I just saw the video today, and I don't have enough words to thank you for your help and your time. This is an excellent explanation on troubleshoot I will start working on the radio tomorrow, Hopefully I can get it working again. I know there are more newbies out there that will benefit from this video, Again Thank you very much.
I'd say your tutorial has done Oldbulboradio proud Dennis. You not only have expertise but also have lots of patience which are virtues when teaching - well done my friend. Phil.
Extremely helpful, thank you! This is one of the most invaluable videos I’ve seen on radio repair. Got a radio I’m working on now that has me baffled and I’ve been trying to diagnose some voltage and signal issues. This certainly helps clarify things for me. I’m about ready to give up, though, as I’m frustrated and all resistors and caps check out. I do seem to have some problems with no voltage where there should be negative voltages and I’m hoping this video will help. Knowing that the negative voltage originates from the AVC may just help point me in the right direction.
Very helpful, I was trying to trouble shoot a 1937 Continental Radio with a schematic that leaves a lot to be desired. Your tips for troubleshooting led me to the problem pretty quickly... Darn broken wire, knew it was in the IF someplace.
Super information Dennis. I keep expecting to get a bill in the mail for tuition payments. Your videos are like going to class. *_KEEP IT UP_*, my friend!
Thanks Art for the kind words. The next video will be on my Hickok I-177B tube tester that I have been working on. So stay tune. Thanks again. Your friend Dennis
Very well explained video, Dennis! At 9:52 you lost me for a moment, because to shut down conduction in a tube is it not so that you need a high NEGATIVE voltage bias in reference to cathode? I am a bit confused, clarification would be hugely appreciated, cheers from Germany.
I really appreciate this vid ☺ I got my first tube radio from the 1950s it's untouched and looks really good, looks like it wasn't used much but it needs caps I'm sure but I'm waiting for a ESR meter I ordered before I plug it in.. Now I'm looking for another one lol its addicting..
Complete NOOB here. How do you find a negative voltage? Or, what is meant by negative voltage? Is that something like, the return [to neutral] voltage of/to the mains? Please explain - I'm really trying to learn more about electronics. Thank you
I've got the amp from a 1965 Zenith MM2670 that just spent a year and $350 at a guy's shop getting fixed but it isn't fixed. He gave up and gave it back to me. I have it sitting on my desk and I can tell he replaced 2 small caps but ignored everything else. it is so frustrating trying to get this thing fixed.
thank you very much for your time to share years of invested time and knowledge. Your approach in teaching is perfect for me and its appreciated sir. Do you have a way to donate? thanks kindly, David from California
Hi Dennis, can you do a video on FM signal tracing on a Normal FM circuit board. What I mean is If you are repairing a Radio (Not Tube) and you do not have audio out.. How you can trace back the signal to repair it. I would really like to learn this.
I have a 1977 Fisher 142-9253 4700. It had set for 20 years. I turned it on. It worked for a couple of days. Then it went to static and the strength meter, went max. Any ideas on problem. Also do you know of any site that has the schematics for fisher? Thanks Chuck
It looks like you may have the wrong model number. None of the Fischer model numbers I found look like the one you posted. Once you get the right model number you should be able to find a schematic for it.
It is a pity that the schematic diagram was not visible enough, that is to say not close enough in order to be able to see the simple components beginning from the tube and ending to the single elements composing the circuit under control. Otherwise the idea was good .
I learned more watching this video than I have in the last two years trying to learn antique radio repair by my self. Thank you and God bless.
I just saw the video today, and I don't have enough words to thank you for your help and your time. This is an excellent explanation on troubleshoot I will start working on the radio tomorrow, Hopefully I can get it working again. I know there are more newbies out there that will benefit from this video, Again Thank you very much.
I'd say your tutorial has done Oldbulboradio proud Dennis. You not only have expertise but also have lots of patience which are virtues when teaching - well done my friend.
Phil.
Extremely helpful, thank you! This is one of the most invaluable videos I’ve seen on radio repair. Got a radio I’m working on now that has me baffled and I’ve been trying to diagnose some voltage and signal issues. This certainly helps clarify things for me. I’m about ready to give up, though, as I’m frustrated and all resistors and caps check out. I do seem to have some problems with no voltage where there should be negative voltages and I’m hoping this video will help. Knowing that the negative voltage originates from the AVC may just help point me in the right direction.
Dude! Thanks!!! This is what I needed. Love the video and content.
Thanks Dennis, very helpful information on troubleshooting.
Very helpful, I was trying to trouble shoot a 1937 Continental Radio with a schematic that leaves a lot to be desired. Your tips for troubleshooting led me to the problem pretty quickly... Darn broken wire, knew it was in the IF someplace.
Bob Wendoloski Thanks for watching.
Dennis, this is a really excellent video I hope OldBulboRadio gets a lot out of it. Regards - Andrew
Super information Dennis. I keep expecting to get a bill in the mail for tuition payments. Your videos are like going to class. *_KEEP IT UP_*, my friend!
Thanks Art for the kind words. The next video will be on my Hickok I-177B tube tester that I have been working on. So stay tune.
Thanks again.
Your friend Dennis
Looking forward to it!
Very informative video. We all need to see that before diving in.
Thanks for watching. I'm glad you like it.
Dennis
Great teacher the best info not fast
Dennis,
Good class, my friend. Made perfect sense. Interested newbies will get much from it.
Regards,
John
Very well explained video, Dennis! At 9:52 you lost me for a moment, because to shut down conduction in a tube is it not so that you need a high NEGATIVE voltage bias in reference to cathode? I am a bit confused, clarification would be hugely appreciated, cheers from Germany.
Great video. Your voice reminds me of John Wayne (RIP).
I really appreciate this vid ☺ I got my first tube radio from the 1950s it's untouched and looks really good, looks like it wasn't used much but it needs caps I'm sure but I'm waiting for a ESR meter I ordered before I plug it in.. Now I'm looking for another one lol its addicting..
Thanks for the wonderful tutorial!
what exactly are a b c b+ etc. voltages? how can i identify them on a schematic?
Complete NOOB here. How do you find a negative voltage? Or, what is meant by negative voltage? Is that something like, the return [to neutral] voltage of/to the mains? Please explain - I'm really trying to learn more about electronics. Thank you
best video ever!
I've got the amp from a 1965 Zenith MM2670 that just spent a year and $350 at a guy's shop getting fixed but it isn't fixed. He gave up and gave it back to me. I have it sitting on my desk and I can tell he replaced 2 small caps but ignored everything else. it is so frustrating trying to get this thing fixed.
thank you very much for your time to share years of invested time and knowledge. Your approach in teaching is perfect for me and its appreciated sir. Do you have a way to donate? thanks kindly, David from California
I used to have one of those old RCA tube manuals, that is handy to have.
Bri G. They do come in handy. Thanks for watching.
Hi Dennis, can you do a video on FM signal tracing on a Normal FM circuit board. What I mean is If you are repairing a Radio (Not Tube) and you do not have audio out.. How you can trace back the signal to repair it. I would really like to learn this.
+Andre Gopee Good question, I'd like to see that too.
Very good job, thanks.
I have a 1977 Fisher 142-9253 4700. It had set for 20 years. I turned it on. It worked for a couple of days. Then it went to static and the strength meter, went max. Any ideas on problem. Also do you know of any site that has the schematics for fisher? Thanks Chuck
It looks like you may have the wrong model number. None of the Fischer model numbers I found look like the one you posted. Once you get the right model number you should be able to find a schematic for it.
im trying to fix my radio in my s500 mercedes need help ty.
It is a pity that the schematic diagram was not visible enough, that is to say not close enough in order to be able to see the simple components beginning from the tube and ending to the single elements composing the circuit under control. Otherwise the idea was good .
Bess advise to New guts; gadden ONE part changed at a time, then see if it still worken...
I got a inop code radio get any power
I am sure those old caps dont help much.
Why in GOD name you left these old caps in they have to go
Think you need to buy a new shirt, the state of that