Welcome Guest! Be sure you know and follow the Phorum Rules before posting. Thank you and Enjoy! (January 12, 2025) x

Thread Closed

Philco 41-280 60 cycle hum problem Need Help
#3

I am only just learning myself and am by no means an expert, so please take what I say with a grain of salt....

From what I understand, the rule of thumb is that any electrolytic condenser that meets or exceeds the capacitance (uf) and voltage (v) rating is fine, and for other condensers the ratings should be as called for in the schematics or exceed by less than 20%. (Someone please correct me if I'm wrong!) In other words, I don't believe that the problem is with the existing condenser ratings.

I'd suspect that there is an open in one of the condensers (which would be odd considering that they all look new in the pics as far as I can see on my screen) or maybe that there is a ground issue?

I'm interested to hear what others have to say so I can learn from this one myself! Icon_biggrin


Messages In This Thread
Re: Philco 41-280 60 cycle hum problem Need Help - by jeremyfries - 07-01-2010, 12:37 PM



Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
HiFi (Chifi) tube amp build - but my own design.
It's the other forum. I'm also in DIY, but mostly read there. Honestly, I kinda jumped into this without much thought to...TV MAN — 10:43 AM
Philco 71 Code 125
Hello,  I am in need of a schematic for this radio. Mine has the three separate circular tube shields and a shadow me...dconant — 08:06 AM
Stromberg Carlson 1500 Squeal
And life just keeps getting more complicated.dconant — 07:57 AM
54C Complete Teardown/Rebuild
Hello Roy, here is this one sincerely Richardradiorich — 12:45 AM
54C Complete Teardown/Rebuild
Richard, Had grabbed it already but thank you just the same.  I find myself wanting to find some way to block out the...glyphmon — 12:03 AM
54C Complete Teardown/Rebuild
Hello roy, here is a link to the schematic . Sincerely Richardradiorich — 11:54 PM
54C Complete Teardown/Rebuild
Richard, The Silvertone 2014 also is a transformerless set, so I am incorporating a 1:1 600 ohm audio isolation transfo...glyphmon — 11:37 PM
Preliminary work on wife's Silvertone 2014
Did an alignment today which was interesting.  IF alignment went great, almost all was already spot-on.  Adjusting on th...glyphmon — 11:35 PM
54C Complete Teardown/Rebuild
The main problem with adding a Bluetooth input is that this set lacks a traditional power transformer to isolate it from...radiorich — 11:19 PM
54C Cabinet Refinish
I started stripping this cabinet before it got super chilly out because I knew I wasn't going to be able to work on ...glyphmon — 11:18 PM

[-]
Who's Online
There are currently no members online.

>