Search found 144 matches

by Nosferatu
Thu Feb 02, 2012 8:43 am
Forum: Amateur Radio
Topic: Weird chanting on 40m band
Replies: 5
Views: 1650

Weird chanting on 40m band

Do anyone ever heard of these transmissions ? They can go for hours on exactly 7.0 Mhz (40m) http://www.youtube.com/watch?v=eNnl3yDc72c&feature=related http://www.youtube.com/watch?v=svulI7_C4k0&feature=related http://www.youtube.com/watch?v=0qoiwqCzQnE&feature=related http://www.youtube.com/watch?v...
by Nosferatu
Thu Jan 12, 2012 9:15 pm
Forum: General
Topic: Interesting vehicle with antenna
Replies: 3
Views: 3646

Interesting vehicle with antenna

Do anyone ever seen this kind of vehicle ? :smt017

Image
by Nosferatu
Thu Dec 22, 2011 1:14 pm
Forum: General Scanning
Topic: Narrowband Radios
Replies: 5
Views: 2090

Re: Narrowband Radios

Recently I ask someone in a Facebook Narrowband discussion group about what sort of receiver they are using for this kind of broadcast and they said that the narrowband subscribers use special custom made receivers that are fixed to the broadcast frequency and cannot be changed to any other frequenc...
by Nosferatu
Tue Dec 20, 2011 9:18 pm
Forum: General
Topic: Whip or antenna
Replies: 12
Views: 5394

Re: Whip or antenna

You guys just gave me an idea :twisted: ... I have a whip antenna lying on the back seat of my car ... next time someone ask me for money again at the carpark I will use it as a whip against them ... :smt065 (I'm serious) I assume you mean at about 50 seconds where he says "it's not an antenna, it's...
by Nosferatu
Tue Dec 20, 2011 8:57 pm
Forum: Shortwave
Topic: QSL Cards from shortwave stations
Replies: 3
Views: 4244

Re: QSL Cards from shortwave stations

I guess I just started the hobby a little bit too late ... #-o
by Nosferatu
Tue Dec 20, 2011 2:03 pm
Forum: Shortwave
Topic: QSL Cards from shortwave stations
Replies: 3
Views: 4244

QSL Cards from shortwave stations

Has anyone ever received any QSL cards from any shortwave stations ... I have been listening to http://english.cri.cn/index.htm , emailed them and they mentioned my name in their next broadcast \:D/ ... I got really encouraged after that and push my luck by giving them signal report and ask for a QS...
by Nosferatu
Thu Dec 15, 2011 1:07 pm
Forum: Amateur Radio
Topic: Advanced Licence
Replies: 71
Views: 20942

Re: Advanced Licence

Image

Definitely you don't want to put the APRS in the Batmobile either ...

:smt044
by Nosferatu
Thu Dec 15, 2011 10:02 am
Forum: Amateur Radio
Topic: Advanced Licence
Replies: 71
Views: 20942

Re: Advanced Licence

Well done Ron. Good to see such enthusiasm for a "dying hobby" (not my words) Dying Hobby ... ? Really ... ? You can still pass the examine without ANY recall for oscillator theory :roll: You are right Rob, I didn't get any questions on oscillators ... instead I have got one on flux capacitors :smt...
by Nosferatu
Thu Dec 15, 2011 8:15 am
Forum: Amateur Radio
Topic: Advanced Licence
Replies: 71
Views: 20942

Re: Advanced Licence

VK6ZMS wrote:The oscillators Doug ..... Tell him about the oscillators muhaaaaa :twisted:
You know what ... those oscillators are nothing compares to the paper works after the exams ... that's when the real exam begin ... :smt021
by Nosferatu
Thu Nov 17, 2011 9:25 am
Forum: Amateur Radio
Topic: 1:1 Balun Current Type for VHF range
Replies: 11
Views: 2914

Re: 1:1 Balun Current Type for VHF range

Yeah, definitely I will give it a go if I don't receive the Unadilla W2DU 1:1 VHF Balun that I ordered a few days ago ...

What I will do is to use the PVC spreader for the quad as the choke balun former ...
by Nosferatu
Wed Nov 16, 2011 10:55 am
Forum: Amateur Radio
Topic: 1:1 Balun Current Type for VHF range
Replies: 11
Views: 2914

Re: 1:1 Balun Current Type for VHF range

A choke balun might do the trick. For VHF, 5-10 turns of RG-58U around some PVC pipe (25mm or 32mm diameter). As close to the antenna feed point as possible. Also make sure the feed line is perpendicular to the elements (ie try not to run the feed parallel to anything on the antenna. Also-also use ...
by Nosferatu
Tue Nov 15, 2011 3:17 pm
Forum: Amateur Radio
Topic: 1:1 Balun Current Type for VHF range
Replies: 11
Views: 2914

Re: 1:1 Balun Current Type for VHF range

Yeah definitely it also sound awesome ... ! Anyway I have been trying hard to browse the internet looking for a detailed instructions on how to actually make this bazooka ... All I can find was just diagrams that explain how everything is connected ... However I found this instruction with nice phot...
by Nosferatu
Tue Nov 15, 2011 2:23 pm
Forum: Amateur Radio
Topic: 1:1 Balun Current Type for VHF range
Replies: 11
Views: 2914

Re: 1:1 Balun Current Type for VHF range

I was just reading this article about unbalanced line and balanced antenna (in this case is the driven element of the quad which happened to be a full wave loop ) If we transmit in this manner it will make the transmission line become part of the antenna and radiate RF ... apparently it beat the pur...
by Nosferatu
Tue Nov 15, 2011 9:01 am
Forum: Amateur Radio
Topic: 1:1 Balun Current Type for VHF range
Replies: 11
Views: 2914

1:1 Balun Current Type for VHF range

Hello ... !
Does anyone know where to get a 1:1 Balun Current Type for VHF range locally ?
Similar to W2DU VHF-B from http://www.unadilla.com/?p=97 ... I made my homebrew 2m 4 elements quad http://www.youtube.com/watch?v=zgQiISj4cc4 and I'm trying to improve it by putting a 1:1 balun to it ...