Is there a replacement for this type of capacitor
Hello @wjim4221,
My best guess is that these are high quality paper-in-oil capacitors. The OEM could have used conventional capacitors such as the green film capacitor in your picture. However, they chose to use something special in this application.
If I am correct, direct replacements are not available. While there are some modern reproductions, they tend to be used for higher voltage vacuum tube equipment. You could always use modern film capacitors - again, I recommend you leave them in place unless they are defective.
Do you have any ideas @PaulHutch .
Best wishes,
APDahlen
P.S. Out of curiosity, what is the application. Quality was obviously important given the high-quality consitruction of the potentiometer.
This is out of a vintage Garrett metal detector high quality old school sure would like to fix it I’m a rookie in the capacitor and resistor field sure is interesting I appreciate any feedback on being able to fix this this field has intrigued me I’m going to spend all my time investigating and trying to learn all I can about resistors capacitors and the rest of it very intriguing it’s hooked me thank you again for your feedback
Very nice, @wjim4221.
Is this one of the green colored units from the 1970s?
I wish you success in repairing the unit. Recommend you explore the 'net and see if you can find a Garrett enthusiast group. There may be a few experts with deep knowledge of the vintage equipment.
Hopefully they can provide tips and schematics.
Best wishes,
Aaron
Seeing the metal can RCA Op-Amp made me think this is a late 60s early 70s design.
That makes it very likely that the oil filled caps where used just for price/convenience given the available film capacitors of that time.
I’d slap in any film type capacitor that is 0.15uF, 10%, 200V or more, this would be the one I’d try first.
It’s also very likely the 200V is way overspecified, we currently ship a product designed in the mid-60s that originally used 200V film caps when only 10V is needed. The design stayed that way for 15 years because 200V film caps were more convenient to obtain.
1 Like
Very interesting some really good information thank you so much for your experience and advice I’m ordering it as we speak
I think I should replace those film caps you could give me the parts number of what you think that should be replaced with this is a Garrett deepseeker metal detector thank you for your kindness and you’re smarts
The part I linked in my other post is the one I’d try.
It’s cheap and while it will look completely different because it’s tiny, you should be able to make it fit on the PCB by bending the leads.
2 Likes
Are these resistors bad when they have cracks like this if so could you possibly send me a parts number so I can buy them thank you
Unfortunately the color bands are faded away on those cracked resistors, so there is no way to know what value they are.
You will need to get a service manual/schematic diagram for the equipment to find out the value.
2 Likes
If you can verify the color bands on those faded ones we do have a color band calculator: Resistor Color Code Calculator - 4 band, 5 band, 6 band | DigiKey Electronics
Hello @wjim4221,
Please let us know the model number of your Garrett detector.
No promises, however, we may be able to locate a schematic which would help answer the capacitor and resistor questions.
r/
APD