Re: LF: VU2BGS

[Gaj Kumar <bsgkumar@gmail.com>]

Dear Jacek 

Thanks for the good tips . 

I found a local company who claimed to sell Ferrite rods 

He sent me these impeder cores , I stuck several of them together to make a 1 foot long ferrite tube 

Testing as antenna for 160m was a failure , it had very poor Q .

now I am glad i can use it for 470khz or 137 khz .

glad that i have now a good use . will let you the performance soon 

73 

Kumar 

VU2BGS

On Thu, Dec 27, 2018 at 3:50 AM Jacek Lipkowski <sq5bpf@lipkowski.org> wrote:

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 <selberdenken@posteo.de>
> Reply-To: rsgb_lf_group@blacksheep.org
> To: rsgb_lf_group@blacksheep.org
> 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: owner-rsgb_lf_group@blacksheep.org
>       >[mailto:owner-rsgb_lf_group@blacksheep.org] On Behalf Of Gaj Kumar
>       >Sent: Wednesday, December 26, 2018 9:40 AM
>       >To: rsgb_lf_group@blacksheep.org
>       >Subject: Re: LF: VU2BGS
>
>
>