News: S.E.X. 3.0 now shipping
March 26, 2017, 01:09:42 am

Author Topic: end bells on plate chokes  (Read 304 times)

0 Members and 1 Guest are viewing this topic.

Offline Jeroen

  • Jr. Member
  • **
  • Posts: 41
    • View Profile
end bells on plate chokes
« on: March 19, 2017, 02:33:10 am »
Just ordered the Kaiju amp, i'm looking forward to build it. Feeling like a 10 year old kit with a new Lego project.

I would like to put end bells on the chokes. Does someone know where I could get these? What size do the chokes have?


Regards,

Jeroen


Offline Caucasian Blackplate

  • Global Moderator
  • Hero Member
  • *****
  • Posts: 7831
    • View Profile
Re: end bells on plate chokes
« Reply #1 on: March 19, 2017, 08:44:34 am »
You would have to restack the laminations in the choke with the covers first inserted into the channel frames.  This is, of course, assuming that you can pull the choke apart without damaging anything in the process (the chokes are varnished together).

-PB
Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man

Offline fullheadofnothing

  • Global Moderator
  • Hero Member
  • *****
  • Posts: 1119
  • A noble spirit embiggens the smallest man
    • View Profile
Re: end bells on plate chokes
« Reply #2 on: March 19, 2017, 09:22:04 am »
Also worth pointing out that the limited edition Kaijus have end bells on the chokes...
Joshua Harris

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

Offline Jeroen

  • Jr. Member
  • **
  • Posts: 41
    • View Profile
Re: end bells on plate chokes
« Reply #3 on: March 19, 2017, 08:09:28 pm »
Taking a look at the photo of the choke transformer it seems I can take of the metal U shaped frame and leave the laminations in place. Could you give me the outside dimensions of the choke transformer?

Thanks in advance,

Jeroen

Offline Doc B.

  • Administrator
  • Hero Member
  • *****
  • Posts: 6605
    • View Profile
    • Bottlehead
Re: end bells on plate chokes
« Reply #4 on: March 20, 2017, 05:25:39 am »
Though it may not seem like it at first read, PB was trying to suggest that this is not going to work. The channel frame is going to be very difficult to remove because of the vacuum impregnated varnish, and there would very likely be damage to the laminations from trying to do so. The lams are air gapped and the rather critical spacing of that air gap could be disturbed in the process (i.e. the stack of i's might fall off of rest of the core). As Josh mentions, we had a small run of chokes made with bell ends inside the channel frames just for the limited edition Kaijus. Those lam stacks have been made to accomodate the thickness of the bell ends, and thus they are a little different. There is not a reasonable way to safely take a stock Kaiju choke channel frame off and add bell ends, and we definitely cannot support doing so.
Dan "Doc B." Schmalle
President For Life
Bottlehead Corp.

Offline braubeat

  • Full Member
  • ***
  • Posts: 97
    • View Profile
Re: end bells on plate chokes
« Reply #5 on: March 20, 2017, 05:58:14 am »
you can buy a cover to put over the entire transformer, but you must take into consideration the extra heat buildup if the units run hot

Michael

Offline Jeroen

  • Jr. Member
  • **
  • Posts: 41
    • View Profile
Re: end bells on plate chokes
« Reply #6 on: March 21, 2017, 08:27:55 pm »
Thanks for the advice, I will leave the channel frame on it's place.

What about attach end bells with some glue to the channel frame? That won't hurd I guess..

What size end bells do I need?


Regards Jeroen



Offline Paul Joppa

  • Global Moderator
  • Hero Member
  • *****
  • Posts: 4465
    • View Profile
Re: end bells on plate chokes
« Reply #7 on: March 22, 2017, 02:58:07 pm »
The Kaiju plate choke and output transformer core laminations are 2.5" high and 3.0" wide, so that will be the available end bell size. The channel frame is a bit larger since it fits around the lams. So, there will be a small stair-step around the edges. I don't know whether it's possible or not to trim the end bell edges to just fit within the channel frame edges.

Note that some end bells fold over the core a bit; obviously those will NOT fit - check the specs carefully!
Paul Joppa