[Boatanchors] Marconi TF1020A

[Dave Brown]

Certainly. It's not 50 ohms so the rig wont load up with the same pi 
net settings as for a nominal 50 ohm load though they wont be very 
much different. An excellent resistive dummy load/power meter, 
nevertheless.
 A caveat- and an important one. The female N connector on the front - 
if its original- should be a 75 ohm one. Dont try and mate a 50 ohm N 
male connector to it or its female centre pin (now there's a 
'irishism' if ever there was one!) will be permanently damaged.
You need to find a 75 ohm N to UHF (or whatever) adaptor or else build 
or buy a 50-75 ohm wideband transformer. Marconi actually made these 
transformers back when the world was changing to 50 ohms so their 
customers with existing 75 ohm RF power meters couild keep using them 
in the brave new world. A 100 watt transformer takes up not much more 
than a cubic inch or so-not including connectors. Ferrite cored, 
naturally.
73
 Dave, ZL3FJ



----- Original Message ----- 
From: "Bob Young" <youngbob53 at msn.com>
To: <boatanchors at mailman.qth.net>
Sent: Monday, March 26, 2007 5:58 PM
Subject: [Boatanchors] Marconi TF1020A


>I just bought one of these for a dummy load and power meter, but 
>found out it is 75 ohms in and out, can I use this for my DX-100?
>
> Bob young
> KB1OKL
>
>
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