Topband: Receiver protectors.

In a thread back in January, 2020 on connecting receive antennas for top band, a few fellows mentioned a review that I wrote in 2014, where I compared the DEO RG‐2000M and DXE RG‐5000 Receiver Protectors. I have updated my review with new measurements, additional theory of operation, more

Re: Topband: CQ...CQ...CQ

Yes, lets do it, Carl, N6TVN. On 3/17/20 4:15 PM, VE6WZ_Steve wrote: With many hams around the world staying home and "practicing social distancing” to “flatten the CV-19 curve”, what a great time to be on the radio! Lets get out there and call CQ to stir up the band. (or ANY band for that

Re: Topband: CQ...CQ...CQ

Great Idea!!! Keeps Ham O Holics Alive Val Sent from Mail for Windows 10 From: Topband on behalf of VE6WZ_Steve Sent: Tuesday, March 17, 2020 7:15:02 PM To: topband Subject: Topband: CQ...CQ...CQ With many

Topband: CQ...CQ...CQ

With many hams around the world staying home and "practicing social distancing” to “flatten the CV-19 curve”, what a great time to be on the radio! Lets get out there and call CQ to stir up the band. (or ANY band for that matter) There may be some out there that somehow think calling CQ is

Re: Topband: Slightly OT - amplifier noise

Roger, I didn't realize that the 1025 (which is what I have) didn't have a preamp on the auxiliary (noise) antenna input! I chose the 1025 over the 1026 because I did not want the small whip antenna, which only works well if you have RFI close to it. If I would have realized that the 1026

Re: Topband: Slightly OT - amplifier noise

On 3/14/2020 4:07 PM, Jim Brown wrote: Another good advantage to the electronic schemes is that you don't have to go outside to rotate them when the noise that's bothering you is coming from a different direction. 73, Jim That is an interesting idea. I have been trying to figure out

Re: Topband: Slightly OT - amplifier noise

On 3/17/2020 10:26 AM, Mike Waters wrote: That being the case, shouldn't noise tests be done on 160 or 80 meters, rather than 10 or 15 meters? In my tests of my NCC-1, I found it pretty useless above 40M. It accommodates optional preamps; it's driven by a K9AY 8x4 matrix switcher, which

Topband: Slightly OT - amplifier noise

Having just read some of these posts, I just did a few tests on my MFJ-1025. (bought mine second-hand very cheap - a lot of people buy these thinking they will get rid of any noise!) I modified it to become a 1026 . . . you definitely need the extra pre-amp for the "Noise Antenna", especially

Re: Topband: Slightly OT - amplifier noise

Mike, is there any reason why you tested it above 20 MHz? That's outside the 1026's specified frequency range. 73, Mike W0BTU On Tue, Mar 17, 2020, 9:07 AM Michael Tope wrote: > I just happen to have a spare MFJ-1026 at home. I did a real quick test > using my FT1000MP MK-V while powering the

Re: Topband: Slightly OT - amplifier noise

Tom Rauch, W8JI has a nice webpage dedicated to the MFJ-1025/1026 at https://www.w8ji.com/mfj-1025_1026.htm. A few relevant excerpts follow. "The only drawback of the higher noise floor of the MFJ-1025/1026 is you *must place it after any amplifiers used with low-level low-noise antennas*. The

Re: Topband: Slightly OT - amplifier noise

Mike, thank and these are great data points you've provided. Questions: Was the MFJ-1026 PHASE control set near zero? That could account for the low AUX gain. *Mike's data* FT1000MP MK-V Main Antenna Path Gain: 10 Meters: 4dB 15 Meters: 3dB Sense Antenna Path Gain (sense-path pre-amp on and

Re: Topband: Slightly OT - amplifier noise

I remember having some experience with that MFJ-1026 a number of years ago and found the trade off of increased noise floor vs cancelling not worth the effort. Trading one evil for another evil. Obviously, when confronted with noise mitigation, everything is on the table. Ed N1UR

Re: Topband: Slightly OT - amplifier noise

I just happen to have a spare MFJ-1026 at home. I did a real quick test using my FT1000MP MK-V while powering the MFJ-1026 from an Astron supply. Similar to your results, Steve, I got about a 12 to 14 dB increase in the noise floor on 10 meters when the MFJ unit was turned on and connected to