[TowerTalk] SO-239 bulkhead adapter

[Pete Smith N4ZR]

Hi John - what you're describing sounds a lot like a clamp-type PL-259.  
both these and crimp PL-259s are widely available on ebay, from the RF 
Connection (www.therfc.com) and all the usual suspects.

73, Pete N4ZR
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On 4/3/2013 11:23 AM, John E. Cleeve wrote:
> If I recall correctly, the example of the SO-239 bulkhead adapter I
> described was manufactured by Greenpar Engineering, in Harlow, UK.
>
> Greenpar Engineering also manufactured a very easy to install PL259 plug
> which included a knurled tube as part of the plug body, the knurled tube
> slid between the exterior of the centre conductor insulation and the
> interior surface of the braid, with the outer cover of the cable remaining
> in place, as the plug was fitted to the prepared cable, the electrical
> integrity of the plug body to the cable braid was ensured by means of an
> "O" ring which fitted the exterior diameter of the coax cable. The "O"
> ring was slid into position over the knurled portion of the tube, and was
> tightened by means of clamping two "ears" 180 degrees apart on the "O"
> ring, thus reducing the diameter and clamping the braid to the knurled
> tube. The clamping tool was a simple pair of pincers.
>
> Sadly, Greenpar Engineering seems to have ceased to exist, but I think the
> origin of the "O" ring clamping method for coaxial outer braid using the
> modified PL259 plug design, was hose clamps used for miniature flexible
> tubing, and the manufacturer of the "O" rings, and clamping pincers, was
> Oetiker, and that company does still trade.
>
> Sincerely, John. G3JVC/GM3JVC.
>
>
>
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