National NC-183D Ham shortwave receiver Boom it died, Quick Fix and it lives again Classic Radio
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- Опубліковано 25 січ 2023
- My main Ham radio station went boom today. Had the receiver on as always listening to 40 meter band while I work. Suddenly the receive fell off, before I could get to it to kill power there was a loud pop and smoke coming up from the chassis. I could smell the burnt capacitor electrolytic paper. Opened it up, discovered a popped cap, burnt resistor and shorted bumblebee, To get my station back up & running I elected to just replace the failed components. In the long run, I will need to take the receiver out of line & completely recap it with modern reliable components. It is a long tedious job. So, I will have to ensure high priority repairs are complete. Yes, I know these new SDR receivers are very reliable and full of features, but there is nothing like tuning the old tube receivers, smelling the hot tubes and listening to the push pull 6V6 tubes!
NOTE: This was a quick repair to get my station running again. A good comparison is: Your at sea running a barge, the engine, blows a hose and shuts down. Its an old ship with many ailments. No time to strip down the engine and install your acme rebuild kit. What do you do? replace the hose, get her back on course. Maybe when time allows, she can go to drydock and get the attention required. Thats the same story here. Unfortunately, My equipment is not top priority, customer ones are. - Навчання та стиль
The craftsmanship of the under chassis is amazing! Thing of beauty! Glad it fired up!
WOW ! I LOVE That National NC-183D Receiver !!! Wish I could find one in that shape.... Those Bumble-Bees are nutritious for shorting and having problems !
They don't make electronics with that quality of work anymore,good job!
Great job, Terry! Reminds me of the time a resistor blew apart with a bang in an open chassis of my Zenith Trans-Oceanic R600. I had just recapped it, and solid stated the power supply. I was getting ready to align it. It was propped up 2" off the table with a copper sheet under it. The bang and the flash was remarkable and scary. Lost 3 tubes and 4 resistors in the tube filament string. Later someone told me on the Zenith T-O reflector to change the resistors in the string, and I hadn't even told him what had happened yet. I have a five-part video series here about it.
73 Paul AA1SU
Great video thanks! I’m very surprised you were using that awesome receiver without replacing all of those worthless caps onboard.
Nice solid model, sir
Very nice receiver. The quality of the chassis clean and bright with tube´s ID´s. Incredible.
Another one up and running.
Hey, thanks for being here and showing us all the things you're accomplishing. I too have a NC-183 (not D) with issues. Watched most of your vids that apply, and have made progress. Got the audio chain fixed but, still no RF signal. A work in progress. Big fan of yours. Friends with Timtron and others here in Maine. I have MANY pieces of ham built tube gear from the '50s and '60s, which means... too many projects? Makes me wish the radio room wasn't on the second floor! Keep us informed and inspire young folks to get involved. 73s Vern WA1CYL
I appreciate your content thanks
Super !!!
Love the ham videos Terry! Hope you get to feeling better. -KE0QEU
Incredible story on the estate. Looking forward to a vid on the recapping. 🎉
Nice repair Terry. Sweet receiver
That was a quick diagnosis and repair for sure.....
I have been doing mine as well, The red caps that are in it read ok but I probably should change them out. Thanks for sharing Terry!
Top-side it looks brand new -N8CA
Gorgeous receiver. I don't know how long you've had it, but I'm surprised you hadn't already changed out those lousy caps by now.
Hi Terry, love your videos. Please increase the length of them by 10 minutes. Thanks.
That was my first receiver.
pretty impressive exploded electrolytic cap you found in there and the shorted resistor make for an interesting explosive situation. I see more replacement parts in that receivers future.
Yep, I need to make time to at least get those old Bumblebee caps changed
May have to call in some help with repairs!🐀
Glad to help out
Bumble Bombs......... It's likely a job to do soon. That looked like a replacement Electrolytic... Bad batch? or underestimated voltage peaks?
smoke !!! no good that ........ ka2kug
You calibrator doesn't look out of place AT ALL. Without you telling it (okay and your label on there), I would never have suspected it not being original.
What made the electrolytic blow up? Did you just choose the wrong one or did the other fault somehow led to a way higher than normal voltage to it?
Is it the one in the power supply, which creates the bias for the AGC? This one is bridged by 500Ohm though, so high voltage is quite unlikely?
"National Treasure" 😂😅
A thing of beauty
The exploded electrolytic was a modern one, had you already replaced that once before?
Yes about 5 yrs ago
I thought you said you were going to do more vintage hifi videos?
Trying to provide a mix, 1man show here
The electrolytic cap that exploded looks modern. Had that been replaced?
Yes, about 5 years ago. That cap was rated 200VDC, applied voltage is around 65. There were actually 2 of them in that power supply feed. Radio has been in use weekly, so they had a long time to blow up!
So I've been watching you for about three years and you DIDNT check resistors nor caps???? Okay I'm in the twilight zone!!! What the Hell happened? Why didn't you go after those components??? Shame on you Terry