Topband: QRM Eliminator

2022-10-10 Thread Roger Kennedy
This circuit is clearly MUCH simpler than the MFJ units, which uses matching transformers and has several extra stages. Personally, I would find it annoying that the gain isn't unity through the unit. ALSO - I bought a secondhand MFJ-1025 for about $70 . . . but found that I needed to add a

Re: Topband: QRM Eliminator

2022-10-10 Thread Pete Smith N4ZR
Funny (I guess) - we have Chinese manufacturers cloning a Russian design. 73, Pete N4ZR Check out the new Reverse Beacon Network web server at. For spots, please use your favorite "retail" DX cluster. On 10/9/2022 12:35 PM, K4SAV wrote: This link shows a schematic of

Re: Topband: QRM Eliminator

2022-10-10 Thread Martin Kratoska
Nothing against NCC phasers but I would try the PA0SIM phaser http://www.pa0sim.nl/Phaser%2080%20-%2010%20meters.htm before making any decisions. It can be better than any NCC, assumed that the amplifier on the output has fairly low input impedance and excellent IM properties. At least, you

Re: Topband: QRM Eliminator

2022-10-10 Thread Pete Smith N4ZR
That's amazing - there are at least 10 different listings on Amazon, ranging from $54 to $70.  They all appear to be the same box,. 73, Pete N4ZR Check out the new Reverse Beacon Network web server at. For spots, please use your favorite "retail" DX cluster. On