#1
|
||||
|
||||
Philco 48-482 question
I was given a Philco 48-482 table radio recently. I typically don't restore tube radios, but given that this set has 3 IF stages for both AM and FM and a 7F8 dual-triode oscillator/mixer, it should be an extremely hot performer on the AM band. Can anyone confirm this?
Also, is the FM-1000 demod circuit a pain in the ass to align? When fully aligned, is the Philco a hot FM performer? I ask because when I'm in the states, I'm in a pretty difficult location for adequate reception of the FM stations I'm interested in. No sense in restoring yet another tube radio/tuner that doesn't pull anything in that I care about... |
#2
|
||||
|
||||
Ben,
I had a 48-482 that I restored and used on my desk at work where reception is poor (especially AM). I had no problems pulling in FM stations and could pull in a lot of AM stations as well. The audio quality of FM isn't as good as some later FM sets (I used to have a Grundig on my desk that had great audio) but it's OK. The FM-1000 detector can be a little finicky. Follow the alignment instructions carefully and you will be fine. I do remember after using the set for quite a while the FM quit. It turned out 47k resistor in the plate supply for the FM-1000 failed. I think this was a 1/2 watt unit originally and is dissipating at least that much. I replaced it with a 1 watt unit and didn't have a problem afterward. There are about 30 paper and electrolytic capacitors in that radio so there will be a bit of work to get them all replaced. Some are also a bit difficult to get at. I eventually took mine off of my desk just to get a little more room. It is a big set.
__________________
Sean - WØKPX |
#3
|
||||
|
||||
I've got one. I need to recap it eventually. It still works decently on original caps (I've only given it a few minutes of run time to test it though), performance seemed good for a early post war set (most post war FM sets seem to have weak FM)...It was getting comparable reception to a modern set.
I almost recapped mine, but it's a bit tight under chassis, one of the paper caps serves as a coil form (which would have made me re-stuff that then all the other caps to be consistent), and it works which makes it's recap priority lower than other projects that don't work.
__________________
Tom C. Zenith: The quality stays in EVEN after the name falls off! What I want. --> http://www.videokarma.org/showpost.p...62&postcount=4 |
#4
|
|||
|
|||
Quote:
That thing was $150 in 1948! They seemed to sell a lot of them. |
#5
|
||||
|
||||
Quote:
Exceptions to the rule of terrible post-war FM performance are the GE XFM-1 (mediocre), the Edwards Fidelotuner (mediocre), and the Meissner 8C (phenomenal). I'll move my Philco up the restoration queue. |
Audiokarma |
#6
|
||||
|
||||
Quote:
|
Thread Tools | |
Display Modes | |
|
|