VK Logger Ham Radio Forum Archive

All good points ! I dont know the CMA38400 - can you point me at some info ? A quick search on Ebay turned up nothing but colourful phone cases :wtf: and googling turned up some references in issue 207 of the French Microwave Mag Hyper but no hard data or where one might acquire such a device. than...

Its dam expensive though Tim. Looks like somewhere around $390+NZ :crazy: Roger Don't forget the output level is quite low so you need a wideband power amp as well, plus don't forget FR4 PCB will present significant challenges at that frequency. The BOM starts to look expensive :o This chip may be ...

Nice work Looks good guys. Are you going to run the same ant. down this way or just more power. I haven't seen the beacon on JT4 for a while now but then again Im not listening as much as I was. You need to get WSPR running on it :wink: :wink: Hi Roger The master plan for the other 2 antennas, once...

I cannot think of anyone more deserving. Well done Doug

Panel #1 Dual panel Antenna Rigol DSA815TG

More Pictures:

Reference Antenna Range:
Mark Adjusting the height:

Mark ZL2WHO has been busy building a more 23cm panel antennas for the Waipuna Ridge beacon site (ZL2WHO/b) specifically to point towards VK-Land. Based on a nice opening in October 2015 we know propagation can happen, so it just made sense to fire some RF in the VK2/VK4 direction. The original desig...

Here is a nice project idea if you are looking for inspiration:

http://hackaday.com/2016/01/26/its-a-bi ... ore-187639

73,
Wayne

Hi Kevin, The best thing to do is connect a RS232 terminal to the unit and query what is going on. I believe the command is: :system:diag:log:read:all? and :system:status? Some of the HP units (not sure which one, there are many GPSDO models) have issues with the GPS date. The underlying issue is th...

Wayne It is probably more than the cost of the radio but I highly recommend investing in an ultrasonic cleaner. I've had one for a few years and it has payed for itself several times over. There are plenty to choose from in Aliexpress - I recommend an all stainless model. For a cleaning agent I norm...

Hi Simon, I just checked mine, and it turns out I use the same stacking configuration, but both my 12V and 24V ones are reverse polarity to your standard }:[ . Murphy's Law in action. So, we are not allowed to operate at the same field-day site - we can only compete against each other :lol: image1.J...

Does anyone know where you can buy replacement centre pins for type N connectors? I have some that have no pins or have crimped pins that cannot be re-used. 73 Wayne VK4WDM Try rfsupplier.com (details on contact page). Some time ago they gave me a price for crimp rings and extra dust caps for N con...

Dave, Great work on the repair job. As you have discovered the Trimble OCXO is a nice unit - the only downside is the current draw is quite high (1.9A) at startup which is very high compared to other surplus models from China. It does settle down to ~0.25A after a few minutes so it wont tax the batt...

Successful operation of USB requires a good reliable power source. Often there is insufficient power budget left for USB peripheral operation and wall adapter ratings are questionable. I recommend you try a good power adapter capable of 2A to see if that solves your issue. The apple iPad adapter is ...

This is very sad indeed.

He was undoubtedly the most active ZL'er on 2m SSB and EME and he will surely be missed.

RIP Harry.

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Wayne ZL2BKC

entire house uses Philips LED lamps and there is no trace of interference at all. cheers all The Phillps ones are good, at least the ones that I have tested. Several months ago I setup a LISN and measured a number of GU10 lights. Screen shots were taken and if anyone is interested Im happy to post ...

Hi, the standing current is a lot higher that I had expected, was hopeful of a power efficient P.A for the 23cm beacon I am building but with 4amps all the of the key up time, is quite a current draw for idle over 24Hours ( I want to have the beacon run as a low duty cycle system if possible ) has ...

Thanks for treading this I have just completed assembly of a Minikits 23cms amplifier using the Mitsibushi RA18H1213G module which is supposed to produce about 20 watts PEP on 1296MHz Kevin, This is perfectly acceptable for the RA18H1213 power block. I have built several before and generally I like...

Also interested to know from Len VK4ALA some info on the 1296 feed in the gridpack shown in his earlier posting above I use a similar gridpack on 2.4 with its original WiFi (?dipole) feed with good results Kevin VK4UH I have the same gridpack antenna and would also be interested in more info on how...

Not quite the correct orientation, but I got these from the sale bin at Bunnings earlier in the year (after Christmas I guess...) Should be ok for a horizontal run if you push them under the tile. Not sure about a vertical run. ImageUploadedByTapatalk1444642571.618974.jpg Given the size of the Xmas ...