Return to KLUBNL.PL main page

rsgb_lf_group
[Top] [All Lists]

Re: LF: IC706 & LF/MF transverter

To: rsgb_lf_group@blacksheep.org
Subject: Re: LF: IC706 & LF/MF transverter
From: Wolfgang Büscher <dl4yhf@freenet.de>
Date: Sun, 04 Nov 2007 23:03:32 +0100
In-reply-to: <021301c81f25$796e9380$6d3e6a58@wgt01>
References: <017a01c81f14$1bbeb870$6d3e6a58@wgt01> <472E1BD5.8080803@freenet.de> <021301c81f25$796e9380$6d3e6a58@wgt01>
Reply-to: rsgb_lf_group@blacksheep.org
Sender: owner-rsgb_lf_group@blacksheep.org
User-agent: Thunderbird 2.0.0.6 (Windows/20070728)
Hi Gary,


Are there any circuits available for this type of transverter please ?

Unfortunately no... only a few photos, since I never made a complete drawing. I built the transverter stage-by-stage, and made a few handwritten notes here and there.
A few photos are here:
http://freenet-homepage.de/dl4yhf/lf_trans.html
(quite outdated; the preselector has been replaced with a 4-pole version since then).
The discrete Schottky ring mixer (using 4 matched BAT42's or similar) is 
driven with some ten milliwatts from the 10 MHz OCXO, but an IE500 or 
similar would be easier. The same mixer is used for RX and TX. Besides 
that, there is an HF VOX for the RX/TX switching, driver, and final with 
four MOSFETs running at 12 Volts DC. But today, I'd use a higher voltage 
for the final, since 24- or even 48 V SMPSU are easy to find these days 
(even without built-in LF QRM generator ;-)
73, 
 Wolf .

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