That BC-221 and the LM meters were the pinnacle of the Heterodyne Frequency Meter idea. The Russians copied and innovated on the 221 and used them well into the 80's. My friend Ed who was a tech, was using them to net 2 Meter rigs as late as then!
Mike, thank you for your fun look at the good old days, I was very glad when I put my obsolete LM-frequency meter out at the local hamfest. As today's cellular technology is pushing the microwave limits and Marine and aircraft moved from VLF/HF, I'm hoping for a restoration of some more low broadcast band frequencies for amateur use. Then we can start talking about even more challenging antenna projects.
When I saw that the originals were vertically built, it clicked that they were an adjunct to the station and it allowed them to fit on the bench and be handy.
Ah yes the Model A. The first "modern" car. My buddy had one and two couples piled in, and we drove from NH to the Cape right through the tunnel under Boston!
Why is the G1 560k grid leak resistor not have a path connection to B-? Mite be one reason why it's drifting off frequency with the Grid bias of the 224 tube floating around.
Several ham stations were outfitted with crystals and they would send on a schedule. Check out pp33 chrome-extension://efaidnbmnnnibpcajpcglclefindmkaj/www.worldradiohistory.com/Archive-DX/QST/30s/QST-1932-05.pdf
@@MIKROWAVE1 Great Link ! I see the Standard Frequency Schedules on page 33. Also there is a list of Official Broadcasting Stations on page 52. It looks like they are broadcasting in the Ham Bands. Did you see the Bonus! Page 9. A Portable Compact Receiver using three type 30 tubes.
Mebbe I'm a bit too penn-dutch, but what's with the Jones plugs nowadays? They are $$! I woudda stockpiled heaps-o, and retired! I can see like $5, but $25? ...nah..... too spendy. I still have some with "$0.20" stickers from Lafayette on them. Eh, bygone era. 73 de W3IHM
Enjoyed this discussion of the new wavemeter and how it was used. The BC-221 video is one of my favorites of all time that I’ve watched several times.
That BC-221 and the LM meters were the pinnacle of the Heterodyne Frequency Meter idea. The Russians copied and innovated on the 221 and used them well into the 80's. My friend Ed who was a tech, was using them to net 2 Meter rigs as late as then!
Great info Mike and build , 73
Mike, thank you for your fun look at the good old days, I was very glad when I put my obsolete LM-frequency meter out at the local hamfest.
As today's cellular technology is pushing the microwave limits and Marine and aircraft moved from VLF/HF, I'm hoping for a restoration of some more low broadcast band frequencies for amateur use. Then we can start talking about even more challenging antenna projects.
Unless something changes, the low bands are becoming pretty signal sparse!
A neat series Mike.. Love the look of this construction...
When I saw that the originals were vertically built, it clicked that they were an adjunct to the station and it allowed them to fit on the bench and be handy.
Best of all, the whole station would fit in the trunk of a new Model A, along with an extra car battery or two. Very interesting. Thanks, Mike.
Ah yes the Model A. The first "modern" car. My buddy had one and two couples piled in, and we drove from NH to the Cape right through the tunnel under Boston!
Great Information!
Thanks for watching.
I like that. Very cool.
👍Thank you sir.
Thanks for watching!
Great project! I've really enjoyed it. Waxies? Re-stuffed? Oh well looks great!
Relaxy it's a Waxy ;) checked them before recycling. Perfect!
@@MIKROWAVE1 Ha ha! Looks "all original".
Well I grabbed junkbox parts that looked close at least!
This was a very interesting and informative look into the art and science of radio, thank you professor. 73's🎙KD9OAM
Glad you enjoyed it!
Why is the G1 560k grid leak resistor not have a path connection to B-? Mite be one reason why it's drifting off frequency with the Grid bias of the 224 tube floating around.
Hay you can add Polish laungage in video
Gretings Jacob
When I went to Poland in the 90s, I ate the native Carp! Vodka between bites! Let me figure out how to do this.
@MIKROWAVE1 Thanks you radio projekts it's may inspiration to lern elektronik radio.
How did Grandpa make a Nomograph? What frequency standards were available in the 1930's ?
Several ham stations were outfitted with crystals and they would send on a schedule. Check out pp33 chrome-extension://efaidnbmnnnibpcajpcglclefindmkaj/www.worldradiohistory.com/Archive-DX/QST/30s/QST-1932-05.pdf
@@MIKROWAVE1 Great Link ! I see the Standard Frequency Schedules on page 33. Also there is a list of Official Broadcasting Stations on page 52. It looks like they are broadcasting in the Ham Bands. Did you see the Bonus! Page 9. A Portable Compact Receiver using three type 30 tubes.
@JackKC8QPG these old magazines are gold.
Why not penthode instead of thethrode? I am relatevilly new here
Of course a Pentode would work great! But i'm trying to use the valves of the period in context to 1929-1935.
Mebbe I'm a bit too penn-dutch, but what's with the Jones plugs nowadays? They are $$! I woudda stockpiled heaps-o, and retired! I can see like $5, but $25? ...nah..... too spendy. I still have some with "$0.20" stickers from Lafayette on them. Eh, bygone era. 73 de W3IHM
www.ebay.com/itm/225214224625
A true penn-dutch would not even buy them at 5$!
Great Information !
Thanks Jack!