Hello All,
This is in a Philco 37-610. I am supposed to have 110pf capacitors. Two are marked yellow-brown-blue. This makes no sense. That would be 41,000,000 pf or 41 microfarads. Is there another color code for molded capacitors? The only other one I know of is with two dots on each side. This is definitely not the case. These are three color dots along an arrow, just the way they're supposed to be.

If anyone wants, I will post a picture of them. (Where can I do that?)
If anyone can help, please do. Otherwise, I'm replacing them.

Thanks,

Dave...

:Hello All,
:This is in a Philco 37-610. I am supposed to have 110pf capacitors. Two are marked yellow-brown-blue. This makes no sense. That would be 41,000,000 pf or 41 microfarads. Is there another color code for molded capacitors? The only other one I know of is with two dots on each side. This is definitely not the case. These are three color dots along an arrow, just the way they're supposed to be.
:

All the Philco mica cap info you need is here on my site:

http://www.philcorepairbench.com/micacap.htm

Chuck Schwark
The Philco Repair Bench
:If anyone wants, I will post a picture of them. (Where can I do that?)
:If anyone can help, please do. Otherwise, I'm replacing them.
:
:
:Thanks,
:
:Dave...

:Hello All,
:This is in a Philco 37-610. I am supposed to have 110pf capacitors. Two are marked yellow-brown-blue. This makes no sense. That would be 41,000,000 pf or 41 microfarads. Is there another color code for molded capacitors? The only other one I know of is with two dots on each side. This is definitely not the case. These are three color dots along an arrow, just the way they're supposed to be.
:
:If anyone wants, I will post a picture of them. (Where can I do that?)
:If anyone can help, please do. Otherwise, I'm replacing them.
:
:
:Thanks,
:
:Dave...

Dave,

Mica caps usually do not have to be replaced - they rarely go bad. It's the wax-paper, bakelite block and metal-can caps that you must replace.

Chuck

Chuck,
I know this. I'll look on your site again. But I don't think I am going to find that Yellow, brown, blue adds up to 110.

Thanks,

Dave...

::Hello All,
::This is in a Philco 37-610. I am supposed to have 110pf capacitors. Two are marked yellow-brown-blue. This makes no sense. That would be 41,000,000 pf or 41 microfarads. Is there another color code for molded capacitors? The only other one I know of is with two dots on each side. This is definitely not the case. These are three color dots along an arrow, just the way they're supposed to be.
::
::If anyone wants, I will post a picture of them. (Where can I do that?)
::If anyone can help, please do. Otherwise, I'm replacing them.
::
::
::Thanks,
::
::Dave...
:
:Dave,
:
:Mica caps usually do not have to be replaced - they rarely go bad. It's the wax-paper, bakelite block and metal-can caps that you must replace.
:
:Chuck

Chuck,
This set has zero reception. Amplifier is quite alive and so is the detector. I have replaced all paper and filter capacitors. I have checked all voltages and they are correct. All resistors are correct. Everything is connected to where it's supposed to be connected to. No coils are open. Tubes are all good. I have tried to get to the band switch the best I can to clean it, although it seems to be OK. There are no plates in the tuning capacitor that are touching. Where do I look next?
This is extremely frustrating.

Thanks,

Dave...
Philco 37-610 Code 125
I have the service data.

::Hello All,
::This is in a Philco 37-610. I am supposed to have 110pf capacitors. Two are marked yellow-brown-blue. This makes no sense. That would be 41,000,000 pf or 41 microfarads. Is there another color code for molded capacitors? The only other one I know of is with two dots on each side. This is definitely not the case. These are three color dots along an arrow, just the way they're supposed to be.
::
::If anyone wants, I will post a picture of them. (Where can I do that?)
::If anyone can help, please do. Otherwise, I'm replacing them.
::
::
::Thanks,
::
::Dave...
:
:Dave,
:
:Mica caps usually do not have to be replaced - they rarely go bad. It's the wax-paper, bakelite block and metal-can caps that you must replace.
:
:Chuck

:Chuck,
: This set has zero reception. Amplifier is quite alive and so is the detector. I have replaced all paper and filter capacitors. I have checked all voltages and they are correct. All resistors are correct. Everything is connected to where it's supposed to be connected to. No coils are open. Tubes are all good. I have tried to get to the band switch the best I can to clean it, although it seems to be OK. There are no plates in the tuning capacitor that are touching. Where do I look next?
: This is extremely frustrating.
:
:Thanks,
:
:Dave...

Sounds like an open RF or osc or IF coil or coils. Check all the coils for continuity.

Chuck

Chuck,
That's what's so odd. I can't find anything open. However, there is a large mica capacitor in the bottom of the oscillator section. When I measure across it I get zero ohms. It isn't the capacitor because I read the same thing with it out of the circuit. Looking at the schematic, I cannot find anything that could make the resistance zero like that.
On further study I find that the RF unit I have in front of me is different from both code 121 and code 125. If you look at service bulletin 249B it clearly shows parts 10 and 14 connected to the cathode of the 6A8. No such parts are in the set in front of me. The cathode is connected directly to the chassis. The schematic shows that the first IF transformer, part 21, has the extra winding (long and short black wires). So does the chassis I have in front of me. So this set seems to be a cross between the code 121 and code 125. However the IF transformer numbers don't match any of the service data I have. The band switch has 4 wafers like the code 121 but the two bakelite capacitors like the 125, making this a very odd set. Maybe someone swapped the IF units at one time because this one had problems. I cannot find anything open, however, I do find zero ohms across the large mica capacitor which isn't in any diagram. It's near the trimmer cap known as part 13 in service bulletin 249b on the first page in thr RF Unit parts diagram. This is not part 8 because that's near part 9 in the diagram. If Iook in there I see another metal mica capacitor but it's smaller in size. Can I e-mail you a picture of this wierd Philco 37-610?

Thanks,

Dave...
::Chuck,
:: This set has zero reception. Amplifier is quite alive and so is the detector. I have replaced all paper and filter capacitors. I have checked all voltages and they are correct. All resistors are correct. Everything is connected to where it's supposed to be connected to. No coils are open. Tubes are all good. I have tried to get to the band switch the best I can to clean it, although it seems to be OK. There are no plates in the tuning capacitor that are touching. Where do I look next?
:: This is extremely frustrating.
::
::Thanks,
::
::Dave...
:
:Sounds like an open RF or osc or IF coil or coils. Check all the coils for continuity.
:
:Chuck