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.
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.
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
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'd like to see an original Marconi radio transceiver. For audio reproduction, I'm a big class H amplifier fan.. Especially for high-watt output, the finer class H amplifiers are hard to beat for audio reproduction.. Tube amplification has excellent bass but soon as you start to clime the frequency response it kinda poops out after 5-10Khz. Even on the bass end below 80-Hz. they fade..
Using a tube amplifier nowadays for high-fidelity music reproduction is like wearing a pair of sunglasses to view art at an art gallery.. I can see old transceivers being collected for use with a final tube-powered output for nostalgia reasons, for sure but NOT for up-to-date music reproduction...How about the original Marconi radio setup for ocean liners like the Titanic and some land-based stations.. Marconi actually had his own school set up for his students to become certified in using his radio equipment as an operator.. Luckily the radio operator took it into his own hands on the Titanic to fix his Marconi transceiver before the ship started sinking.. Back then as an operator, you were not allowed to fix a broken Marconi radio unit until you got in touch with a certified Marconi technician..
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/
@@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'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! :)
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.
Thanks Mike for the BK contact !! W8PU
Thanks Gary. See you on the next one; the Bruce Kelly in January.
Your signal report is 596. Slight indication of an A.C. hum. Very nicely done, it looks beautiful.
Whoop Whooop!
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.
Good luck in the contest. Thank you for showing us what you are building.
Thanks for posting...amazing retro design...
Building replicas is as much fun as taming them.
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.
You are competent and kind.
Your Power Hartley looks amazing. Thank you for showing us.
73 es 55 de Bernd
Thanks for watching!
Nice rig Mike!👍 Good explanation
These things are great to haul out once a year.
Brilliant.
73 de M0KOV
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 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
I'd like to see an original Marconi radio transceiver. For audio reproduction, I'm a big class H amplifier fan.. Especially for high-watt output, the finer class H amplifiers are hard to beat for audio reproduction.. Tube amplification has excellent bass but soon as you start to clime the frequency response it kinda poops out after 5-10Khz. Even on the bass end below 80-Hz. they fade..
Using a tube amplifier nowadays for high-fidelity music reproduction is like wearing a pair of sunglasses to view art at an art gallery.. I can see old transceivers being collected for use with a final tube-powered output for nostalgia reasons, for sure but NOT for up-to-date music reproduction...How about the original Marconi radio setup for ocean liners like the Titanic and some land-based stations.. Marconi actually had his own school set up for his students to become certified in using his radio equipment as an operator.. Luckily the radio operator took it into his own hands on the Titanic to fix his Marconi transceiver before the ship started sinking.. Back then as an operator, you were not allowed to fix a broken Marconi radio unit until you got in touch with a certified Marconi technician..
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 love it good
I must have missed where you sourced the B+.
An unregulated HV Power supply.
👍Kollector...!
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!
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
what about a CW transmitter using a Forced Air Cooled 4CX5000A
As the driver?
Possibly might be too powerful
I like the Russian tubes. With Chinese tubes sometimes my tube shields won’t fit over the tube
Надо сделать на лампе ГУ81
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