Search found 126 matches

by vk7jj
Sat Aug 18, 2018 6:22 am
Forum: SDR Antennas
Topic: Mains noise
Replies: 10
Views: 3929

Re: Mains noise

Hi guys, I've temporarily (I hope) injured my left eye after my eyeball was stuck by a small burning ember, I'm out of action for the mean time, apologies.
by vk7jj
Sun Aug 12, 2018 7:41 am
Forum: SDR Antennas
Topic: Mains noise
Replies: 10
Views: 3929

Re: Mains noise

Hi again. Sorry about the large graphics in the previous post caused by my screen grabs being 144 dpi. I forget to resample them. Likewise forgive the delays between posts. OK. There here are three obvious parts of the mains interference problem to think about ranked in probable ease of doing someth...
by vk7jj
Tue Aug 07, 2018 1:25 am
Forum: SDR Antennas
Topic: Mains noise
Replies: 10
Views: 3929

Re: Mains noise

Hi guys and thanks for the comments! Instalment number two of this breathtaking thread is at hand. We can't look towards "what we can do about it" until we sus out more of the problems and then visualise a possible goal we might work towards. So here goes with that. We are our own worst en...
by vk7jj
Thu Aug 02, 2018 5:50 am
Forum: SDR Antennas
Topic: Mains noise
Replies: 10
Views: 3929

Mains noise

There are excellent discussions already happening with excellent input from a number of people about electrical noise. In my own location I have determined by experimenting over a year or three that most of my unwanted interference is mains borne and is conveyed to me by a) being radiated from mains...
by vk7jj
Sun Jul 08, 2018 2:31 am
Forum: General
Topic: Testing RSPduo receiver sensitivity with noise generator
Replies: 51
Views: 9036

Re: Testing RSPduo receiver sensitivity with noise generator

Yesterday I received a brand new Rig Expert's AA-30.ZERO Vector Impedance Anayser. Hello Gianfranco, what a thrill! That will keep your imagination and fingers occupied for quite some time to come! As mentioned in my message we lost internet for nearly two and a half days, we depend on a fixed-wire...
by vk7jj
Tue Jul 03, 2018 11:42 pm
Forum: General
Topic: Testing RSPduo receiver sensitivity with noise generator
Replies: 51
Views: 9036

Re: Testing RSPduo receiver sensitivity with noise generator

Dear Gianfranco, so sorry I missed your message, I don't log in unless I wish to post and so it remained invisible, please accept my apologies for that. Your chart above is an interesting view of the data, well done. Great to hear that signals are good too, despite what are at the moment very poor b...
by vk7jj
Mon Jul 02, 2018 12:02 am
Forum: General
Topic: Testing RSPduo receiver sensitivity with noise generator
Replies: 51
Views: 9036

Re: Testing RSPduo receiver sensitivity with noise generator

Hi Gianfranco, The results are too good to be true I felt vicarious pleasure being to be able to copy and paste that happy comment! Regarding the last table of results I posted that you have asked me to check, the significant difference would likely be feeding it from the bottom directly against gro...
by vk7jj
Sun Jul 01, 2018 7:38 am
Forum: General
Topic: Testing RSPduo receiver sensitivity with noise generator
Replies: 51
Views: 9036

Re: Testing RSPduo receiver sensitivity with noise generator

Great pics, Gianfranco, lovely day for you and us, beautiful winter sun all day. We have our house on the market and today was an inspection which kept us busy in preparation. BTW it was good of you to put out that extra couple of chairs for us, sorry we couldn't make it. We are settling in to a nic...
by vk7jj
Sat Jun 30, 2018 8:36 am
Forum: General
Topic: Testing RSPduo receiver sensitivity with noise generator
Replies: 51
Views: 9036

Re: Testing RSPduo receiver sensitivity with noise generator

Here is the 2-14MHz table
g-b-2-14.png
g-b-2-14.png (121.23 KiB) Viewed 1421 times
by vk7jj
Sat Jun 30, 2018 8:24 am
Forum: General
Topic: Testing RSPduo receiver sensitivity with noise generator
Replies: 51
Views: 9036

Re: Testing RSPduo receiver sensitivity with noise generator

Hello again Gianfranco, I'm not like the soothsayer in Antony & Cleopatra "In nature's infinite book of secrecy, a little I can read", the reality is I'm like the blind theologian looking in a dark room for a black cat which is not there. The problem is my conceit and impatience someti...

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