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

48-460 poor tone quality and squeals on stations
#1

I have just finished recapping my "Hippo" 48-460. The set seems to have too much treble and sounds shrill. Also, the volume control doesn't have to be turned very much for the set to quickly play very loud. I followed the schematic and replaced the capacitors one at a time. Also, I don't remember where it was connected to, but it looks like a previous repair had a .001 400v paper cap in the audio section. It wasn't shown on the schematic or parts layout in Ryders so I clipped out the capacitor. I wished I had made a note of where it was connected.

Would changing the .02 capacitor from the 50L6 plate to floating ground fix the tone issue? After that is completed, the set is going to need realignment as I replaced all caps in the RF and oscillator circuit in the same position the originals were in. The set has high pitch squeal when some stations are tuned in.

Does anyone know where to get a new volume control with the long shaft? The on/off switch is broken. Had to wire around it to test the set. If I can't get a replacement, I might have to just insert a line switch in the ac cord and be done with it.
#2

Yes the cap from the 50L6 plate (pin 3) to gnd will change the tone. The larger the cap the less highs you will have. You may be able to repair the switch or just replace the switch. If you end up replacing the whole control you can use one with short shaft. Just use a small piece of 1/4 rubber hose to couple a 1/4 rod to the shaft. Check your gnd connection at the volume control if it is open that can cause the volume to increase rapidly.
Terry

When my pals were reading comic books
I was down in the basement in my dad's
workshop. Perusing his Sam's Photofoacts
Vol 1-50 admiring the old set and trying to
figure out what all those squiggly meant.
Circa 1966
Now I think I've got!

Terry




Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
12' Philco
And here's a story about the tires on the truck. Same "no-stoop" guy must have installed these! Take care a...GarySP — 01:17 PM
Hickok AC51 tube tester
I think they have only shown the secondaries of the transformer. Two of them feed the rectifiers' filaments.morzh — 12:58 PM
IF can wire size and Rubber mounts?
Arran If the wire inside cans is the gauges you mentioned, the sole reason for that would be mechanical, to stiffen t...morzh — 12:56 PM
12' Philco
Rod, Yes, I know, but the Giant Philco is not around anymore either, so I go by whoever was alive fairly recently. H...morzh — 12:54 PM
Hickok AC51 tube tester
Absolutely no one is going to reverse engineer that circuit. Even the iron core is missing.RodB — 10:37 AM
IF can wire size and Rubber mounts?
Thanks to both members for your help regarding wire and tuner mtg supports. regards--Johngeorgetownjohn — 09:33 AM
Hickok AC51 tube tester
Note that no power cord, power switch, or power transformer switch are shown. That (along with my experience with full s...DaleHCook — 07:09 AM
IF can wire size and Rubber mounts?
A pair of wire strippers can give you an idea of what the existing gauge of the wire leads are in the IF can, I think it...Arran — 06:07 AM
My last cabinet for this year
Hello Dan, That is really beautiful what great looking radio you have ! I have friends who live in Calgary and the wea...radiorich — 01:51 AM
Philco Predicta Siesta picture over time getting dimmer
I found that the wire insulation was burnt.  The fly back needs corona dope! Why would someone put that there?Platinumblonde36 — 01:09 AM

[-]
Who's Online
There are currently 4976 online users. [Complete List]
» 1 Member(s) | 4975 Guest(s)
Avatar

>