Pete, Bill:
Applied power to the 6C4 / 5763 transmitter for the first time today. I made RF. No smoke was released to the wild. Only issue is the load air variable cap is fully meshed at full capacitance and still not getting the dip on it. Need to root in the junque box for a 220 or 330pF silver mica and wire that in across the load cap.
As it is its putting out 2w. Listening on a general coverage receiver I'm not hearing any chirp or drift. Will build a low pass filter and have to interface in the power supply. Still have a few details to do such as labeling the controls but for the most part I just built a transmitter from scratch. Happy day at the workbench.
Another fix is to redo the coax from the RX / TX switch. Didn't have any RG174 so I just grabbed a clipping of RG8X had laying around. Ugly but got the job done.
Thanks for all the help and encouragement.
Till later
Hank Ellis K5HDE
Our book: "SolderSmoke -- Global Adventures in Wireless Electronics" http://soldersmoke.com/book.htmOur coffee mugs, T-Shirts, bumper stickers: http://www.cafepress.com/SolderSmokeOur Book Store: http://astore.amazon.com/contracross-20
Name that ham! Here are his comments:
This is vintage early 1960’s and my call sign at that time was K3???. One of my favorite rigs was the Johnson Adventurer which I built and had a 6AG7 driving an 807 –50 watts input. On the top shelf near the lamp is the screen grid modulator for the Adventurer. I was in tall clover.
On the bottom opening is a 40M CW transceiver I built – it had a 6CX8 MOPA—about 5 watts. The RX was a two tube regen.
Our book: "SolderSmoke -- Global Adventures in Wireless Electronics" http://soldersmoke.com/book.htmOur coffee mugs, T-Shirts, bumper stickers: http://www.cafepress.com/SolderSmokeOur Book Store: http://astore.amazon.com/contracross-20
This is what all the cool homebrewers will be wearing next year. Just be careful at airport security -- they might not understand!
Check it out: http://www.johngineer.com/blog/?p=1595
We received some comments from some noted Thermatron authorities:
Hi Guys,
This will cause all of the bells, whistles and sirens to go off all it once.
Now all that is needed is a logo on the watch that says
EBOLA ( Electronic Bi-state Operational Long Arithmetic) and this will cause you to go to jail without passing Go or collecting $200.
Pete
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Wow, I love this thing!…even though it uses little black plastic things to work. Have no idea what they are. (johngineer has knack squared)
Reminds me of a project I am trying with fellow ham. We picked up an old HP nixie tube freq counter at junk yard. We were going to strip out the nixie tubes to make a clock, but decided we could make it as clock as is. Want to program an Arduino thing into generating a frequency that is the time and feeding it into the counter.
For example 3:45:25 would be 34,525 Hz.
But my Italian is terrible so haven’t been able to get the Arduino to work. Just learning it. Project a bit over my head. picked up one of those online language courses on Italian. Hard, but not as hard as Turkish!
Grayson
TA2ZGE - Ankara, Turkey
KJ7UM
Follow the Hollow-State Design Blog
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I'm wondering if I could do it Manhattan style, with discrete components...
Our book: "SolderSmoke -- Global Adventures in Wireless Electronics" http://soldersmoke.com/book.htmOur coffee mugs, T-Shirts, bumper stickers: http://www.cafepress.com/SolderSmokeOur Book Store: http://astore.amazon.com/contracross-20
You know that you are dealing with a broad range of technology when you find yourself discussing how to power an Arduino microcontroller from the 12V AC voltage on a vacuum tube filament line. Thanks Pete.
Hi Bill,
There is only so much that can be said in 1 hour and 19 minutes so maybe here is some stuff for the blog.
The 1st thing on the list when working with the Arduino when it is not connected to the computer is to have a proper power supply. My research as indicated that 9 VDC “raw” is a good starting point to power the Arduino boards so here are two supplies that will provide that power.
I did find that it was necessary to have an isolated supply when working with the “toob” radios and even to isolate the RF into the radio using a ferrite core transformer –some more tribal knowledge.
One supply takes an 8 VDC regulator and boosts its output to 9 VDC. The second uses a switching regulator and the beauty of the second is that the input can be either 12 V AC or DC. This is ideal for use in toob radios where you can sample the 12.6 VAC filament string.
73’s
Pete
Our book: "SolderSmoke -- Global Adventures in Wireless Electronics" http://soldersmoke.com/book.htmOur coffee mugs, T-Shirts, bumper stickers: http://www.cafepress.com/SolderSmokeOur Book Store: http://astore.amazon.com/contracross-20
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