tweeter plug - EH Scott Radio Enthusiasts2024-03-29T10:17:07Zhttps://ehscott.ning.com/forum/topics/tweeter-plug?feed=yes&xn_auth=noIf you intend to use an old t…tag:ehscott.ning.com,2020-05-20:3925821:Comment:765222020-05-20T11:52:22.452Zmike hadleyhttps://ehscott.ning.com/profile/mikehadley
<p>If you intend to use an old tube base, after breaking out the old glass, soak the base in denatured alcohol for a few hours or overnight, this will soften and dissolve the old cement that held the glass bulb in situ,</p>
<p>leaving a nice clean socket.</p>
<p>I think that isopropanol will work but will take a little longer, the cement is shellac based with binders in, could be pumice, fine sand or anything they had back then.</p>
<p></p>
<p>If you intend to use an old tube base, after breaking out the old glass, soak the base in denatured alcohol for a few hours or overnight, this will soften and dissolve the old cement that held the glass bulb in situ,</p>
<p>leaving a nice clean socket.</p>
<p>I think that isopropanol will work but will take a little longer, the cement is shellac based with binders in, could be pumice, fine sand or anything they had back then.</p>
<p></p> Thanks Dave for advice on how…tag:ehscott.ning.com,2020-05-20:3925821:Comment:767692020-05-20T11:08:28.750ZRichard Gromanhttps://ehscott.ning.com/profile/RichardGroman
<p>Thanks Dave for advice on how to proceed. Much appreciated.</p>
<p>Thanks Dave for advice on how to proceed. Much appreciated.</p> Be really tough to find that…tag:ehscott.ning.com,2020-05-20:3925821:Comment:765822020-05-20T01:43:20.329ZDavid C. Polandhttps://ehscott.ning.com/profile/DavidCPoland
<p>Be really tough to find that 2 pin plug. Suggest you make one.</p>
<p>Comparing a 6 pin tube (pre octal, era - like a 58) to the my Philly tweeter plug is about right.</p>
<p>The 6 pin tube has 2 fat pins and 4 thin pins. The Scott 2 pin plug has one fat and one thin pin.</p>
<p>Choose a dud or worn out tube. Separate the glass envelope from the tube base and unsolder the wires.</p>
<p>Keep one fat pin and the opposite thin pin and cut off the other 4 pins of the tube…</p>
<p>Be really tough to find that 2 pin plug. Suggest you make one.</p>
<p>Comparing a 6 pin tube (pre octal, era - like a 58) to the my Philly tweeter plug is about right.</p>
<p>The 6 pin tube has 2 fat pins and 4 thin pins. The Scott 2 pin plug has one fat and one thin pin.</p>
<p>Choose a dud or worn out tube. Separate the glass envelope from the tube base and unsolder the wires.</p>
<p>Keep one fat pin and the opposite thin pin and cut off the other 4 pins of the tube socket.</p>
<p>Assuming you have the Scott tweeters set of PM tweeters with the 2 mfd cap mounted on the one tweeter.</p>
<p>As for polarity, the Philly diagram suggests the fat pin is wired to the 2 MFD cap and other to thin pin/ground.</p>