[Lowfer] Cheap up-converter kit?

Thu, 9 Oct 2003 18:33:18 -0400

FYI

my 756 non pro was used for the IF of my HB converter until we went to 
long QRSS over 30 Sec dots. Then the 1 to 2 cycle drift at 4 Mhz was a
PITA

My converter consists of a good Double Balanced mixer. I terminated each
port
at 3 Db. Then used a 4 Mhz clock osc to drive the thing. I coupled the
RF/IF LO into it
direct through the 3 Db pads. It works great down to DC. I could use more
power at 
the LO ( 4Mhz clock osc) and planned to add a gain stage     but have had
no problems
with overload so I havent done this yet, As a stand alone mixer I then
was able to switch 
in different RF stages. I find the Burhams loop amp that I am evaluating
drives the mixer
and I dont need additional amplification in the shack.

The Clock Osc is right on freq, no drift .

Also look into the AMRAD LF converter in a past QST. 

I went with the DBM approach as it was what was laying on the floor in
the shop

HAR

I suspect most f the commercial LF converters will be OK for general
listning but not good
for QRSS

Bob  K3DJC

On Thu, 09 Oct 2003 17:16:34 -0400 Dale Parfitt <[email protected]> writes:
> 
> 
> W1EOF wrote:
> 
> > Was it in this group that someone recently mentioned a low-cost 
> upconverter
> > kit? I went to the site and it looked like a nice little kit, the 
> price was
> > only $12.00
> >
> 
> Hi Mark,
> I too would be interested. Although I have yet to put the sig gen on 
> my 756PRO-
> I bleieve it gets a bit deaf below 200 KHz. To the oldtimer LFers- 
> what kind of
> stability can we expect out of an upconverter.
> 
> Dale W4OP
> 
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