Message-ID: <3A9927E3.90237721@sitestar.net>
Date: Sun, 25 Feb 2001 10:42:27 -0500
From: "Rye Gewalt" <ryeg@sitestar.net>
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To: rsgb_lf_group@blacksheep.org
Subject: Re: LF: Re: G3NYK/PA0SE-bridges
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For the benefit of a poor yank who only speaks one language and wished he could
speak several, what's the literal translation of "steckdose"?  I am always
looking for derogatory names for non tinkers and view-grap engineers. I am
soldering iron burns up to my elbows in spite of a (very old) degree in math.
Somehow I like to smell the smoke.....

Regards
Rye
K9LCJ
Springfield, VA

Dick Rollema wrote:

> Uwe, DJ8WX, wrote:
>
> > Dick, where did you get that Wayne-Kerr-B.601-bridge from ?
> > could one  purchase it somewhere?
>
> I have two Wayne Kerr admittance bridges:
>
> Type B601: 15 kHz - 15 MHz
>
> Type B801: 1 MHz - 100 MHz
>
> But my home made noise bridge performs almost as well. I took great care to
> make it frequency independent and succeeded in doing so up to 30 MHz.
>
> I bought the Wayne Kerr bridges for little money in a war surplus shop and
> at a rally of the Dutch Society for the History of Radio.
> You can usually pick up older type of test equipment at rallies at low
> prices because most  present day amateurs are of the "Steckdose" type
> and are not at all interested  in measuring gear.
>
> I tested my bridges by connecting them to a 3 m long piece of RG213 type 50
> ohm coax that was terminated by a 50 ohm resistor (actually two 100 ohm
> resistors in parallel). That produces a standing wave ratio of 2 in the
> cable. The impedance at the input of the cable was measured at a range of
> frequencies up to 30 MHz. When the results are plotted on a RX-diagram they
> must lie on a circle; the one for SWR = 2. For the Wayne Kerr bridges this
> was indeed the case. But the deviation from the circle was also very small
> for my home made bridge. Only 30 MHz near the measured impedances tended to
> lie inside the circle for all three bridges. This was caused by the loss in
> the coax that made the SWR < 2 at the input of the cable.
>
> > BTW.Dick, I just answered ur cq on 136 kHz. sri u did not hear my signal.
> u
> > where 559 in j043sv (ant: inverted V with 340m es 400m lws).
>
> A pity I did not hear you. Perhaps some other time?
>
> 73, Dick, PA0SE