Excellent series. I want to build one of these. Although I live in the UK where we have 240 AC mains, don't know if I am brave enough to connect it directly to the mains! I would seriously recommend an isolating transformer for any projects like this. Thanks for the videos and sharing your knowledge. Hopefully, this will encourage some newer hams to try some of these old school projects.
I built one when i was a novice. DANGEROUS but fun. I used a plastic dittle stick on the trimmer and tuned the plate for min red. The base was bent gavonized sheet steel. year 1969
I am guessing that the receiver used to monitor the transmitter is slightly off set and in CW/SSB mode. If the receiver is offset by, say, 700Hz you will hear a 700Hz tone when the transmitter is keyed. Provided the receiver is in CW or SSB mode, it will insert a carrier or beat frequency which is 700Hz above or below the received signal from the transmitter to produce an audible 700Hz tone.
good series.PLUS, you are using my most favorite pump key, a J-37. Unfortunately, I have glass arm, & have had to switch to a keyer, Bencher, that I use in the manual mode. Thanks for some good work. Dick, WB8MHE PS; re; your ARC 5 series, I have & have used all of the xmtrs, & have all versions of the rcvrs, including the broadcast band type. I also have a rcvr that I made new HF & osc coils to tune higher than 9.1 mc. It allows me to tune to about 13 mcs. TNX again.
Need to point out that there is very strict code for wiring in UK and the chances are extremely low that 13 amp socket is reverse wired unless by the most bungling DIY cowboy. If you used a proper electrician, it will be fine. Nevertheless, it's very easy to check with a neon screw driver tester.. Remember that UK 240 vac is NOT 120/0/120v... but full 240 vac...reference earth. Live (brown) IS 240vac ...Earth, the big vertical pin, REALLY IS earth. (Green) The 3rd (blue) is neutral ... the return for the 240 volts and is NOT earth but is dangerously "earthy". Should NEVER be connected to earth. Can't see if your plug drawings are from front or back. The UK 13 amp plug..viewed from the PINS side is:- Left horizontal LIVE. Right Horizontal...NEUTRAL. Bigger Vertical is EARTH. 240 hurts more than 60/0/60 vac. Hope that is useful. Here's a safety trick:= Two disused transformers from old phone chargers, having the same sec. voltage windings can be wired... Mains Primary in..low volts sec to low volts sec: Mains volts Primary out, for a safer supply. It doesn't matter a hoot what voltage the secondaries are, as long as they are the same! If they're both 6.3 volts, you could use some tube needing that heater voltage and dump the 50C volts dropping gubbins, Safer on the board and no heat to dispose of, nor power to waste. 73 G3NBY
sounds like ya might be about half sharp, mate....these look kinda scary, these XMTR's, but would love to see one up close....wonder if 110-120VAC here in the USA would work with this set-up....different tube, maybe...bit less output....love valves....I really do...got my start on valves and crystals radio....built a code practice oscillator in the late 70's....now I'm an Extra Class Ham....my how time flies...
Excellent series. I want to build one of these. Although I live in the UK where we have 240 AC mains, don't know if I am brave enough to connect it directly to the mains! I would seriously recommend an isolating transformer for any projects like this.
Thanks for the videos and sharing your knowledge. Hopefully, this will encourage some newer hams to try some of these old school projects.
Let us pray!
I built one when i was a novice. DANGEROUS but fun. I used a plastic dittle stick on the trimmer and tuned the plate for min red. The base was bent gavonized sheet steel. year 1969
A very tempting project for a novice!
@@MIKROWAVE1 it's a hot key for sure...
Well done!
50c5 getting rare. Had a rig that used two. Driven by a driver/ osc tube. Used to get tubes at FAIR RADIO.SALES© LIma ohio. Or later a Russian source. And ashamedly we snuck "red" tubes in to the frequency division multiplex unit that gave 12 chanels of phone over wire or radio. Tubes are great except they were power hungry. Retired radio operator sgt williams/kv4li
Dunno, still tripping over tubes at hamfests. I think they made enough for a while longer!
Good circuit 50C5
why is there a tone with signal without modulation instead of making the radio silent?
I am guessing that the receiver used to monitor the transmitter is slightly off set and in CW/SSB mode. If the receiver is offset by, say, 700Hz you will hear a 700Hz tone when the transmitter is keyed. Provided the receiver is in CW or SSB mode, it will insert a carrier or beat frequency which is 700Hz above or below the received signal from the transmitter to produce an audible 700Hz tone.
@@Steve-GM0HUU And sometimes I cheat on some of the videos using a separate receivver as a kind of code monitor!
You could try brass nails/tacks to make soldering easier
Yes! Brass Brads Bring Brazing Beauty!
At 3:18, in the USA, it would be Black (HOT), White (Neutral), Green (Ground). At 16:18, it's C5 & C6
Simply Shocking Pi!
Very nice jobs, awesome!!!! 73 !!! Fred EA5HNM
good series.PLUS, you are using my most favorite pump key, a J-37. Unfortunately, I have glass arm, & have had to switch to a keyer, Bencher, that I use in the manual mode.
Thanks for some good work.
Dick, WB8MHE
PS; re; your ARC 5 series, I have & have used all of the xmtrs, & have all versions of the rcvrs, including the broadcast band type. I also have a rcvr that I made new HF & osc coils to tune higher than 9.1 mc. It allows me to tune to about 13 mcs.
TNX again.
Awesome! Those ARC-5s were the gateway drug for many of us!
I use a mfj keyer to keep all the voltage of my hand kg6mn
Need to point out that there is very strict code for wiring in UK and the chances are extremely low that 13 amp socket is reverse wired unless by the most bungling DIY cowboy. If you used a proper electrician, it will be fine.
Nevertheless, it's very easy to check with a neon screw driver tester..
Remember that UK 240 vac is NOT 120/0/120v... but full 240 vac...reference earth.
Live (brown) IS 240vac ...Earth, the big vertical pin, REALLY IS earth. (Green)
The 3rd (blue) is neutral ... the return for the 240 volts and is NOT earth but is dangerously "earthy".
Should NEVER be connected to earth.
Can't see if your plug drawings are from front or back.
The UK 13 amp plug..viewed from the PINS side is:-
Left horizontal LIVE. Right Horizontal...NEUTRAL.
Bigger Vertical is EARTH.
240 hurts more than 60/0/60 vac.
Hope that is useful.
Here's a safety trick:=
Two disused transformers from old phone chargers, having the same sec. voltage windings can be wired...
Mains Primary in..low volts sec to low volts sec: Mains volts Primary out, for a safer supply. It doesn't matter a hoot what voltage the secondaries are, as long as they are the same!
If they're both 6.3 volts, you could use some tube needing that heater voltage and dump the 50C volts dropping gubbins, Safer on the board and no heat to dispose of, nor power to waste.
73 G3NBY
sounds like ya might be about half sharp, mate....these look kinda scary, these XMTR's, but would love to see one up close....wonder if 110-120VAC here in the USA would work with this set-up....different tube, maybe...bit less output....love valves....I really do...got my start on valves and crystals radio....built a code practice oscillator in the late 70's....now I'm an Extra Class Ham....my how time flies...
@@cooker4409 The original Transmitter was for the US mains at 117 VAC. foxtango.org/Files/BareEssentials-W5LET.pdf