| |
I0OJJ > ANTENN 04.07.10 00:35l 36 Lines 1058 Bytes #-5793 (0) @ WW
BID : 44341I0OJJ
Read: GUEST DG1NDE
Subj: Antenna Question Re HF Handhelds
Path: DB0FHN<DB0MRW<DK0WUE<DB0RES<IK2XDE<IR2UBX<IW2OHX<I4UKI<I0OJJ
Sent: 100703/1856z @:I0OJJ.ILAZ.ITA.EU #:6838 $:44341i0ojj
Hi,
I tried a shortwave radio group first, but no answers.
Should have posted here, first.
Enjoy sw listening, but frankly not all that sharp re antennas.
Over the past few months, I have seen several ads for those handheld sw
receivers and transceivers. From different mfgs.
About the size of the typical hand-held scanner receiver.
They all seem to cover up to at least 30 MHz, and most beyond.
Got to thinking about this a bit.
What do they use for an antenna for 30 MHz and below ?
I have a long end fed antenna for my listening.
Obviously they have a short "something" antenna.
How effective is a short "something" around 5 to 10 MHz, e.g. ?
How can it work down there at all ?
I can visualize s tuned ferrite loop, such as the very old fashioned AM
table radios used to have, but wouldn't this only be effective over a
very small range ?
Or, do they expect you to hook up something "decent" to it, even though
it is supposed to be portable, and is very small ?
Any technical explanation on this would be most appreciated.
Thanks,
Bob
Read previous mail | Read next mail
| |
