Gold and aluminium - purple plague. Discovered this when soldering gold O rings using aluminium as a jig. The gold disappeared into the aluminium leaving a purple residue. It is also a problem with tr

Bicon X1 finds it's main use for joining copper and aluminium also aluminium and aluminium in power distribution. Although tested with a meter it may seem non conductive it has zinc particles. I have

Callsign: G6ZME/P / GC6ZME/P Locator: Roving in Wales on the way to Lancashire Bands: 24GHz 500mW 60cm cassegrain. Talkback: ON4KST, Zello SHF Chat, Tel: 07967 272185. Sorry no .390 Times: Various mov

Hi David, I will be using WG17 on my EME system because the TWT PA, and the feed are WG17. I have WG17 switches. I will need to build a preamp and could do with couplers for testing. I have plenty of

Fascinating to dig around. The connector was developed in the 1980's and originally designated as the OSP™ connector by M/A-Com (Microwave Associates). The other connector was the OSM which became the

My suggestion is a Push-on SMA. It is a pity we cannot see inside to the insulation. I believe these are used in production for testing. Paul G8AQA

We are proposing to go out roving with the 24GHz kit on Sunday for the 24GHz etc Championship. We intend to visit a site on the Welsh border on the way up to Lancashire, where we hope to visit a numbe

I agree about them being counterproductive in VHF + contests. Too much time wasted checking them. May be ok on HF cw contests. Paul G8AQA

Sounds to me like poor susceptibility performance of broadband equipment. G8AQA

I had a lot of wideband noise particularly in one direction. I temporarily put in a switchable bandpass filter before the Bulgarian SG Lab masthead preamp. In the worst direction the drop in backgroun

John, Thanks very much for the info. I saw the 328-110053 on ebay and the powers quoted were much higher. HF 650W, 430MHz 300W, 2.4GHz150W. I was not sure about the info from ebay. I wonder if it is t

BTW the 300-10578 is also transfer. Paul

Hi John, I was wondering if your Amphenol catalogue would reveal any info on 300-10578 26V TNC or 328-11005-3 26V Transfer N type. Any rating or frequency info would be appreciated. 73 Paul G8AQA

The delay is why the telephone system will not use 2 satellite links on a telephony circuit. It was thought that satellites would replace undersea cables. However ...... Paul G8AQA

I have seen this being sold at scrap prices at a round table so it is worth hunting. Paul G8AQA

Hi Geoff, Pity you weren't operating today. There is a pretty good chance we would have made a QSO from Brown Clee. Managed a GM. I was operating G3ZME/P from IO82 . Next on Brown Clee on 27th Septemb

Hi Conrad, Never dealt with him. http://millimeterwave.free.fr/Matos_F.htm 73 Paul G8AQA

Old bits of kitchen worktop are good for making formers and for supporting them. I have made a bender for 1" square tube but it was part of a circle so could simulate a traditional plumbers pipe bende

Make your own coupler. http://www.w1ghz.org/antbook/conf/High-Power_Directional_Couplers_with_Excellent_Performance.pdf Probably necessary to use good quality N types. Paul G8AQA

It should be remembered that GRP although generally non conductive, does have a dielectric constant greater than that of air. In the region of 4. This will upset the field and absorb power. So it will