He did a great job at balancing the retro look with practical components - at the price of some some performance limits, as we will see in the next video.
This was an interesting since I had never looked at the one tube transceiver circuits. The transistors in the schematic with the step-up supply will degrade over time due to McDonald effect from the reverse base-emitter bias on the off transistor.
Should that Solid State high voltage generator not have had a feedback winding and just one 10K resistor not 2 10K resistors and a 50Pf capacitor across the two collectors of the transistors to get a nice clean signe wave instead of a raspy sound square wave.
@@tripplefives1402 Thanks for the information, I appreciate it. As my handle suggests, I'm in the UK where the voltage is 230v but I take the principle for what you say. A varaic is a good option and is on my shopping list. Thanks again and best 73, G0ACE
Very nice 2 tube transceiver with vintage tubes, etc.. Why did he not use the 250 vdc source divided by 2 resistors for the regen tube? That way you would not need a 9v battery and it could all be powered by one 12vdc power source.
@@jennyjansen754 Folks are experimenting with ordinary small power transformers. For instance a 120VAC to 6.3 VAC 1 Amp job has a 19:1 voltage ratio which squares to a 362:1 Impedance transformer. So if you had a tube with 4500 Ohms of plate impedance, the output impedance would be 12 Ohms to drive ear buds.
I used to live in La Junta Colorado, I was amazed at the broadcast am radio I would receive.
Nice lower noise environment for AM!
@@MIKROWAVE1 you hit the nail on the head kind sir, definitely little to mechanical whine simply because there was little electrical interference.
Nice appearance! I love the combination of wood base and legacy vacuum tube components!
He did a great job at balancing the retro look with practical components - at the price of some some performance limits, as we will see in the next video.
Very good Performance mister😂❤
It works but you do have to be patient.
Nice gear Bro, RF its one of best part this cience called Eletronic.
Like from Brazil 👏👏👏...
Obrigado por assistir meus vídeos de rádio.
Very cool!!
We shall see how cool soon!
Very cool! I think I will attempt this project - DE K1TB
This will be a great project. Start collecting parts!
This was an interesting since I had never looked at the one tube transceiver circuits.
The transistors in the schematic with the step-up supply will degrade over time due to McDonald effect from the reverse base-emitter bias on the off transistor.
That is quite a primitive circuit, and I will take a closer look when we get there with the series.
For home-grown product, design is fairly sober
Great as usual. ❤ Is your tuning knob old stock or did you found a place to buy it this time?
I do not know how Dwight supplies these rigs with that Vintage Hardware. It seems unbelievable that he has access to such stock in quantity.
Should that Solid State high voltage generator not have had a feedback winding and just one 10K resistor not 2 10K resistors and a 50Pf capacitor across the two collectors of the transistors to get a nice clean signe wave instead of a raspy sound square wave.
Interesting and thanks for showing it to us. Is the 250V DC supply easily found today please?
@@tripplefives1402 Thanks for the information, I appreciate it. As my handle suggests, I'm in the UK where the voltage is 230v but I take the principle for what you say. A varaic is a good option and is on my shopping list. Thanks again and best 73, G0ACE
The unit has onboard 250V that is converted up from 12V. So the unit only requires 12V and, of course, a 9V battery.
@@MIKROWAVE1 Thanks for the information Mike. That clears things for me.
❤
Very nice 2 tube transceiver with vintage tubes, etc.. Why did he not use the 250 vdc source divided by 2 resistors for the regen tube? That way you would not need a 9v battery and it could all be powered by one 12vdc power source.
There are many ways, but component count, perhaps by the time you clean it up enough? We shall see.
Was it Shango066 if not who?
Do you have a link for order info? Do we just contact Ike at his QTH mailing address?
He seems to have an EBay and Esty store, but yes, email for queries.
Anyone built this unit into an Altoids Tin using Pencil stub vacuum tubes.
I have a few of these. My buddy keep stealing them for fuzzboxes.
@@MIKROWAVE1 There are Russian Germanium Transistors that should work also.
I've never been the first viewer. No big deal at all. Good grief, 200 - 500 Volts in a set of headphones ???
Ha the good old first days of radio.
I guess using an audio transformer would be cheating.
@@jennyjansen754 Folks are experimenting with ordinary small power transformers. For instance a 120VAC to 6.3 VAC 1 Amp job has a 19:1 voltage ratio which squares to a 362:1 Impedance transformer. So if you had a tube with 4500 Ohms of plate impedance, the output impedance would be 12 Ohms to drive ear buds.