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 46-1203 Turntable Question
#1

Hi

Turn table question. The three wires to the record cartridge, black, red and a braided shield around the wires. The braided shield is not connected to anything and seems as if it should be soldered to something. What is your advise. Thanks.

God bless,

Dave b.

(subject edited by site admin to eliminate confusion)
#2

Hi,

The red wire would be the "signal" or "hot" lead, the black would be "common", (sometimes referred to as ground) and the braid
is often "grounded" to the chassis / frame at the end going into
the radio/amplifier.
Sometimes the braid is left unconnected at the cartridge end.
Just need to be sure it doesn't touch the red wire/terminal or
it will just kill (short out) the cartridge signal. It is also possible
that it could be conneted to the arm itself if metal or in some
cases may also be connected to the black wire or terminal altho
least likely. It mainly acts as a "shield" to reduce or eliminate
pickup by the hot wire of stray signals or noise that would cause
interference in the sound.
Again, since I am new to some of the methods used "way-back",
I'm not totally sure and someone else may have a better answer
for you. The main point is that initially it won't matter if the braid
is not connected at the cartridge end. If things work with good
volume but you have some other noise or hum with it, then the
braid may need to be just connected to the black or metal of
the arm. Hope this helps!
Best regards,
Harlan
#3

Ditto what Harlan said. The shield should be connected to ground inside the radio chassis itself.

--
Ron Ramirez
Ferdinand IN




Users browsing this thread:
[-]
Recent Posts
Philco Model 38-7: what caps & resistors do fail typically?
Yep the dim bulb test is OK but I'd definitely replace all those electrolytics before I did it. Since those #47 conden...klondike98 — 09:18 PM
Philco 42-345 Restoration/Repair
The resistor is a 2.2 Meg, it was the last one I hadn't replaced. The broadcast is coming in after replacing it.osanders0311 — 09:09 PM
Philco 42-345 Restoration/Repair
What does the resistor measure? I think it should be 3.3 Meg. If the oscillator coil has continuity and the resistanc...RodB — 09:03 PM
Philco Model 38-7: what caps & resistors do fail typically?
Good idea to check the coils... then I'll get hold of an incadescent light bulb and see what happens when the unit is sw...Musaeum — 08:49 PM
Philco 42-345 Restoration/Repair
I have that same set, ain't too much shortwave I like anyway.....it is a good AM DX set. PaulPaul Philco322 — 08:32 PM
Philco Model 38-7: what caps & resistors do fail typically?
Welcome to the Phorum, Martin! Open a new thread in Philco Electronic Restoration when you begin working on your 38-7. ...GarySP — 08:28 PM
Philco Model 38-7: what caps & resistors do fail typically?
Welcome to the Phorum! :wave: Here's the schematic for that radio from our digital library: Something to do bef...klondike98 — 08:05 PM
Philco Model 38-7: what caps & resistors do fail typically?
Hi all, on vacation in Montreal,  a friend of mine showed me a Philco Model 38-7 console radio from the 30ies. Mechan...Musaeum — 07:21 PM
Part numbers to model cross
I looked thru the documents and did not see one. Might have missed it though.Jim Dutridge — 07:16 PM
Philco 42-345 Restoration/Repair
Please tell me this was it, I replaced resistor 27 and it's playing on the broadcast band. I am afraid to change the ban...osanders0311 — 06:12 PM

[-]
Who's Online
There are currently 1105 online users. [Complete List]
» 2 Member(s) | 1103 Guest(s)
AvatarAvatar

>