Very common on the tube set for the capacitors to need replaced. they go bad with age and can cause undue hum. Caps arent expensive -- that sure is a clean chassis--!!
AM/FM in tube radio is great. I think that FM here in Australia come too late because none of my tube radios has it and unfortunatly local AM stations are complete crap so I don't listen to them.
BTW - even with the camera mic it's easy to hear that nice fat tube sound when the Beatles come on, isn't it amazing.
Great presentation, I do love the sound of that radio. My only question at this point is, why would the AM sound clearer than the FM? Even when you used the AFC control, it still sounded like the FM wasn't tuning in properly, unless the antenna wasn't fully extended or attached.
@CassetteMaster The FM detector may need realignment, but you would need a low power FM transmitter modulated by a sinewave tone at maximum standard modulation, and an oscilloscope tapped off the audio output of this radio. The detector would consist of two RF transformers with a twin detector tube, the circuit is like two slope detectors 180 degrees out of phase, but if there is only one slope detector like some tuners have, there is nothing you could do about the distortion.
@CassetteMaster It may be also because nowadays FM broadcasters since the manufacture of that radio had increased their deviation along with the introduction of FM stereo. Again you can adjust the detector but it is touchy work requiring professional instruments to maintain linear audio during adjustment.
CassetteMaster does this unit have a jack for headphones or external speakers, i had an old unit that had the AC power on one side of the speaker line and I wanted it to run on DC but i couldnt figger it out i wanted to rig it to run on DC and be able to take headphones, it must have had a rectifier in it that i didnt know about that id have to remove for it to run DC
i got a 1959 ge musaphonic am/fm tube radio off ebay. it works, but the phono input hums once i connect something to it including a turntable. i replaced 2 wax caps and this unknown type of cap all rated at .047uf, but nothing happen. any suggestions?
now thatz high quality rite there. cool songs at .50secs, 1:24mins, 1:56mins, 3:03mins, 4:34mins, and at 4:49mins. by the way read me the numbers of the speaker magnet so i can determine the date code and also i wanted to mention that beach boys song was stuck in my head before i want to puerto rico.
I do have a tape recorder by National Panasonic it's a model RQ-421DS from around 1973.
The "National" brand was stopped in 2008.
Chao772VersionIV 4 months ago
Very common on the tube set for the capacitors to need replaced. they go bad with age and can cause undue hum. Caps arent expensive -- that sure is a clean chassis--!!
yambo59 2 years ago
真空管ラジオ
良い
denshisan 3 years ago
cool radio
ciarangordon 3 years ago
AM/FM in tube radio is great. I think that FM here in Australia come too late because none of my tube radios has it and unfortunatly local AM stations are complete crap so I don't listen to them.
BTW - even with the camera mic it's easy to hear that nice fat tube sound when the Beatles come on, isn't it amazing.
dailylifetube 3 years ago
Great presentation, I do love the sound of that radio. My only question at this point is, why would the AM sound clearer than the FM? Even when you used the AFC control, it still sounded like the FM wasn't tuning in properly, unless the antenna wasn't fully extended or attached.
Gary
musicman0150 3 years ago
I'm not sure what exactly is causing that.
CassetteMaster 3 years ago
@CassetteMaster The FM detector may need realignment, but you would need a low power FM transmitter modulated by a sinewave tone at maximum standard modulation, and an oscilloscope tapped off the audio output of this radio. The detector would consist of two RF transformers with a twin detector tube, the circuit is like two slope detectors 180 degrees out of phase, but if there is only one slope detector like some tuners have, there is nothing you could do about the distortion.
Cringle84 1 year ago
@CassetteMaster It may be also because nowadays FM broadcasters since the manufacture of that radio had increased their deviation along with the introduction of FM stereo. Again you can adjust the detector but it is touchy work requiring professional instruments to maintain linear audio during adjustment.
Cringle84 1 year ago
CassetteMaster does this unit have a jack for headphones or external speakers, i had an old unit that had the AC power on one side of the speaker line and I wanted it to run on DC but i couldnt figger it out i wanted to rig it to run on DC and be able to take headphones, it must have had a rectifier in it that i didnt know about that id have to remove for it to run DC
coondogtheman1234 4 years ago
It has an external speaker jack.
CassetteMaster 4 years ago
thats cool, does it have an aux input for like an mp3 player
coondogtheman1234 4 years ago
No.
CassetteMaster 4 years ago
Dang if i had this set id love that bassy speaker for my little mp3 player
coondogtheman1234 4 years ago
Very nice radio
mariopica 4 years ago
Cassettemaster did you have a cold when you made this video
coondogtheman1234 4 years ago
I'm pretty sure I did.
CassetteMaster 4 years ago
I saw one but I didnt getr it once I see another one it's mine!
raymondleeleggs 4 years ago
same here
rusty8mm 4 years ago
I've finally got one. it's a RCA/Victor 1-R-81 from 1952. I can't seem to get the fm to work. do you have any suggestions, cassettemaster?
rusty8mm 4 years ago
Bad capacitors?
CassetteMaster 4 years ago
i got a 1959 ge musaphonic am/fm tube radio off ebay. it works, but the phono input hums once i connect something to it including a turntable. i replaced 2 wax caps and this unknown type of cap all rated at .047uf, but nothing happen. any suggestions?
damusician 4 years ago
May be more bad caps?
CassetteMaster 4 years ago
Do you have a stereo with BSR turntable?
raymondleeleggs 4 years ago
Yes.
CassetteMaster 4 years ago
Nice radio. :)
bootsnfurrugs 4 years ago
That sounds pretty sweet for a small tube Am/Fm radio. Are the tubes in the radio made by Matsushita Electric Industrial Co, ltd. Too?
EmersonCollie 4 years ago
CassetteMaster nice Radio now I Regret buying that tube radio I saw at that church yard sale
coondogtheman1234 4 years ago
That radio sounds and looks great!
This is very similar to my 1962 Panasonic, which I posted a response to. I showed mine in operation with the back off, though it was a bit dark.
speedyc395 4 years ago
now thatz high quality rite there. cool songs at .50secs, 1:24mins, 1:56mins, 3:03mins, 4:34mins, and at 4:49mins. by the way read me the numbers of the speaker magnet so i can determine the date code and also i wanted to mention that beach boys song was stuck in my head before i want to puerto rico.
damusician 4 years ago