Is there a means of testing a 9:1 0r 10:1 balun to make sure
it is the proper impeadance?

Radio Man wrote:

Is there a means of testing a 9:1 0r 10:1 balun to make sure
it is the proper impeadance?

Yes, there is, but it takes some special equipment. The best bet is to have the
proper toroid, wind it according to the formula and you shouldn't have any
problem.

http://members.aol.com/DXerCapeCod/z_transformers.pdf

http://www.dxing.info/equipment/impe...ing_bryant.pdf

dxAce

"Radio Man" wrote in message
newsRo3d.4622$Ii2.1816@trnddc09...
Is there a means of testing a 9:1 0r 10:1 balun to make sure
it is the proper impeadance?

Perhaps you could borrow one of the MFJ antenna analyzers from a ham
friend- terminate the balun in a 450 Ohm (9:1) or 510 Ohm (10:1) resistor
and tune across HF bands - you should see a low VSWR. Note that toroidal
transformers have quite a narrow bandwidth over which they are actually 9:1.
Binocular cores will increase this BW over 10X.


--
Dale W4OP
for PAR Electronics, Inc.