Learn to Troubleshoot Tube Radios - Step by Step
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- เผยแพร่เมื่อ 16 ธ.ค. 2023
- Mike take you through his step by step system to troubleshoot your old tube radio. The required equipment is discussed in detail along with how to set up and execute each step and get results.
Troubleshooting a radio, if you follow these simple steps and be easy and fast! Even for a new comer. Please Subscribe!
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Thank you Mike. Good information.
A great primer indeed. Thank so much for sharing your time tested knowledge. Much appreciated.
Excellent video. Thank you for sharing your knowledge with us. I have booked my front row seats.
Thank you. Great video.
Great video. Great demonstration both theory and practice.
Very good video. Nice set of steps and tests. I'll be using this process and procedure in my restorations. Thanks.
Thank you, great job !
We’ll done
Thanks for great video. On that B+ thing, in other countries like Europe is named as Constant Corrent, few countries call it Direct correct. My Daughter is a electrical engineer and she asked me the other day. What the heck is B+. I said it came from Batteries. I rather say positive +DC or Negative -DC to avoid confusion. It's just my preference.
It may help some to show where you inject the 455Hz.
Most of the time the manual for the radio will tell you. If not, the RF input of the mixer.
What is the model number of the function generator. Great video very interesting.
th-cam.com/video/rVx9xYx6_PQ/w-d-xo.htmlsi=ICYZvhYgnt457qUN
Is the radio powered on when using the signal tracer?
Absolutely. :)
my FM is not working, it was for a few minutes then it die on me, my radio is a loewe opta telefunken. what could be? the ECC85 is good for FM
i have what appears to be a bad solder connection except i sucked off and reheated every single solder connection in the radio. I also cleaned all tube pins and sockets. Replaced all resistors and caps. yet i have an intermittent crackling and sensativity issue. The sensativity comes and goes. poking in the radio and wiggling does nothing. Moving tubes does nothing. But if i stand in the center of the room and lightly tap my foot it will crackle and reception will get better or worse. just like a bad solder joint.
hitting chassis or tubes does nothing.
only standing in room and hitting my foot on the floor or rolling my desk chair across the floor will cause the reception (connection issue) to either improve or get worse with a slight crackling.
im at a loss what to do
Radio model?
@@MikesRadioRepairRestoration radio is a philco 42-380 code 121
Since this i have replaced all the tubes thinking maybe a bad connection inside tube but no change. I cleaned the band switch multiple times. I poked and wiggled everything in the radio for the last three days and no change but tapping foot on floor gently and or rolling desk chair slowly across floor causes the crackle and great / poor reception problem. Something acts like its loose but cant find it. I even jumpered each terminal block to chassis that is tied to chassis with a rivet.
This thing is driving me crazy and im to a point where i just dont know what to do anymore.
@@kwacz I havent looked at the schematic, but its time to consider silver mica disease.
@@MikesRadioRepairRestoration thought about it but the if cans are not the type that get this. They are the older style. It is vibration influenced but poking tapping on micas does not cause any change. If it is a Mica it would have to be one of the point to point ones but not sure how to figure out which one
@@kwacz Based on your description, I think you will find a silver mica shorting. They arent that hard to find if you have a signal tracer or o scope and s signal generator. I assume you have correctly serviced your tuning cap contacts?
I have had a couple of beginners ask me what to use for tracing if they have no equip,emt yet. They also don't hve the RF/AF switvhable probe. Any tips?
A signal tracer or scope in the minimum entry ticket. Please watch - th-cam.com/video/biYfpkCCLbg/w-d-xo.htmlsi=pg5nUYGRzGojYtt6
I am very grateful for you doing this video. Have a couple of valve radios that need fixing. So it's perfect timing.
So did you inject the signal through a capacitor?
Yes
@@MikesRadioRepairRestoration good information, I’ve never done it but know of it . What value of capacitor ?
@@jerrypeal653 its not critical. .1, .01, .047.... Just make sure it has the proper voltage rating.. 450 or better.
@@MikesRadioRepairRestoration ok , thanks . I’m 66 and just getting into the hobby so much appreciate your input!
Also just ran across your channel and subscribed .