03-02-2012, 05:15 PM
Hello, Marv: I just happen to be working on a 37-660 right now, which is very similar to your 665.
Caps #60 and #68 are .003mFd, 1000V rated caps. Rather than take a chance with my poly 630V caps, I ordered some .0033/1600V replacements. I don't think you need to go any higher than 1000V, but the 1600Vs were available to me so I went with them.
The rest of your paper caps should be fine replaced by the 600/630V varieties offered by many vendors. Your electrolytics should be fine replaced by 450V varieties. NOTE that in addition to the two 8mFd electrolytics located near the power transformer, you also have a small electrolytic can on the RF deck that houses 1, 2, and 3mFd caps. I strongly recommend you replace these, as all 3 are in contact with B+.
In order to replace the can and the paper caps in/on the RF deck you will have to remove the deck to get at them. This is not a simple task. Make sure you diagram and mark the wires as you de-solder them.
Caps #60 and #68 are .003mFd, 1000V rated caps. Rather than take a chance with my poly 630V caps, I ordered some .0033/1600V replacements. I don't think you need to go any higher than 1000V, but the 1600Vs were available to me so I went with them.
The rest of your paper caps should be fine replaced by the 600/630V varieties offered by many vendors. Your electrolytics should be fine replaced by 450V varieties. NOTE that in addition to the two 8mFd electrolytics located near the power transformer, you also have a small electrolytic can on the RF deck that houses 1, 2, and 3mFd caps. I strongly recommend you replace these, as all 3 are in contact with B+.
In order to replace the can and the paper caps in/on the RF deck you will have to remove the deck to get at them. This is not a simple task. Make sure you diagram and mark the wires as you de-solder them.
