Handbook Novice Transmitter Part 2

Let's get this Transmitter fixed up and ready for action! Quite a few folks have been tagging in saying that they built this transmitter and some of you still have one. Resurrecting Radio Handbook builds is a fun practice and bonus - somebody else drilled the holes.

[@akdenyer]

Hi Mike, Thanks for the quick QSO. I did want a report but you had to go. The antenna is a 40m loaded dipole resting on the deck at about 12' so I was amazed to get a reply. I am pretty rusty and need to do some more practice sending. But i mainly only do CW. VE9MLG

[@MIKROWAVE1]

Work call at exactly the wrong time! You were easily 589 as you will hear in Part 3!

[@bayoutrapper]

Man I love your videos, and learn a lot from them. I'm working on my technician license, now. Thanks for all your work, and help. God bless.

[@MIKROWAVE1]

Thanks for watching!

[@PapasDino]

Ahh, the memories! Nice work as usual Mike. BTW, Bill N2CQR really liked your use of Never-Dull (great stuff); he also loves your VFO series. 73 - Dino KLØS

[@mauricewilkes826]

Yet another great video Mike and I look forward to the next part. Thanks and 73

[@KG5IF]

Mike, thank you for these videos.. Many new hams have never seen or used a tube rcvr or xmtr. The information on the safety caps was interesting I didnt know that thank you... Enjoyed your video.. Rich KG5IF

[@KB4QAA]

Very suitable for what it was intended for. Nice to see a transmitter that didn't require major rework or reverse engineering.

[@MIKROWAVE1]

This is a pretty solid and thrifty design, and with FT-243 crystals, it provided a good novice entry rig.

[@Chris_Grossman]

You used the infamous Chengx capacitors! They are inexpensive. I look forward to the crystal current discussion, that is a subject I know very little about.

[@MIKROWAVE1]

Part 3 is up. Are Chengx capacitors as infamous as Black Beauties?

[@pharanchemie8645]

Thank you Microwave 1

[@radioguy19510]

I have one of these that works very well but I am thinking about adding a 6C4 crystal oscillator. I can't wait until your next video. Thanks for posting.

[@MIKROWAVE1]

After cracking a crystal, I modified my high school build to add a 6V6 oscillator which allowed the 6DQ6 to operate as a class C amplifier. I did not know enough to neutralize it.

[@radioguy19510]

@@MIKROWAVE1 The first transmitter I ever built was a 6L6 oscillator from my dad's 1946 ARRL handbook. I took it to school as an 8th grade science project. I proved it worked by loose coupling a NE-14 lamp to the tank coil. My science teacher gave me a "D" because he said my soldering was not good enough. All that did was inspire me to learn how to solder and build lots of stuff so it was a good thing after all.... I really appreciate your videos and even after being licensed for 46 years, I still learn something from every video.

[@MIKROWAVE1]

@@radioguy19510 I remember seeing those "50Watt" 6L6 schematics in almost every radio book The 6L6 beam power tube was a wonder and in the Tri-Tet is was also a pretty good crystal cracker too!

[@jimw7ry]

3:05 Will the 5U4 handle 100 uF? Most tube rectifiers have a limit as to how large the cap can be.

[@scharkalvin]

The fuse won't have pass 1 amp when it shorts to blow the fuse. The fuse is in the power line, so the current that flows in the secondary of the transformer will be less than that in the primary due to the step up ratio.

[@MIKROWAVE1]

Yes! Good point and I imagine that the surge would be softened a bit as well through the transformer.

[@michaelmiller641]

Very interesting!

[@bob4analog]

Working out of the ARRL handbook.. That's the way I learned. Nice work! 73 de KD5MHQ

[@greggaieck4808]

Mikrowave1 your novice transmitter is cool my hobbys are painting pictures and lisining to shortwave and ssb iam thinking about getting my ham license I have 4 shortwave receivers me and my cousin are going to a Swap meet June 5th 2022 Sunday morning at 8 am in Milwaukee my other hobby is lisn to music records and CDs and fmstreo on my Yamaha reciver

[@joseluisoterodominguez7494]

Hello. Could you manufacture a transceiver transistors for novice and 10 watts A.M. Shortwave, very simple. With receiver T.R.F. Thanks

[@Steve-GM0HUU]

Thanks Mike. Initial disappointment when I thought that part 2 was the last of the series. Followed by delight when you said there would be a part 3. Ultimately, consumed by dread and anxiety as I envisage HC49's succuming to harmful testing.

[@MIKROWAVE1]

Those little cystals will scream and you will hear it. Sacrifices must be made.

[@kq6up]

I don't see anything but GHz frequency range sigs coming out of that meter hole. Remember the wavelength needs to be of the order of the size of the aperture to be radiated from a small hole.

[@MIKROWAVE1]

Another myth busted? That Shurite meter is a moving magnet type. i.e. the coil is fixed. That is why it is so wiggly. OK - maybe the radiation is magnetic - Hi.

[@kq6up]

@@MIKROWAVE1 do an experiment with an FS meter. Find a transmitter with no shunt caps right at the meter, and transmit with the meter covered and and covered with foil. My money is on it won't make a difference. If not, then I don't understand lower frequencies and small apertures at all. If that is the case, then CSUF owes me my money back for my masters degree, lol.

[@MIKROWAVE1]

@@kq6up This advice came from the old Handbooks at a time that TVI was the bane of ham radio. They even showed pictures of completely shielding the rear of the meter to the case. So it was more about a fear that a harmonic would be radiated into the case and sent out some other port like the power leads- not out of the front. It's moot anyway because they assumed that the meter was in the HV plate lead, not the cathode, as it is in this transmitter.

[@Gordonseries385]

👍

[@Capecodham]

Is this the one you bought for $10? And won't sell to me for $20? Did you attract any birds with the chirp?