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Claustrophobia...?

Hi Keith I'll check it ASAP! The weekend is coming up! Just one more day! Means being able to stop wasting time in the office, and spend it worthily in the radio room (and with XYL). 73 Hans

All (specifically Hans), I've found what I think is a problem with the frequency stabilisation routine in the U2. The manual says: "When using the connected GPS module for frequency stabilisation,

Hi Keith I'm glad it's working Ok. If I had a pound for every time a project worked fine outside the box, and stopped working when I boxed it all up neatly. Actually it happened with my "Ultimate"

Belay that. I've simply restarted it again in FSKCW mode and it seems to be working. To say I don't understand this would be an understatement. 73 Keith.

Right then. My U2 has been working well for over a week so today I decided to do the boxing up thing. After three hours of plastic panel bashing, screwing, fixing and soldering (far more time than

Thanks to all who sent advice. I am ordering some 3.3 regs today. Didn't get any shack tine last night so I have nothing to report back tight now. Will let you know how I get on.

Not sure if this is of any use but I've just measured the 1PPS output of my Reyax UP501 GPS module on a 'scope, 2.8v. (Module runs on 3.3v). I know that this reliably triggers the ATMEGA enough for

Keith Break a 20mm fuse and clean the glass and gunk out of the metal end caps These end caps are a perfect snug fit on the BS170 body. Before pushing on, solder a bit of brass or copper to the end

1)You would probably be able to get away with not heatsinking it. Mine is running 9v with 100% duty cycle. Runs hot but no harm so far. or 2)If you have left a reasonable lead length on the BS170's

As Eddie says, I'd use a decent regulator rather than a zener. Also what are you measuring the 1pps signal with ? A DMM might not have the response time to show it properly, especially if it's a

Hmm, get a 3v3 Regulator.:-) Eddie

Hi Eddie, I originally got my 3v from using a few diodes in series off the 5v reg pin. When this appeared not to work I then tried a pot but I may have limited the current too much with the output

Andy Something is wrong re pin7 showing 0.79v. you have applied your 3v supply and here and you would expect to see that value, likewise with pin 8 the 10k should pull it up to the supply

I would say no. What I have done in the past where space is tight is cut long strips of sticky copper foil the same width as the body of the fet. Seems to work ok 73's De

I've got four BS170s fitted to my U2 kit and will be getting it boxed up in the next few days. Is there enough physical space there to fit four of these clip on

Last night I tried hooking up the gps module to the U2 kit. Nothing happened. I had 3v going to pin 7, earth at pin 9 and 3v via a 10k resistor on pin 8 which is the pull up to take the unit out of

Hi all I finally got round to typing all my order details into a big spreadsheet and doing some statistics. From time to time I'll update the charts. 1) The number of LPF kits that have been ordered

Reyax UP501 modules work perfect with U1 and U2. ?17 a piece on Ebay. 73 de Andy

Thanks for posting the image Eddie, My signal looks ok, I've never really studied what a wspr signal should look like but mine seems to be able to be decoded on any band. Current status with my U2