I just got done taking care of my in home ethernet, a number of runs at 10, 100 and 1000 made for alot of noise. Some of the noise can be from poorly made cables. Many cheap jumpers that come with ge
ADSL2+ operates at up to 2.25Mhz, telephone RFI filters often cover down into this range. In my case, underground service but space limited (all antennas < 50 feet from telephone cabling, primary < 3
As we all know, a grounding system is not a magik blackhole into which RF vanishes, but the lower the RF impedance the better. I need to do some drainage improvements in my crawlspace, running a fair
Keep in mind that ADSL2+ has signaling up to 2.2Mhz, and that the default S/N threshold to use a channel is normally 6 - 9 db (default varies between DSLAM vendor/model, providers tune based on cable
Yes, you did. I was just providing a bit more specific info as to the effect. I think I have already covered that in several postings. Of course the filter is a considerable compromise in a number of
Depends on the DSL gear, ADSL1 cuts off around 1.1, VHDSL uses much higher freqs. Common use these days in the US is ADSL2+, with ADSL1 hardware cycling out of production. Also, remember that RF can
DSLAM: Digital Subscriber Line Access Multiplexer (Terminates the upstream side of the DSL line, 24, 48 and 512 port chassis are common. Back side of the DSLAM will normally be ethernet or ATM depend
Looking at the online site, the final impedance cure charts that show 1 2 and 3 turns and figuring from there. I am using the 2.4 in for coax, for the phoneline and DSL on the small cores they are wr
Some folks talk about using conductive tape over the COP housing. If I were going to bother (high labor investment) I would use adhesive back copper foil shielding tape. As I understand it, the adhes
Attempting to track down a bothersome very intermittant noise and looking for some ideas. Don't have a decent way to record it, but may need to set something up if I cannot make headway. Noise is pul
Yes, station runs off battery with float charger disconnected from wall. Have not done a shutdown specific to tracking down this one but have noted it multiple times while doing a circuit by circuit
I have a Grundig SW rig, but I find the HT (wideband receive w/ AM) with a step attenuator and a small shielded loop to be more useful. Also have a simple coax faraday pickup for in close. The issue
So, as some suggested it was static discharge, just _not_ on any of my antennas. I still have no idea where the apparent modulation on 20M comes in, I discounted it being an AGC artifact because mult
Yep, 300 foot plus longwire was well insulated, with least insulated point being the approx 1/8 inch gap between the centerpin and body/nut of the RCA thru-chassis antenna jack. The last 100 feet or
Had an interesting opportunity last night. Station is currently an Icom 756PROIII with an inverted L like (30ft vertical, 50ft to the side fed at the base through a SGC-237 autocoupler), and a 20M di
Perhaps I did not state things as clearly as they could have been, but you may want to re-read my original message. 2 Antennas about 40 feet apart, the dipole about 10 feet from the closest AC wiring
Jim, I do have noise on both hot, neutral (AC grounded conductor) an by extension AC ground (AC grounding conductor). This can be easily detected with a small coupling loop from any of the AC wiring
Since the shack is battery run, disconnecting the charger and the shack gnding bus connection to the shack ground and the external antenna removes _all_ connections to anything. Running the radio str
My work involves (indirectly) alot of power work, so I have a better than normal understanding of residential AC for a non sparky. AC entrance is opposite side of the house from the shack, 200 amp se
About average, only real good thing is the area is marshy with a high water table, the soil below a foot or so is never dry. I have no unplanned paths, and the signal itself is weak, move away from t