Re: [Elecraft_K3] K3 & TMP connectors

Jarmo Blomster

Hey Wayne & all, I didn't mean that K3 should be refactored. We are speculating imaginary K4, aren't we?
The TMP connectors in K3 bothers me a lot but I can stand them, even if they are not so rugged either.
I have had TMP jack that center spike is not any more in place because I've pushed the plug in wrong angle: you can't see where you push the plug if it's behind a shield.

The TMP connectors price muat be fraction of the connectors I mention but in any the connector price must be a fraction of the rig price (rig price is 2000$, proper connector price is maybe 1$)

Anyway thanks all for the discussion, see you on the bands

CUL 73 & HNY de OH8KVA, Jarmo

2013/12/31 Mel Farrer <farrerfolks@...>



I love the TMP connectors and have a long nose pliers with a tip right angle  that allow easy twist for insertion.  I don't remember where I got them, but they do the job better than straight long nose.  Cheers,

Mel, K6KBE

On Monday, December 30, 2013 2:02 PM, Wayne Burdick <n6kr@...> wrote:
Hi Jarmo,

Thanks for the additional input.

We looked at all of these connector families. They all have serious disadvantages, which is why we (and many RF product manufacturers) are using TMP connectors.

TMP connectors occupy far less space than SMA/SMB/SMC. They're far more rugged than MCX/MMCX/U.FL. And they're a small fraction of the cost of any of them. Switching to other connectors would force us to redesign the K3 to be larger, change most of the internal shielding, and increase the price by something in the hundred-dollar range.

Better to just live with the little twist required to get TMP connectors plugged in :)


On Dec 30, 2013, at 12:30 PM, Jarmo Blomster <jarmoblo@...> wrote:

> Hi Wayne,
> I wish to see something like SMA/SMB/SMC or maybe MCX or MMCX or even U.FL.
> They are also very small, have excellent RF performance, can be directly mount on PC boards  and when you connect them you know when they are in place.
> This is just my wish list to Santa.
> 73 de OH8KVA Jarmo
> 2013/12/30 Wayne Burdick <n6kr@...>
> Jarmo,
> TMP plugs are a little fussy to insert, I agree, but they solve multiple problems and are not easily replaced with something else. They have very high retention; are very small; directly mount on PC boards; and can be arranged so they contact sheet metal when required for grounding. They have excellent RF performance, too.
> 73,
> Wayne
> N6KR
> On Dec 30, 2013, at 12:20 AM, Jarmo Blomster <jarmoblo@...> wrote:
> >
> > If I should choose just one, then it is 5) better sockets for internal coaxial cables.
> ------------------------------------
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