EH Scott Radio Enthusiasts

The Fine Things are Always Hand Made

Robert Feenstra
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  • Allendale, MI
  • United States
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Scott 16A capacitors

Started this discussion. Last reply by Robert Feenstra Jan 30. 6 Replies

While I wait for some re-chroming to get finished on my Scott 16, I decided to start on my 16A.Question: There are a LOT of Tobe and Sangamo molded capacitors in this thing.  What are they, Mica or…Continue

New member - Scott 16

Started this discussion. Last reply by David C. Poland May 1. 75 Replies

 I just got into this fascinating hobby.  Just redid a couple of radios I grew up with - a Majestic 1941, and Philco Model14 - 1933, chassis only. Now working on a Philco 96, 1930.  I decided I…Continue

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Latest Activity

David C. Poland replied to Robert Feenstra's discussion New member - Scott 16
"Sorry no. Used that cover on another Scott"
May 1
Robert Feenstra replied to Robert Feenstra's discussion New member - Scott 16
"The biggest problem I had on this transformer was keeping the thickness of the core slim enough to fit back in the E sections.  They, evidently, could wind them tighter than I can.  I had to do a little squeezing to get the laminations…"
May 1
David C. Poland replied to Robert Feenstra's discussion New member - Scott 16
"Cool. And it fit back in the mounting bracket."
May 1
Robert Feenstra replied to Robert Feenstra's discussion New member - Scott 16
"Transformer re-wound.  Thanks David and Mike for your help. Can't really test it till the radio is finished, but all dc resistances are good. "
Apr 30
Robert Feenstra replied to Robert Feenstra's discussion New member - Scott 16
"Thanks Mike!  Excellent info."
Apr 27
David C. Poland replied to Robert Feenstra's discussion New member - Scott 16
"Mike - thanks for additional insight. Explains the good solid sound of my other "lesser" Scott models using 6V6's, this speaker and output transformer - my Super 12 and my 14 tube Scott Masterpiece  sound really good with an FM…"
Apr 27
mike hadley replied to Robert Feenstra's discussion New member - Scott 16
"splitting the winding's in the output transformer has a lot to do with residual inductance, a bit like a lossy capacitor, not doing this will play havoc with the frequency response, transformers being made from iron will change their inductance…"
Apr 27
Robert Feenstra replied to Robert Feenstra's discussion New member - Scott 16
"David, as I unwound the primary, several times the wire either broke or was broken. I assume that it was corrosion (though I could not see it) or the wire had just deteriorated.  Most of the breaks were on the outside 2 layers.  Perhaps…"
Apr 27
mike hadley replied to Robert Feenstra's discussion New member - Scott 16
"It's all about compromise, there is a trade off between wire gauge length etc, but the turns ratio wins out, I think that if you measure the inductance you will find that they are similar, within a few percent, there is that trade off…"
Apr 27
David C. Poland replied to Robert Feenstra's discussion New member - Scott 16
"That would also explain why the DC resistance of the the two halves of the primary differ a bit on resistance. Curious the nature of the failure of the primary. Bad solder joint? corrosion? broken wire?"
Apr 26
Robert Feenstra replied to Robert Feenstra's discussion New member - Scott 16
"Output transformer question for those of you more technically inclined.  David kindly provided an original output transformer with an open primary for my Scott 16.  I've rewound several transformers and am in the middle of this…"
Apr 26
Robert Feenstra replied to Robert Feenstra's discussion New member - Scott 16
"No, the spring goes down into the brass portion and pushes on the end of the steel part.  Right now the spring is pushing directly on the shaft, so it's not a good bearing.  Putting a ball in between will complete the assembly and…"
Apr 22
mike hadley replied to Robert Feenstra's discussion New member - Scott 16
"Robert; if that's your first attempt, wow congratulatios. I have been making wooden knobs over the weekend, will start another thread  Mike"
Apr 22
Robert Feenstra replied to Robert Feenstra's discussion New member - Scott 16
"Ta da... it works.  I just need to find a ball bearing for the spring.  In the mean time,  it is assembled and working almost as good as new.  This was kind of fine work for my lathe and my bits left things a little rough (I know…"
Apr 22
mike hadley replied to Robert Feenstra's discussion New member - Scott 16
"It's not very clear in the photo but there are three ball bearings in the brass shaft, the old grease had set hard and made  the whole assembly really difficult to get apart, the center shaft has a conical end that the three balls run on,…"
Apr 22
Robert Feenstra replied to Robert Feenstra's discussion New member - Scott 16
"No question that the center shaft is missing.  My setup is just a bit different than yours as there are 3 ball bearings that engage the center shaft.  I would assume that I am missing one ball bearing that the spring pushes against that in…"
Apr 22

Comment Wall (1 comment)

At 7:10am on January 7, 2018, Joseph W Strickland said…

Robert;

You are doing a great job on your 16! I too am amazed at the reduction in size of modern electrolytics. Lately I have been working on some Fisher tuners from the early 1960s. I am able to find high voltage rated individual electrolytics that easily fit inside the typical size multi-section electrolytics used in those products. Mike Hadley has an excellent thread on making the dogbone resistors and also making replacement bezels. Of course if you can find someone who has already reproduced the one you need, go for it. It is encouraging to others to see how well many of these radios are being restored!

Keep us updated.

Joe

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