[AMRadio] new antenna and matchbox a bust.

Brett gazdzinski brett.gazdzinski at verizonbusiness.com
Tue Jan 30 21:49:52 EST 2007

Sounds interesting!
I don't know what is important here, surely in a kilowatt
tuner you don't need to worry about QRP sensitivity.
It needs to be good for the frequency, up to 30 Mhz
if the meters are supposed to work up there.

Not sure why the diodes blow out, some sort of spike?
Then no matter what diodes I use will likely blow out.
Maybe I should mount sockets on the back so I can
swap them out easy...


> -----Original Message-----
> From: amradio-bounces at mailman.qth.net 
> [mailto:amradio-bounces at mailman.qth.net] On Behalf Of John Lawson
> Sent: Tuesday, January 30, 2007 2:28 PM
> To: Discussion of AM Radio in the Amateur Service
> Subject: Re: [AMRadio] new antenna and matchbox a bust.
> On Tue, 30 Jan 2007, Geoff/W5OMR wrote:
> >
> > No disrespect intended, but that last statement alone, is 
> enough for -me- to 
> > NOT want to use them.
> >
>     I think its referring to 'mining' the Ge diodes out of 
> those "polluted" 
> devices, Geoff.
>    And, as we all know: 'Partz is Partz...'
>     Anent this discussion, germanium diodes are certainly 
> avaialble, and 
> not that expensive.  I have a drawer or two of the older 
> (late 50s) units, 
> but I'm savin' 'em for eBay, to finance my retirement.
>     See www.mouser.com, part number 621-BAT54AT-F  a Shottky 
> diode with 
> 240mV forward drop - 60 cents each.  And that was the first 
> one I landed 
> on - a bit of research will find more and better units for this 
> application.
>    Cheers
> John
> DM09fg
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