11-16-2018, 08:36 PM
Been working up an Echophone S-4. It's a 1930 6-tube TRF. I have one filter cap to replace with an electrolytic and I can't decide on the proper positive-negative orientation. Actually, I made that decision and soldered in the electrolytic, but I don't want to find out that I was wrong.
It's the 2 uF cap circled here: If this isn't legible, a direct link is: https://flic.kr/p/2cWipKg
[Image: https://farm5.staticflickr.com/4908/4590...9d10_c.jpg]
Now, the Show & Tell. I bought some DIY water slide decal paper a few years ago. I've used it successfully a few times, but this is the application that I originally envisioned. The dial face of the Echophone is rather...ugly. I masked and repainted it:
[Image: https://farm5.staticflickr.com/4901/4408...8988_z.jpg]
Printed a decal for the full length of the 0-100 numbering. Cut the finished decal into three sections for easier application. When the decal dried, I coated it with clear enamel.
[Image: https://farm5.staticflickr.com/4861/4590...de02_z.jpg]
Ta-dah! Couldn't have turned out better if I'd done it myself. Hope this can help someone some day.
Thanks for the advice on the electrolytic capacitor placement.
- Henry
It's the 2 uF cap circled here: If this isn't legible, a direct link is: https://flic.kr/p/2cWipKg
[Image: https://farm5.staticflickr.com/4908/4590...9d10_c.jpg]
Now, the Show & Tell. I bought some DIY water slide decal paper a few years ago. I've used it successfully a few times, but this is the application that I originally envisioned. The dial face of the Echophone is rather...ugly. I masked and repainted it:
[Image: https://farm5.staticflickr.com/4901/4408...8988_z.jpg]
Printed a decal for the full length of the 0-100 numbering. Cut the finished decal into three sections for easier application. When the decal dried, I coated it with clear enamel.
[Image: https://farm5.staticflickr.com/4861/4590...de02_z.jpg]
Ta-dah! Couldn't have turned out better if I'd done it myself. Hope this can help someone some day.
Thanks for the advice on the electrolytic capacitor placement.
- Henry