM
Diameter anyone?:)


Hi Aaron:

I purchased these:

http://www.amazon.com/Bel-Art-Scienceware-183070005-Round-Coating/dp/B0013J1UOC

Inner diameter of 43mm = 1.69 inches = slightly greater than 1 5/8 inches.

Question for you - in the Paramount Parts Swap thread you mentioned using a 1.5uF cathode bypass cap to roll off the Paramount at around 80hz.  Boulos was wondering if that was too low.  Is there a calculation for this?  Thanks!

Gerry


Offline johnsonad

  • Hero Member
  • *****
    • Posts: 1670
Reply #12 on: December 21, 2014, 04:36:08 AM
Thank you for the size :)

You miss read it Gerry. My sub woofers have a built in high pass filter. The signal chain is preamp to the subs (with HPF) then to power amp and speakers. Those frequencies are filtered before the get to the power amp. The 1.5uF size is what I have sitting around. There is a calculation for it but I don't know it.
« Last Edit: December 21, 2014, 04:46:58 AM by johnsonad »

Aaron Johnson

Offline 2wo

  • Hero Member
  • *****
    • Posts: 1260
  • Test
Reply #13 on: December 22, 2014, 01:13:53 PM
You can buy strips of wheel weight material at auto parts stores. They are pretty bendy and have foam tape on one side. You would not want to stick it direct to a tube though. I am not sure how much heat the tape is good for. I have used it to add mass to a match rifle barrel, which get pretty hot but even if heat wasn't a problem, it sticks so well you may not be able to get it off. Maybe cover it with some Teflon plumber tape...John   

John S.

Pages: 1   Go Up
« previous next »