[Lowfer] Equip Advise??????????

[Bob Roehrig]

On Sat, 8 Jun 2002, Kristjan Ragnarson wrote:

> Anyway, in regards to the Palomar VLF converter, anyone have
> praises/damnations? What, if any, advantage of converting to 3.5-4.0 mhz
> as opposed to 4.0 -4.5 mhz? I am of the opinion that the 4.0-4.5 mhz
> readout on a receiver would make the mental arithmetic easier.

It's been a while since I have looked at the Palomar schematic (it's
buried around here somewhere) but doesn't it use the 1496 balanced mixer
chip?

One thing comes to mind from memory: There is a way to install a pot to
null out the osc from the output (carrier null if it were used in a SSB
rig). I recommend doing this to reduce the xtal osc level in the output. I
don't recall that Palomar did this.

I would use an IF of 2 to 3 MHz as there is little activity there and less
likelyhood of unwanted signals leaking thru.



                    73        Bob Roehrig        K9EUI
                    Aurora University Telecom/IS dept.
                    630-844-4898   broehrig@aurora.edu