[Top] [All Lists]

Re: Topband: 160m dethroned? 600m the new top band?

To: "mailto:"
Subject: Re: Topband: 160m dethroned? 600m the new top band?
From: Paul <>
Date: Tue, 14 Feb 2012 12:00:44 +0100
List-post: <">>
At 17.16 13/02/2012 -0500, you wrote:
>Somewhere, somebody managed to get a TS-940 to transmit down there at around
>the 10 milliwatt level out of the transverter port. Ive been looking for
>that info but no luck yet.

Ten years a go i managed to pick up the pre-driver output of my FT-990 that 
way: FT990 --->  converter ---> driver with TDA2030 ----> PA G0MRF with 4 
mosfet IRFP450 ---> variometer ----> antenna.  The final output was linear 
(no class D).
I transmitted at 10,137 KHz and the converter had a crystal at 10 MHz if 
you transmit at 10,500 KHz it works but the driver (it is a BF integrate 
amp) does not.  The final stage also works at 500 KHz, with an appropriate 
low pass filter and a good fan, and i was able to do some test SSB/CW.
Here you can find the final: and here my 
construction: (my site 
is in italian language but you can see the pics).
If someone is able to design a good driver (5 or 6 W is enough) we can get 
on the air easy.

Paolo I4EWH

UR RST IS ... ... ..9 QSB QSB - hw? BK

<Prev in Thread] Current Thread [Next in Thread>