AWA Linc Cundall Memorial CW Contest 2020
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- Опубликовано: 4 фев 2020
- The AWA sponsors several fun old time radio events for amateurs throughout the year. The Linc Cundall (W2LC SK) is held every January, and it is all about celebrating gear and designs before 1950.
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Thoroughly enjoying your videos, Mike.
As a new (two year) Technician Ham, I feel like I'm learning from the master. 73
I went and bought the 1959 Radio Handbook because of your videos. I'll see how it compares to my old ARRL books when it gets here.
Missed you during the LC but thanks for the Bruce Kelly contacts, 73
Very nice. QSOs can be made without SDR, waterfalls, QSK operation and so on. Linc, W2QY, gave me my novice test back in 1968. I remember going over to his house. His shack was just off of the living room with a nice bay window. He had the Heathkit SB 300/400 line with a big old tuner. Ladder line going off into the trees. He could carry on a conversation with us while carrying on with a CW QSO. My dad worked with Linc and Bruce at Kodak. I visited the AWA Museum this past summer, started by those guys. Good days. Thanks for sharing.
Wish I had known about this last month, I have a Harvey-Wells 50C and a S-40 for such things.
Lee, WA8QFE
Excellent videos Mike - all of them!Lets NOT forget the Conar 400 “Crystal Cracker” transmitter!
I only wish we had instructors like you at Drexel and MIT decades ago... 73 de Howie WA3MCK
Thanks Howie! Oh I have cracked plenty a crystal as many on this channel have! I think that 6DQ6 single tube transmitter in the handbook was the king of crack.
well....about time we see another video....Hi, Mike....I'm-a-watchin'.....de AB5ZA/7....
Hey mike i love your videos you can hear number stations ? Is so fasinating 👍🙂 this radios from 30s 40s and 50 s have good design
My favorite old time receiver circuit I'd like to build is a three tube hybrid superhet/regen with a 6K8, 6A8, or 6SA7 converter to a 1400-1700khz IF (lower range to use IF cans from command set), 6J7 or 6SJ7 regen detector, and a 6G6G, 6K6GT, or 6F6 af stage. The 6G6G is really nice here, low power tube, perfect for headphones. Perhaps using output transformer from a command set. If using 12v tubes, 12K8 or 12SA7, 12SJ7 or 12SK7 , and a 12A6 (command set). Have to wind two sets of coils, but you can use the antenna coil from one band as the oscillator coil for a lower band. Separate VFO and Antenna variable caps, plus a bandspread cap.
Since ft243 cyrstals are getting rare and expensive, I might use a microprocessor controlled Si5351 DDS chip to drive the crystal oscillator. A bit of a cheat maybe, but exactly how one would use a VFO.
scharkalvin , I wondered if someone would "cheat" a bit because of the scarcity of crystals... LOL But really, what is one to do? de KQ2E
Yes, back in the 60’s and 70’s I remember purchasing crystals for between $1.00 and $5.00 each! Now, if you can find them, I’ve seen prices as high as $20.00 a piece!
You can drive almost any Crystal rig. With an old style VFO. I use an old HG-10B Heath VFO.
Nice Mike! 73 TNX XE1YZY
*WAITING FOR A COLLEAGUE*
W2AO likely was using a non period rx with tight passband.....I like a wide rx until QRM forces me to tighten up..usually that is seldom.. I got started with a variant of that xmtr back in '58..one rock 7162kc. Fun days..
grs6252 , Wow, same xtl for me, too, back then! They must have had a use for them as they were all over the place. de KQ2E
Great video Mike -- thanks a lot. Your comment about the rectifier in the transmitter reminded me of questions I've had about solid state diodes in power supplies. When did we start seeing these solid state diodes in ham power supplies? When did we we start seeing them in detector circuits? And how does the AWA feel about this intrusion of solid state into antique wireless gear. Thanks again. 73 Bill N2CQR
Well the diodes show up early in military systems for signal work but for power we see the selenium rectifier in the late 50's for one reason. Cost. Any semi that was cheaper than a rectifier tube was the winner. Even AC/DC sets like the S-120 use the selenium rectifier. Silicon diodes hit early 60's. Germanium never really had the PIV for HV.
@@MIKROWAVE1 , I remember the FIRST silicon diodes I had... I was SCARED TO DEATH of ruining them. Too expensive to trust to luck, so I ran them totally WAY under their ratings. Still blew one up! LOL
Having a problem with a eye tube
If you could look at my video and
Tell me what's going on l'd
Appreciate it.
Video name jr mcloud
DO THAT ANYTHING ON TRANSISTORS. LAMPS NOW NOT RELEVANT