50 ohm feedline to HQ-140-X
 

I would like to hook up an antenna fed with 50 ohm coax to my Hammarlund
HQ-140-X receiver. Can anyone point me toward a source for a commercial
balun or plans to make one?

73 de Kevin, K0UD

Kevin Lunde wrote:

I would like to hook up an antenna fed with 50 ohm coax to my Hammarlund
HQ-140-X receiver. Can anyone point me toward a source for a commercial
balun or plans to make one?

Here's a website that describes how to build a low noise inverted-L
antenna with a homemade balun for the coax.

http://www.anarc.org/naswa/badx/ante...e_antenna.html


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Kevin,

You may have some reasonable success using a cable television balun. These
are available at radio shack or other parts supply houses and are very
cheap. I've played around with several of them. Most exhibit response
roll-off as you get down to 80 meters and below. Depending on what you want
to pick up, this may or may not be a problem. They are designed to match
300 ohms to 75 ohms. This should be close enough for SWL work. You will
have to purchase or make an adaptor to go from PL-259 to F.

Good luck


"Kevin Lunde" wrote in message
...
I would like to hook up an antenna fed with 50 ohm coax to my Hammarlund
HQ-140-X receiver. Can anyone point me toward a source for a commercial
balun or plans to make one?

73 de Kevin, K0UD





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In article , Scottm wrote:

You may have some reasonable success using a cable television balun. These
are available at radio shack or other parts supply houses and are very
cheap. I've played around with several of them. Most exhibit response
roll-off as you get down to 80 meters and below. Depending on what you want
to pick up, this may or may not be a problem. They are designed to match
300 ohms to 75 ohms. This should be close enough for SWL work. You will
have to purchase or make an adaptor to go from PL-259 to F.

I find they are pretty doubtful even on 40M, but they are great on six and
ten. You can pump ten watts through one without any real problem for
transmitting on 6M, too. Losses might be too much to do that on lower
bands.

75 ohm feedline is cheap, and of course a dipole cut for the band should
be a 75 ohm load to begin with.
--scott

--
"C'est un Nagra. C'est suisse, et tres, tres precis."

Just attach the coax to the antenna screws and forget it! You have an
antenna trimmer on the radio.

"Kevin Lunde" wrote in message
...
I would like to hook up an antenna fed with 50 ohm coax to my Hammarlund
HQ-140-X receiver. Can anyone point me toward a source for a commercial
balun or plans to make one?

73 de Kevin, K0UD






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