Old Time Transmitter Contest - Part 1
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- Опубликовано: 19 ноя 2021
- The Bruce Kelly 1929 QSO Party is a two weekend CW contest using homebrew Retro Design Transmitters from the 1920s. Take a look at this Type 211 Tube Hartley Oscillator for 160 Meters.
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Fantastic Mike and has to be one of the finest examples of homebrew vintage Hartley oscillator transmitters. It really looks the part with that 211 tube and the chunky variable capacitor. I've just completed a vintage 807 breadboard CW transmitter with HV power supply which was great fun to build. A very inspiring video. Keep up the good work. 73...M0DAD from North East England.
Good luck in the contest. Thank you for showing us what you are building.
A great video as always and thanks for introducing me to the world of competitive vintage radios. I have a friend who races vintage (pre 1930) racing cars but I never knew there was an amateur radio equivalent.
This contest and the Linc Cundall which is in January are great fun events.
Thanks for posting...amazing retro design...
Building replicas is as much fun as taming them.
Your signal report is 596. Slight indication of an A.C. hum. Very nicely done, it looks beautiful.
Whoop Whooop!
You are competent and kind.
Thanks Mike for the BK contact !! W8PU
Thanks Gary. See you on the next one; the Bruce Kelly in January.
Nice rig Mike!👍 Good explanation
These things are great to haul out once a year.
I love it good
Its that time of year again and I don't have my 1929 transmitter yet. I need to build one!
Oh yes - session 2 starts Saturday night.
Your Power Hartley looks amazing. Thank you for showing us.
73 es 55 de Bernd
Thanks for watching!
Brilliant.
73 de M0KOV
👍Kollector...!
After having done your nutube radio and your 12au7 regen with a 6u10 tube. It’s finally time to transmit. I want to use authentic parts where could I source them? This transmitter is beautiful and will look lovely in the radio pile
I noticed the ARRL hand book on the table in there there is a 2m transciever which has a super regenerative RX a 6C4 and is made to become a M O PA on transmit I built it many years ago but very bad drift and modulated with a carbon mike had two QSO with it
Those double duty superregens/TX in the Handbooks were legal on 6 and 2M then, but eventually on UHF only.
I will be on soon with a single 6L6 on 40 meters. Dave N9HF
David, the Linc Cundall old time contest celebrates rigs like yours and it is coming right up soon in January.www.antiquewireless.org/homepage/lc-cw-contest-details/
Thank you great demo. i was looking on ebay for a 210 tube but the price is way way too much
Type 27 is a very cheap eligible tube. Good for at least a couple watts.
I have bought wirewound ceramic resistors. Solar capacitors. Using 600v .7 ma I’m not sure if I’m getting an output or not. What are common troubleshooting I could do for this circuit
I tied the variable capacitor to ground unnecessarily I will fire it up for the qso party tomorrow
RST is 5-9-1. Early spread spectrum, lol.
OUCH. THe sidelobes related to 60 Hz form a decaying series that represent something wider than CW! But still much narrower than AM.
@@MIKROWAVE1 True and perhaps even handily readable without a BFO, which I remember as being a luxury in the early days. My apologies, no insult was intended. 73
I must have missed where you sourced the B+.
An unregulated HV Power supply.
Mike what was the final voltage you used on the plate?
400V Key down. 550V Key up!
10K and 550 volts on the circuit is more than 30 watts
Yes but you have not factored the droop in my awful supply. Its over 150V!
I like the Russian tubes. With Chinese tubes sometimes my tube shields won’t fit over the tube
Надо сделать на лампе ГУ81
what about a CW transmitter using a Forced Air Cooled 4CX5000A
As the driver?
Possibly might be too powerful
Lets get my spark gap out off the closet.. lol
Alas the old king spark is explicitly banned.
599? Ha! 595 at best.
I'm guessing nobody cares about harmonics and splatter. Is the FCC requirement for harmonic suppression and unrelated frequency radiation not in effect for these transmitters? HEY, let's make a nice spark transmitter! :)
See Part 2