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Latest Topics

Topic Created Posts Views Last Activity
Analog Atomic Wall Clock With Silent Second Hand No Battery May 19th, 19:35 2 46 3 days, 9 hours ago
Linked Routers Jan 8th, 00:13 2 209 on 4/3/15
Cross Band Balloon/Kite May 20th 2014, 22:08 1 411 on 10/6/14
mast mounted bi-amp Jun 10th 2013, 23:17 3 668 on 18/6/13

Latest Posts

Topic Author Posted On
Analog Atomic Wall Clock With Silent Second Hand No Battery WD6EJN 4 days, 7 hours ago
For many years now I have been trying to find a large (14") atomic wall clock which doesn't use an aa battery.
I also don't like the noise (it reminds me of grade school!! come on 3:30) the second hand makes.
I would really like one that uses gps to lock as I am not allowed to have antennas in this tiny apartment and wwv is very hard to hear most of the time.
To save money it would be fun to find a kit which uses an atomic or gps receiver to correct the time, just a huge clock drive would be enough.
I once had a search engine return a company that makes makes atomic street clocks ! with a roman numeral face,,,,I can't believe that I even found this.
Is there some reason these are blocked from the web?
Linked Routers WD6EJN on 8/1/15
I'm sorry I can't remember the exact name of the system, relating to a Linksys router being used for video and connection of remote ham gear.
I will look up the article as I don't hav e time now.
I just need to know the connector used on the back of the router.
I would like to get started on this and have to start somewhere.
I ordered sma male connectors and these were not it.
They resemble miniature n-connectors on the small antennas and box.
I will search for the article now.
Although the project is not easily available in the qst magazine and there are no details, I believe I have the antennas necessary for this.

"The reason for the odd connectors is that the FCC decided to
"discourage" users from attaching external antennas and demanded that
manufacturers use weird and proprietary connectors."

Cross Band Balloon/Kite WD6EJN on 20/5/14
I have been working on this for at least a year! (it's embarrassing to say how long no money) and finally getting closer to completion.
I spent a month or so just ordering parts (Ramsey E vox kit) and customizing a box to add a vox to my Alinco credit card radio which does not have vox, it was not easy just to match the vox circuit to the Alinco and have it (ramsey kits are quite large by todays standards) fit in the custom box.
I have no money to buy new Woushoun/Baufang radios which are probably equipped for electronic switching rather then vox.
Now my HTX-202 does not have vox either or electronic switching so I have to customize another vox circuit.
How does one energize the the uplink without having to use vox?
It looks like I have to customize a whole nother vox circuit.
This will take forever.
mast mounted bi-amp WD6EJN on 18/6/13
Oh I know I should have thought of some of the collector to emitter circuits I built (following instructions!) using so many turns and studied the plate b+ circuits in ham school many years ago, but had to post this to remember!
Now I have another issue...I'm using a coax balun at the ham rig and it shows a shunt, I am hesitant to use capacitor blocking.

I think about if I just had the bi-amp picking up the rf much like a high impedance test probe, I could transmit enough energy at the shack to power the circuit, of course I would have to run some power to charge a battery defeating the purpose of running high current dc in the first place.
Actually I don't really need extra power for transmit even if the loss is so great that it becomes almost a part 15 device! it's more about the receive amp, although with twin lead, the reasons for using coax and cutting down on harmonics makes using antenna mounted amp a must.
mast mounted bi-amp WD6EJN on 10/6/13
I am having my antenna a great distance from my ham rig as I have posted many times on this site (kite in tree).
I will be mast mounting the bi-amp some distance from my ham rig and using 300ohm #22 gauge open wire feeder for stealth (white wire appears as kite string!)
I need to find the values of chokes to power the circuit and estimate it will draw about 4 or 5 amps.
Just by common sense I would pick the highest inductance depending on the lowest frequency hopefully 10-80 mhz and the gauge of wire wound would be approximately 16 gauge, weight is critical.
How is this going to effect the impedance of the open wire? which seems to be almost impossible to find sometimes (tap).
I'm afraid the chokes will simply raise the impedance too high or act as load and drop to short.

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