Author Topic: Low Thermal E.M.F. Binding Post TBP3  (Read 12695 times)

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Offline DavidKo

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Re: Low Thermal E.M.F. Binding Post TBP3
« Reply #25 on: January 25, 2023, 08:26:34 pm »
Maybe you can mention the possibility of accessories ordering in the first post. I have been ordering it without checking the end of the datasheet and even then I was not sure if it is the option or only remark in datasheet. It will be good to add/correct nut in accessories, I do not see any use of #8-32 nut (except for Pomona posts)  ^-^. Maybe the washers can be added.

Few pictures below.
When I compare them to Pomona 3770 (difference in color is given by fact that Pomona is gold plated and mine TBP3 is without any surface treatment):
  • Both have very good finish
  • TBP3 have post and captive thumb nut from CuTe, Pomona only post - based on datasheet
  • Nuts are from copper, Pomona have nickel plated brass
  • Only one piece of washer and nut in Pomona set
  • Pomona uses #8-32 nut (poor quality), TBP3 is metric (checked)
  • TBP3 can be used in thin panels - without D-insert or smaller hole, when the panel is thinner than cca 0.34mm based on my measurement
  • Pomona secure the post in the hole only in small depth and requires minimum thickness of the panel (or file the mounting base)
  • TBP3 have better counter rotation fixation (with remark below) and is completely insulated in the hole - nothing like burr cannot get in touch with the metal part of the post
  • I forgot to mention that Pomona should be gold directly on CuTe, TBP3 should use Ni/Au - I chose the one without plating

My personal conclusion is that TBP3 are better quality and more robust. The hole in the color ring of the captive nut is big enough for all bananas that I have at home and they go freely through.

Edit: Alternative fixation proposal in the post.
« Last Edit: January 26, 2023, 07:21:00 pm by DavidKo »
 
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Offline branadicTopic starter

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Re: Low Thermal E.M.F. Binding Post TBP3
« Reply #26 on: January 26, 2023, 05:43:14 pm »
First of all, please place your questions here, so I only have to answer once and not individually, thanks.

The spade lugs are only available in bare copper.
No, there is no brass version of the binding posts available.
Yes, the threat on the binding post is metric (M4), not imperial.

Please find the price per unit for the asseccories below:

Spade lug 12-14 T2 Copper   $1,00
Spade lug 22-16 T2 Copper   $0,60
O ring tongue 16-22 T2 Copper   $0,60
#8-32 T2 Copper Hex Nuts   $1,00

DavidKo
The posts are as they are, I haven't designed them, I just help with the EU group buy. What I can comment: In some cases you don't need the light guide, but need the space due to front panel thickness, this is why you have both D-shaped tubes in the set.

-branadic-
« Last Edit: January 26, 2023, 07:28:01 pm by branadic »
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Offline DavidKo

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Re: Low Thermal E.M.F. Binding Post TBP3
« Reply #27 on: January 26, 2023, 07:19:08 pm »
Sorry for confusion, my idea was to propose alternative fixing concept to the one in datasheet. My proposal use smaller hole with the spacer as fixation part. I have made a sketch for that use case, but I'm not sure with the dimensions of the hole. I hope that the alternative fixation concept is understandable from the picture - the spacer is in blue. 
When I read it again I think that the text is too many words to the idea which I want to say (I have modified it).
« Last Edit: January 26, 2023, 07:21:34 pm by DavidKo »
 

Offline branadicTopic starter

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Re: Low Thermal E.M.F. Binding Post TBP3
« Reply #28 on: January 26, 2023, 07:27:47 pm »
I got you, however I don't see the benefit. As I already mentioned, the posts are designed to be used with or without light guide, hence both D-shaped tubes in the set. Both use the very same size D-shaped hole. If you want to mount the posts differently feel free.

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Offline branadicTopic starter

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Re: Low Thermal E.M.F. Binding Post TBP3
« Reply #29 on: January 31, 2023, 06:43:37 am »
Remainder

Only a few hours left before the window for the group order closes.

-branadic-
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Offline ddrl46

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Re: Low Thermal E.M.F. Binding Post TBP3
« Reply #30 on: January 31, 2023, 07:53:59 am »
Remainder

Only a few hours left before the window for the group order closes.

-branadic-

I sent a PM to join the group order a while ago, I didn’t get a confirmation yet so I wonder if you got it?
 

Offline DH7DN

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Re: Low Thermal E.M.F. Binding Post TBP3
« Reply #31 on: January 31, 2023, 08:50:32 am »
Remainder

Only a few hours left before the window for the group order closes.

-branadic-

I sent a PM to join the group order a while ago, I didn’t get a confirmation yet so I wonder if you got it?

Same here, no confirmation yet...
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Online Ole

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Re: Low Thermal E.M.F. Binding Post TBP3
« Reply #32 on: January 31, 2023, 09:30:33 am »
Hopefully my order came in in time
« Last Edit: February 01, 2023, 07:13:36 am by Ole »
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Offline branadicTopic starter

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Re: Low Thermal E.M.F. Binding Post TBP3
« Reply #33 on: January 31, 2023, 06:34:37 pm »
I do understand the need to feel like a customer, everyone individually being treated and contacted be me, but I'm employed and organize that group order in my spare time. If you have sent a PM, as I asked for in the first post, be certain that your message arrived and that you are on the list.

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Offline branadicTopic starter

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Re: Low Thermal E.M.F. Binding Post TBP3
« Reply #34 on: February 01, 2023, 08:11:08 am »
The group order is now closed and the group order was placed. I get back to you once I know more.

-branadic-
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Offline Ismsanmar

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Re: Low Thermal E.M.F. Binding Post TBP3
« Reply #35 on: February 05, 2023, 01:03:59 pm »
F

Looks like I'm 5 days late. If another group buy occurs, keep me in mind, although from what I have read it seems that there are few possibilities.
 

Offline sahko123

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Re: Low Thermal E.M.F. Binding Post TBP3
« Reply #36 on: February 05, 2023, 05:08:38 pm »
Is it likely these posts will eventually make there way onto taobao or aliexpress? Seeing how there is already the TBP2 on taobao
Asking for a friend
 

Offline branadicTopic starter

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Re: Low Thermal E.M.F. Binding Post TBP3
« Reply #37 on: February 05, 2023, 08:00:56 pm »
If you refer to these posts I didn't knew them before. I simply don't know if the TBP3 will show up elsewhere.

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Offline branadicTopic starter

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Re: Low Thermal E.M.F. Binding Post TBP3
« Reply #38 on: February 11, 2023, 10:02:23 am »
Quick update:
The package is on its way to me and should arrive soon.

-branadic-
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Offline branadicTopic starter

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Re: Low Thermal E.M.F. Binding Post TBP3
« Reply #39 on: February 12, 2023, 01:16:04 pm »
I'm happy to share the 3D-CAD file of the binding posts today.

-branadic-
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Offline branadicTopic starter

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Re: Low Thermal E.M.F. Binding Post TBP3
« Reply #40 on: February 16, 2023, 05:54:55 pm »
The package with the binding posts arrived today. It will take me some time to sort it all up and contact you, but I'm in the process ;)
Stay tuned and watch your mail account.

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Offline branadicTopic starter

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Re: Low Thermal E.M.F. Binding Post TBP3
« Reply #41 on: February 22, 2023, 10:30:25 am »
First packages were sent yesterday and some of them should already arrive today.

-branadic-
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Offline Echo88

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Re: Low Thermal E.M.F. Binding Post TBP3
« Reply #42 on: February 22, 2023, 05:09:25 pm »
I got mine today, they are beautiful  :)
 

Offline mendip_discovery

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Re: Low Thermal E.M.F. Binding Post TBP3
« Reply #43 on: February 22, 2023, 08:02:52 pm »
I got mine today, they are beautiful  :)

I got some in the first batch and I agree they are rather pretty. Thanks to Branadic for doing the cat hoarding.

I have some pictures of the spade and ring connectors if anyone is interested.
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Offline balun

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Re: Low Thermal E.M.F. Binding Post TBP3
« Reply #44 on: February 22, 2023, 10:13:14 pm »
Damn, missed group order again :-(
 

Offline DH7DN

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Re: Low Thermal E.M.F. Binding Post TBP3
« Reply #45 on: February 23, 2023, 07:42:23 pm »
Thanks @branadic, I'm really satisfied with the binding posts. Will be a nice metrology project  :-+

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Offline alex-sh

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Re: Low Thermal E.M.F. Binding Post TBP3
« Reply #46 on: February 23, 2023, 10:11:37 pm »
I have missed it .... again
@branadic - when is another group buy?
 
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Offline sahko123

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Re: Low Thermal E.M.F. Binding Post TBP3
« Reply #47 on: February 23, 2023, 10:57:47 pm »
wow looks like the plastic moulding is even cleaner then i expected cant wait to receive mine
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Online Ole

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Re: Low Thermal E.M.F. Binding Post TBP3
« Reply #48 on: February 24, 2023, 06:26:00 am »
My Package came in yesterday aswell, they look even better than I had imagined.
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Offline alm

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Re: Low Thermal E.M.F. Binding Post TBP3
« Reply #49 on: February 24, 2023, 01:34:20 pm »
Mine came today. They look great indeed. Thanks a lot for doing all this work, branadic!


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