Hello Ten-Tec Friends, Very happy to report that my C22 is back on the air!! I had a series of nice QSOs this afternoon, with good reports from Utah, Idaho, and CA. In the end the problem with the tr
Thanks Bob! Now I understand what the crystal calibrator is all about =) The rig is really fun to use. Here was a quick SOTA chase that I made earlier with the C22: https://www.youtube.com/watch?v=Fa
Thanks Bob! I was really happy that the finals were OK, and were not the source of the 'no TX' condition. My C22 does in fact have the calibrator, so adjusting the skirt is easy. I agree that it is p
One final plea before I re-engage lurking mode... I'm looking for a copy of the Century 22 manual. Either to buy or just to get a clean, high-quality scan so I can have my own copy printed. I already
Great advice from Bob. The Century 22 that I recently acquired had the exact same symptoms: RX was good but no TX. Much of the problem turned out to be due to a poor connection to the final amp board
Hi John, I have a C21 digital. You might find something useful here: https://drive.google.com/open?id=0B_pjAwEfeYcdYmRaTUhRTnN6SFU You can run it safely on external 12V! I've run mine that way quite
Yes, this is a good point Perry - sorry I forgot to mention that. T-T did sell an external breaker for this purpose, but they are hard to find these days. When I was running my C21 on external 12V I
P.S. here is the link to the QRZ thread - lots of good stuff in this thread. https://forums.qrz.com/index.php?threads/ten-tec-century-21-restoration.522748/page-10#post-5167967 -Josh
Hi Dale, Recommend you watch the following video by AA4OO on the topic: https://youtu.be/ZYlMuNCCExg I've been meaning to set this up my self for a while now. Have fun! 73, -Josh WU7H On Wed, Aug 28,
Incidentally, I recently talked to Dick Frey. He lives in Oregon. I'm going to have a QSO with him, and I'm going to use my C21 Digital! =) -Josh WU7H Seattle, WA
Hi Paul, You are in luck. I posted high quality scans of the entire manual here: https://drive.google.com/drive/folders/0B_pjAwEfeYcdYmRaTUhRTnN6SFU?usp=sharing Here is a file where I put the two pag
It appears I was wrong about running the C21 on external 12V power. Several people told me they ran C21's on 12V battery power many times, back in the day. I also ran across this: http://www.tentecwi
Hi Gary, I tried lifting the ground wire. No change. I replaced the big filter cap. No change. It's possible there is a leaky cap causing the hum, but short of replacing all the capacitors in the rad
Thanks for the very informative reply Gary! I will try shielding the transformer. I don't have any nickel foil, but I've got some thin steel plate! Seems like that should have some effect on the nois
Thanks Jim and Gary for sharing your considerable knowledge on causes and cures for buzz / hum. I'm reading over all you have sent (a couple of times!), and also reading the PDF that Jim linked to. I
OK, I tried this trick and I found 3 'tropical fish' capacitors that buzzed like a SOB when I touched the 'probe' to the positive lead. 2 on the audio amp board, and one on the pre-amp board. What sh
This kind of capacitor: http://s337.photobucket.com/user/jusepics/media/Tropical_Fish_Color_Chart.png.html http://www.electrojumble.org/TropFish_a.jpg cracked. Think its worth replacing them? I'm abo
My shielding attempts made no difference. I also unbolted the transformer so I could move it around slightly (as much as the leads would allow). That had no effect. I think my next step will be to re
Hi Gary, Thanks for the offer! I may take you up on that pending the outcome of my next round of work. I'm going to replace all the cracked capacitors - found a couple more, one of them on the power
Just noticed this C21 Digital on eBay: http://www.ebay.com/itm/Working-made-in-USA-DIGITAL-Ten-Tec-Century-21-with-a-keying-issue-/232358014086?hash=item36199dec86:g:dzkAAOSwAPVZMaJ3 "Although there