Surprisingly, I have two MFJ 4125s and they are quiet electrically. I have also added a thermistor controlled fan speed controller to them so that they are silent (sonically) when ticking over and pro

Well said, Andy. The current silly system is putting more experienced types off the licence and is heavily biassed towards 'young starter' types. Fill in the survey. I just did. If I could pass the ol

Oooooo. I did go into CAN ages ago and the major application (8 million+ units) ended up being better served by OneWire sensors from Dallas Semi. My design happened to use Microchip (PIC) in the power

They say 57.6 VDC. However, with surgery that might be tweaked further...... https://www.eltek.com/products/flatpack2-48v-she/

Think this from ON7MOR points you in the right place: http://users.telenet.be/on7mor/on7mor3_bestanden/image017.jpg

OT. At least a couple of us on here worked with Paul Turner at Plessey Microwave. He moved on to Jaybeam (production manager) in about 1988. He kept the standards up and they were always a wonderfully

This will sound daft but..... The DIP versions went to 500 MHz plus a bit The SMT versions go to 800 MHz plus quite a bit (1 GHz wouldn't be out of the question) The DIP versions are now virtually uno

Unfortunately, some of the software is very lacking. My brother [N7DR - G4AMJ] bought a RigExpert Zoom antenna analyzer (think only to 30MHz). He says the Linux s/w for use with it was awful (he runs

Having thrashed the VNA market to death, with mixed results, now spectrum analyzers are fair game. I couldn't bring myself to buy a product that doesn't show kHz and MHz properly on the display! Other

I had a quick look through the Microchip line. I _think_ the bag has the wrong product in it. You might want to check that all the chips are the same (they may be a mix of 5 and 6 pin?) try looking at

Yes, reed. You can see by the timing quoted. Daico moved on to PIN and GaAs switches, making this obsolete. Interesting that the one shown here is only 6 serial numbers away from the one on eBay. Very

For small batteries, it's worth a browse through some of the Big Clive videos on YouTube - showing good 'uns and, well, the ones like were spoken of here! As a previous blue water sailor on my 36' sai

'snot robust. Better way to do this (by far) is jabber server and client such as Pidgin (yes, correct spelling). Allows encryption and time-outs that are better and more reliable than Skype, etc. with

Ian you have hit the nail on the head. I wasn't going to comment on this...but. I've used 450Hz on CW since my early days 48 years ago (!). In fact, this is preferred by many more people than you'd im

Yep, Radiall. 4 = DC to 18 GHz 3 = Latching, 2 coil 2 = 12 V Gleaned from present day catalogue. 554 series is outdated, but product codes still structured the same.

Errrrrr, the FCC is taking away that and other bands for 5G/other stuff, with no provision for us lowly amateurs. What of OfCom intentions? I'm out of touch, but these things are likely to go global.

It's 7-18 GHz https://www.ebay.co.uk/p/22025950282

This product range ended up with MAcom. You could request info at: https://www.macom.com/products/product-detail/2020-4018-20 In the main table they indicate that these are one octave only, yet the 40

As the author (and hoster) for many years of the most widely used RF Exposure Calculator, I have a few comments. http://hintlink.com/power_density.htm This was originally written to support the FCC re

Yes, it could well be. I think they copied the Plessey process. Depending on the application, the box may be Titanium. However, you may find it is silver-loaded epoxy and somewhat easier to remove. Wh