Spy Receiver

[@MrBugsier5]

Great set Helge!! amazing stability and gain! wow! 73,s PD8533

[@AshleyWeech]

Excellent work and creative thought! Thank you for sharing! From the USA

[@LA6NCA]

Thank you.

[@harismartin5523]

Beautiful project,good channel,more projects please.

[@RadioProyectos]

What a wonder, what a great little receiver. Congratulations on the design. 73 de EA1FLL 😊

[@edbeckerich3737]

Helge, fantastic build!! Very well done, I cannot build that small!! And I'm stuck on transistors, so great respect from me Ed KC8SBV

[@sophoklesgreek3237]

I am baffeld .. Helge.. you have out done yourself with this one ... O___O really, really nicely done!

[@sincerelyyours7538]

Amazing! You make it look so simple but I know it isn't. Your ability to design radio circuits as you build them is most impressive and inspirational. Thanks and 73, de JS2OLO

[@LA6NCA]

Thanks for the nice comments. I have found that it is not always best to follow finished drawings when building a radio. You should often test slightly different values. Preferably with potentiometers before switching the fixed resistors. Or you can try completely new solutions.

[@movecizetodobryfilm]

You are Master of tube radio, transmitters and receivers, so this place is You Tube are a new meaning! 73

[@LA6NCA]

Thanks, I hadn't thought of that. Funny.

[@jamesttk488]

Extremely interesting and exciting to operate homebrew 1.5W transmitter and receiver and all with tubes. 2 thumbs up!.... VA7VB

[@savvycreativeadventurer]

Absolutely wonderful! Love seeing the passion and excitement!

[@LA6NCA]

Thanks for the nice comment.

[@joeblow8593]

Nice work Helge! Works great.

[@jerryshore8374]

Thanks for the projects Heige. Fun to watch. I am supposed to get a SP600jx17 receiver today. From your other videos it seems to me the Germans had more awareness of radio users needs than US in their WW2 radios. I think these videos will provide less fear of using tubes in projects. Ham world has been mostly transistor focused sine the 1970s. I see few home builders of ham gear. Parts are less common at hamfests. Thanks again for the videos. Jerry

[@LA6NCA]

Yes you are right. The Germans had a great focus on making user-friendly radios. Both use and service.

[@SebastianStetter]

Very nice! Truly inspiring project. Thank you for sharing. 73 from Germany.

[@LA6NCA]

Thank you.

[@alexpinkerton7459]

Those are just lovely. Seriously...

[@Derrick6162]

Nice project. Enjoyed, Thanks for sharing...

[@thomthumbe]

Helge, this is a very good video! Your electronics knowledge is super, and the video you put on KZbin is also very good quality! I am wondering if you could build a small voltage multiplier, or some kind of vibrator power supply. This way you could operate from a 12 volt battery. The tube filaments could be powered from the 12 VDC (and a dropping resistor, as needed) and the high voltage for B+ power from a voltage multiplier. In any case, your TX and RX projects are SUPERB! Tks es 73!

[@LA6NCA]

Yes, I already made it. Here is the power I used in the video. However, I will also design a small power. I always use 12 volt heating in the projects. www.la6nca.net/homebrew/pow_tube/index.htm

[@althepal6818]

With the nicely colored components it is like a candy box!

[@SeAfasia]

GE es GM Helge nice schematic prezentantion also the constraction inside small box...tks for posts 73

[@mohinderkaur6671]

Great work! the 6ak6 can be used as a transmitter too, just add crystal and tank circuit. Full transceiver

[@LA6NCA]

Thank you for your comment. Yes, I have already made the prototype of a tranceiver. Hoping to get it in the same type of box.

[@mohinderkaur6671]

@@LA6NCA RF amp can be reflexed as AF amp. 6AK6 becomes transmitter.

[@huawei97google55]

Это великолепно 👍. Ничто не сближает тебя с эфиром так хорошо, как вакуумные трубки. 👍 Браво , маэстро. ✌️

[@ms-dm5hp]

Great inspiration to find ham radio hobby basis, thank you

[@LA6NCA]

Thanks.

[@edd2241]

Good video, very interesting 👍👍

[@achimbuchweisel2736]

cute little box!

[@Sys-Edit0r-1995]

Man this would be cool with a T/R relay and AF amp also in tins! Now I want to build some! For me, to go with the metal/glass aesthetic I'd use some vintage RCA phono plugs (tinned coper and phenolic insulators) and with RG-316 coax

[@LA6NCA]

So nice that you are inspired by my videos. 73

[@greengrayradio1394]

Nice! I wonder why you used the 6AK6 as a detector (small output tube)? Did it perform best? A small slow motion drive on the tuning cap would make tuning easier

[@LA6NCA]

I tested several tubes and found the 6AK6 good. Got a sensitivity of 1uV. Heating volts is 12 Volts, so I had to have a resistor in series with the tube. 6AK6 has only 150 mA heating current. Yes, the tuning cap was not optimal. I had too large a frequency range. By reducing this, I could get an easier adjustment of the frequency.

[@gamlemann53]

Awsome Helge the best from LB1NH 🙂

[@diegogarciamedina6363]

Hi, why a 10pF capacitor between grid and cathode of Audio Detector 6AK6? thanks

[@electrifyingvids3545]

"Its job is to take up additional charge originating from the Miller capacitance." -Some online resources.

[@alvinp.schmitt5424]

where did you get all the altoid boxes?

[@LA6NCA]

I have received boxes of equipment from a dead radio amateur. They were among these. How to find such, I am not sure.

[@Steve-GM0HUU]

👍Well done Helge. Amazing that you fitted all that into the small tin. I would use a larger box😂. I wonder why the RX stopped when you closed the lid? I wonder if it was capacitance? Some of the components being very close to RF ground with the lid closed? Did the glass fibre panel change the capacitance and fix the problem?

[@LA6NCA]

Thank you. When I closed the lid the coils changed their value. To prevent this, I removed the metal above the coils.

[@MrBugsier5]

Now build a trancyver, Multyband in one bigger box! 😁

[@LA6NCA]

Thank you for your comment. Yes, I have already made the prototype of a transceiver. Hoping to get it in the same type of box.

[@hansibull]

Dette var skikkelig imponerende! Å få plass til at dette er godt gjort. Nå trengs bare en høyspenningsgenerator slik at sender og mottaker kan drives fra et 12V batteri!

[@LA6NCA]

Yes, I already made it. Here is the power I used in the video. However, I will also design a small power. www.la6nca.net/homebrew/pow_tube/index.htm

[@박진환-v8b]

awesome skill

[@alvinp.schmitt5424]

I do not speeak german but was able to understand what you said with the comments. MAN YOU ARE CRAZY! having to redo everything when the tubes (valves?) in wrong position blew my mind. please accept Jesus.

[@Dromidont]

👍👍👍👍👍

[@larspregge6420]

Kewl.

[@fo4mm209]

great project, 73 de FO4MM !