Calling "CQ" ..... The Knole DC 40m Receiver Kit Build

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raynerd:
I ordered the Knole DC RX a couple of week back from http://www.users.globalnet.co.uk/~walfor/simple.htm
The kit arrived within a day of ordering and then it sat on my work bench for some time while I plucked up the courage to take the soldering iron to it.

So many holes, so many components and so little radio knowledge!

Instructions are incredible, lots of detail and nice preamble just to set the scene for the build. PCB has no silk screen and this was a little daunting at first but the excellent instructions and component layout diagrams makes up for this.

First step was to setup the mechanical parts on the front panel.

Then tack solder the panels together. This was much harder than I expected and it didn`t look as clean as I was hoping at the end, but pretty solid and secure.

First step was to setup the voltage regulating part of the circuit and turn it all on and check voltages:

Then onto the output stage:

And finger/screwdriver buzz test:

Finger buzz test worked fine and voltages the same so it was OK to continue to the VFO and toroid winding!

and that is where I am up to so far. I haven`t got a frequency counter so I`m now a little stuck trying to tune in the VFO. Apparently for the 40m that I am trying to set this up for require a VFO freq count of between 5.0 - 4.8 MHz. I have just managed to get hold of a yupiteru mvt-7100 scanner and I can apparently use this instead of a counter....I just need to figure out how!

SKIPRAT:
Hi There

I was somewhat amused by the title of your post but nevermind you can probably guess from my signature that i practice in the black art of amateur radio. A 40 metre receiver interesting does that mean you have interest in getting liecenced or have you got one already . I used to do a bit of radio gear and electronic constuction a few years ago then the backyard engineering bug bit me i am still active on the 145 Mhz band and the 430 band and can be heard calling "CQ CQ CQ G6FOW " and hopefully getting replies anyhow have fun with radio .

Chers Paul

Bluechip:
Chris

Nice one. Occasionally think about having a go myself again ... last one I made was a Maplin Regen Kit about 15 Yrs ago. Worked rather better than I expected :beer: No end of fun fooling about with home-brew coils to find out where it could go...

'Course, as an old codger, I would rather you built a REAL set .... :D :D

http://theradioboard.com/rb/viewtopic.php?t=2552

Dave BC

EDIT Actually, thinking about it, it must have been about 20 yrs. ago, been in this house 16, and it wern't here ..

zeroaxe:

--- Quote from: craynerd on March 31, 2010, 04:33:45 PM ---I ordered the Knole DC RX a couple of week back from http://www.users.globalnet.co.uk/~walfor/simple.htm

--- End quote ---

Completely off topic.... But imagine my surprise when I saw your link!? :bugeye: Cant believe Global(inter)net is still running!!!! Back then when I worked for Tech Support, they got bought out by an American Company called "NextLink/Concentric" and then again later by "XO Communications"..... That was also the time when Freenetname got launched and shortly after "Waitrose Internet"........... :bugeye: I am still shocked that the free webspace is still up and running :)

75Plus:
Chris, You need a little more heat to join those two boards. An 80 to 100 watt iron, just slid along the joint, should make it much stronger.

Using the scanner to determine the frequency is known as "Zero Beating". As you approach the set frequency you will hear a whistle which disappears when you are dead on and starts up again as you tune past it.

You may also be able pick up the US time signal station WWV. It is at exactly 5.0 MHZ and can be copied worldwide during the evenings when the bands stretch out.

Joe (n0fnf)

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