Welcome Guest! Be sure you know and follow the Phorum Rules before posting. Thank you and Enjoy! (January 12) x

Thread Closed
Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5

Philco 48-482 Alignment
#1

Good Morning,
I've gone through the AM alignment with a breeze....and she works great...

"BUT"

That darn FM alignment has me and my 75 year old,  experienced friend baffled.  If you can help me with the first step I'd appreciate it....   The FM works but it's a bit garbled.....

Here's a pic of the first FM alignment instructions.....
   

  it says to make this device with a cap and resister...and place it where?  and this "Padder" from what I gather is just a trimmer cap in one of the if cans that's used for adjusting the Lower frequencies??
   

Thanks Much,
Mike
#2

After digging a bit I found this off of the Antique Radio site by Tom Albrecht....

https://antiqueradios.com/forums/viewtop...6&t=284598

So I'll attempt his method.....
Mike
#3
Lightbulb 

The alignment for the most part went well....

Seems that I read somewhere that if you tune in a weak station, it comes in loud, but along with all the loud noise as well.  Also during tuning, it's very noisy until you get right on the station and I think this is normal for FM during this era...  If I have good reception, I get a very good clear signal.....I had the FM antenna wire weaved in and out of the power cord (twisted cloth covered cord) but it didn't seem to help much.....until I unplugged the Philco from my Variac which is also an isolation transformer and plugged it directly into the house outlet....a very nice improvement...

A little more fooling around and I should be done...

Mike
#4

Hello Mike, that's an indication the AGC (AVC on Broadcast) is doing it's job. On weak or no stations the rf amps are biased for max gain, therefore the noise is very noticeable. Strong signals will lower the gain to throttle back the blast. It's "automatic".
#5

Thanks for the reply RodB...

I've enjoyed working on this Philco and I found that replacing the caps weren't as hard as some had mentioned in postings....    This is no Marantz Stereo, but it was probably quite a nice receiver back in the day...

Couldn't find the clear "slip over" caps that went over all the brown pushbuttons, but the P-touch label maker did a nice job...

Went antiquing the other day with the wife and found 3 tube radios...not worth the time though...I guess I'd like the next radio to be more aesthetically appealing, as well as a fun restore...


Thanks for the help from the forum members!
Mike


Attached Files Image(s)
       
#6

Looks very nice!




Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
Need Help to ID this radio 11 tube Philco
Yes the 16B as morzh pointed out. Specifically its the January 1935 model version of the 16B. There are a couple earli...klondike98 — 11:51 PM
48-482 rear panel help
Welcome to the Phorum, keithchip! How far you take a radio on cabinet restoration is a matter of personal preference. ...GarySP — 11:28 PM
48-482 rear panel help
I've recently finished the internal restoration of a locally purchased Philco 48-482. The cabinet is in ok shape except ...keithchip — 10:28 PM
Need Help to ID this radio 11 tube Philco
Welcome to the Phorum, Ken! Lots of help here for all of your restoration questions. Take care and BE HEALTHY! - Gar...GarySP — 07:59 PM
Need Help to ID this radio 11 tube Philco
Thank you. I went to your online library and found 2 schematics. I will download and compare to components!Ken D. — 06:31 PM
Need Help to ID this radio 11 tube Philco
It is a 16B tombstone.morzh — 06:13 PM
Zenith H725
David - sorry, I reread your post and finally saw THD - now the % figures make sense. Thanks for explaining. The PSU...EdHolland — 06:06 PM
Need Help to ID this radio 11 tube Philco
Hi Everyone, New member but have been reading this for awhile for tips! Vaccum tubes were before my time so bear with ...Ken D. — 06:03 PM
My Philco 37-116 Restore
Thank you MrFixR55, I appreciate your comments very much. I do not detect much hum if any so I will be staying with the ...dconant — 05:15 PM
My Philco 37-116 Restore
Hi DConant Yes, you can replace chokes with resistors.  You do stand the risk of increased hum.  the solution is to inc...MrFixr55 — 04:23 PM

[-]
Who's Online
There are currently no members online.

>