On Sun, 21 Oct 2018 14:08:57 -0400, Ralph Mowery wrote:
In article , says...
A decade ago I'd have recommended doing that, but I don't think you can
buy Sprague Orange Drops anymore. They were the standard replacement
types for those applications for many many years. Now, I guess I would
suggest the Panasonic sputtered mylars from digi-key, or the xicon
sputtered mylars.
I was trying to use the "Orange Drops" as generic term. I probably have
some in the storage bin. Not sure if they are the Sprague or another
brand, but they are orange. Also many others that are similar in
construction and not the ceramic disk type.
I don't use ceramic caps in audio applications but I'm not sure I'd hear
the difference. It's just a matter of "good practice" for me. The old
Philco didn't sound perfect but it didn't sound really bad either. It
was 40 years old at the time and the fact that it then worked pretty well
was good enough for everyone involved.
I think any plastic film cap that has a suitable capacitance and meets or
exceeds the original's voltage rating would be fine. I have some old
paper caps but I'll never use them. Maybe I'll give them to some guitar
amp guy.
I have been working and collecting electronic parts for over 50 years so
have a fair stock for someone that is just in for the hobby and does not
work on them for a living. I just have never gotten into using other
than similar parts for replacment other than electrolytics for the old
oil filled capacitors and tublar ones for the old paper type. I can
work with the older tube equipment, but have not done very much of it as
transistors were in use by the time I really got into electronics. I
just started a Boat Anchor station back in July when I picked up a
Johnson Viking transmitter for $ 40. Now I have about $ 400 invested in
the AM station. It is from about the time I was born.
Sort of thinking about putting together a setup from aroung 1970 or so
using tube equipment. That would have been around the time I got my ham
license. Just out of room now in the ham shack.