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

dogbone resistor value
#1

This may seem like a dumb question for all you Philco techs, but here goes anyway.
Working on a Philco model 118 code 121 chassis and noticed a large dogbone resistor that has a couple hot spots(bubbled).
It is a large dogbone, I am guessing at least 3 watt,with an orange body and red end. No dot in the center.
The schematics does not show this resistor, so I will just replace it with a new one if I can figure out what it is.
Checks about 46.9 k ohms.
Thanks guy's,
murf
#2

Murf,

Well, so far you have described ' 32? '. THe question is what was the DOT. (Body-tip-dot)

If the schematic doesn't show it, what DOES it show at that place in the circuit? Does the radio WORK as it is? Have you tried simply removing it and see if it works that way?

My point is, if the part was not intended to be there, why IS it there. If it came to be as a repair, replaceoing another resistor that failed, and it currently works, I would do one of two tings. (A), I'm lazy. Leave it alone. (B) if some improvement can be had, a good place to start would be 32 K Ohms. Check for heating. If the one that's there gets HOT, there might be a shorted or leaky capacitor on the other end of it. Replacing it with 32 anything might resilt in smoke. BTW... Those resistors were half Watt, one Watt, 2 Watt. The two Watters were BIG. Quarter inch in diameter, and about 2 inches long.

It would help if I knew where it is in the circuit.

Randy.......
#3

Murf,
Believe you are looking at R67; 32K, 2 watts. Cap on output side going to the grids of the 6A7 is probably bad. Therefore, the reason the resistor got hot. John
#4

Well guy's, one end of the resistor is going to the output tranny and the other end to a bakelite block.
Don't see it on the schematics.
No dot that I can see.
I know the electrolitics are bad due to the buzz.
Have not wanted to power it up until the electrolitics are replaced.
Just going by what the previous owner said.
I gather I should start with a 32k and see what happens after I replace the electrolitics.
I noticed there is a can underneath with a 1-1-2 cap installed.
Need to replace these too?
Thanks
murf
#5

B.E.D. Body, end, dot. just in case you run into another one, if there is no dot then it would be the same color as the body. If the body is orange without a dot then the dot is orange also.




Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
Philco 60 Squealing
I seem to remember eliminating a squeal by changing the IF frequency by a few KHz. Not that you should put too much tru...fenbach — 08:48 PM
Philco 42-390, code 121 speaker
These speakers pop up on eBay regularly, even if at bloated prices. Honestly, have not seen many parts on swapmeets.morzh — 08:38 PM
Philco 38-7 Speaker
The put-put is not like the speaker problem.morzh — 08:29 PM
Mission Bell Model 19A Car Radio
Hello everyone,  As mentioned in my last post I was going to see if the vibrator / rectifier section could be persuaded...Antipodal — 08:21 PM
Philco 60 Squealing
Wondering if I did it backwards. If a coil was wound backwards, the oscillator would not work at all. Old school...Chas — 07:23 PM
Philco 38-7 Speaker
4-ohm speaker. Black, Green leads.tludka — 07:00 PM
Philco 42-390, code 121 speaker
#87 on the schematic.  This radio had a 8" Zenith  speaker attached to it when I got it. I do don't know the hist...Stevelog — 06:39 PM
Philco 60 Squealing
I'm pretty sure I now have the litz wire soldered. This did not make any difference. Back in April I rewound the seconda...dconant — 06:25 PM
Philco 38-7 Speaker
Just to make sure, you chose either 4 ohm into 5K or into 10K? (blk-org or blk-grn)morzh — 06:23 PM
Philco 38-7 Speaker
I have let this one sit because of other duties. Now I am back, and I have a couple of questions. I hooked up a Hammond ...tludka — 05:34 PM

[-]
Who's Online
There are currently 4815 online users. [Complete List]
» 1 Member(s) | 4814 Guest(s)
Avatar

>