[Eric Adams]

Hi Guys,


I have an interesting problem this time. I Did a full recap on this AM/FM radio, along with a complete tube and resistor check. I got it all together and had it up in the kitchen where I've been listening to it for a couple weeks. I was listening to it the other day when all of a sudden the volume dropped and I had no sound on either band. Well, back to the bench. I plugged my iphone and was able to hear it just fine. Put the band switch back to AM or FM and nothing.
The weird thing is that one resistor-R16 a 1K, was starting to smoke. I swapped out the 6X5 but it didn't help. I retested all connections and they all look good. Any ideas? (35WG and 25WG)

[morzh]

Either the tube 68A6 or C19 cap, 5000mmf connected to that resistor, SG of the tube and output xfmr

[Radioroslyn]

Hi Guys,


I have an interesting problem this time. I Did a full recap on this AM/FM radio, along with a complete tube and resistor check. I got it all together and had it up in the kitchen where I've been listening to it for a couple weeks. I was listening to it the other day when all of a sudden the volume dropped and I had no sound on either band. Well, back to the bench. I plugged my iphone and was able to hear it just fine. Put the band switch back to AM or FM and nothing.
The weird thing is that one resistor-R16 a 1K, was starting to smoke. I swapped out the 6X5 but it didn't help. I retested all connections and they all look good. Any ideas? (35WG and 25WG)

Check for shorts to the chassis around L-13 and bad C-19.

GL

[Eric Adams]

OK, here's what I did. I tested the cap, IF trans and resistor. They all tested good, each one was removed from the circuit for testing. So I put it all together and with all tubes out except the 6X5 (the way I ran all tests). I ran up the voltage slowly, watching the resistor in question for any smoke. Got it up to about 110v with no smoke or heat. After about a minute of this there was a spark under the area of the tuning cap. No smoke or flame (Wow, I sound like kirk). I figured I can't hurt it anymore so I killed the power and installed the tubes. I ran the power up and after a few minutes the radio was working fine. No, I haven't checked where the spark came from, but I will. Thanks to everyone for your help.