Instead of ferrite rods from AM radios, search for "impeder" rods. These
are used for induction welding of pipes, and can stand high power at
hundreds of kHz. Sometimes you can get them cheap on auction sites.
I use one to match my 40m longwire antenna on 630m. When tested on the
bench it survives 100W without problems. It also makes a nice receive
antenna (few of then can be stacked in a long tube).
VY 73
Jacek / SQ5BPF
On Wed, 26 Dec 2018, DK7FC wrote:
Date: Wed, 26 Dec 2018 19:42:05 +0100
From: DK7FC <[email protected]>
Reply-To: [email protected]
To: [email protected]
Subject: Re: LF: VU2BGS
...I know someone who clandestinely removed the ferrite rod of a radio of his
XYL (now ex XYL) beeing able to receive the MF AM
broadcast. Many radios, if not to modern offer 'FM/AM' radio but AM is not used
by most people. So this rod can be used to build a
matching unit for a 630m band antenna. And of course the core material is
suitable because the antenna is used for this frequency
range.
However one has to take care that no local QRM sources are picked up with a
rod. This is the disadvantage relative to a toroid of
course. So better place the core near the antenna, not into the shack.
73, Stefan
Am 26.12.2018 17:03, schrieb Clemens Paul:
Hi Kumar,
>only the ferrites are a big problems here !
You may have a look at
https://www.radio-store.co.uk/
They ship worldwidwe,sell also small quantities and have very competitive
prices.
73
Clemens
DL4RAJ
>-----Original Message-----
>From: [email protected]
>[mailto:[email protected]] On Behalf Of Gaj Kumar
>Sent: Wednesday, December 26, 2018 9:40 AM
>To: [email protected]
>Subject: Re: LF: VU2BGS
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