"Cool tubes" reminds me of an old friend who even though is silent key, I will not say his name or call. I had a lot of respect for the gentleman but this was classic. He had wound a very nice ultra large modulation XFMR and it worked wonderful but was prone to talk back. K5SWK suggested that he submerge it in oil so our friend purchased a large Styrofoam ice chest and put the XFMR in it and filled it with oil. The acoustical damping was great but the oil would seep through the Styrofoam and leak on to the wooden garage floor. The floor was old and not too good so he really didn't mind too much. He just added more oil. Later he put in a wooden dipstick. We all wondered how many transmissions he got to the quart.
John
