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

Thread Closed
Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5

Philco 43 - Filter Choke
#2

I wouldn't use a resistor for a rf filter.
A choke will do a much better job. For now I'd leave 47 @ 8mf see what happens depending on what it's trying to do. It's either stopping noise from other circuits from getting into the osc or signals from the osc getting out of the osc. Common practice now days would be to use a small value cap across 47 like a .01 or .005. This most of the time will block the signals from getting out. The choke and large cap stops low frequency (audio,hum, and such) from getting in.
When you get it working and it doesn't want to settle down squealing and behaving badly add some more mfd's there.

When my pals were reading comic books
I was down in the basement in my dad's
workshop. Perusing his Sam's Photofoacts
Vol 1-50 admiring the old set and trying to
figure out what all those squiggly meant.
Circa 1966
Now I think I've got!

Terry


Messages In This Thread
Philco 43 - Filter Choke - by Masonparker - 02-13-2021, 06:16 PM
RE: Philco 43 - Filter Choke - by Radioroslyn - 02-13-2021, 06:43 PM
RE: Philco 43 - Filter Choke - by morzh - 02-13-2021, 09:07 PM
RE: Philco 43 - Filter Choke - by Masonparker - 02-21-2021, 08:08 PM
RE: Philco 43 - Filter Choke - by Radioroslyn - 02-21-2021, 08:49 PM
RE: Philco 43 - Filter Choke - by morzh - 02-21-2021, 10:43 PM
RE: Philco 43 - Filter Choke - by Masonparker - 02-22-2021, 09:14 PM
RE: Philco 43 - Filter Choke - by morzh - 02-22-2021, 10:06 PM
RE: Philco 43 - Filter Choke - by Masonparker - 02-22-2021, 10:12 PM
RE: Philco 43 - Filter Choke - by Masonparker - 02-22-2021, 10:15 PM
RE: Philco 43 - Filter Choke - by Masonparker - 02-22-2021, 10:59 PM
RE: Philco 43 - Filter Choke - by morzh - 02-22-2021, 11:22 PM
RE: Philco 43 - Filter Choke - by Masonparker - 02-23-2021, 07:58 PM
RE: Philco 43 - Filter Choke - by Radioroslyn - 02-23-2021, 08:36 PM
RE: Philco 43 - Filter Choke - by Masonparker - 03-18-2021, 06:52 PM
RE: Philco 43 - Filter Choke - by Radioroslyn - 03-18-2021, 07:12 PM
RE: Philco 43 - Filter Choke - by Masonparker - 03-19-2021, 06:44 PM
RE: Philco 43 - Filter Choke - by Masonparker - 03-19-2021, 06:49 PM
RE: Philco 43 - Filter Choke - by Masonparker - 03-19-2021, 07:13 PM
RE: Philco 43 - Filter Choke - by Radioroslyn - 03-19-2021, 10:24 PM
RE: Philco 43 - Filter Choke - by morzh - 03-19-2021, 11:06 PM
RE: Philco 43 - Filter Choke - by Masonparker - 03-20-2021, 08:34 PM
RE: Philco 43 - Filter Choke - by morzh - 03-20-2021, 09:37 PM
RE: Philco 43 - Filter Choke - by Masonparker - 03-21-2021, 09:42 AM
RE: Philco 43 - Filter Choke - by morzh - 03-21-2021, 12:05 PM
RE: Philco 43 - Filter Choke - by Masonparker - 04-10-2021, 10:47 AM
RE: Philco 43 - Filter Choke - by Radioroslyn - 04-10-2021, 01:56 PM



Users browsing this thread:
[-]
Recent Posts
The list of my radio & TV collection!
A little light Saturday positive about our hobby in our feed... My new every Saturday video about antique radio equipme...RadioSvit — 02:12 PM
Model 70 Cabinet Trim
musar , Well if you have any more questions feel free to post away . Sincerely Richardradiorich — 08:56 PM
Model 70 Cabinet Trim
Although I have not made any cabinets or cabinet parts for a couple of years, I still have some parts left over, includi...Steve Davis — 06:26 PM
philcorepairbench.com - shadow-meter
Thanks Ron. But I can't find those articles.fenbach — 02:43 PM
Model 70 Cabinet Trim
Thank you, Gary. Before making my original post, I had clicked on "Steve Davis Cabinets" only to find that it...musar — 02:25 PM
philco predicta
Welcome to the Phorum, cgl18! I am not your resource for television repair, but lots of friendly help is available here...GarySP — 02:12 PM
Model 70 Cabinet Trim
Welcome to the Phorum, musar! You can send Steve Davis a private message (PM). The site is at the top of the Home page...GarySP — 02:09 PM
Model 70 Cabinet Trim
How do I contact him? The only contact information for him I could find when searching online was a telephone number th...musar — 10:38 AM
philco predicta
Hello, good afternoon, I would like to ask what the possible problem could be if I don't have an image on the screen. I ...cgl18 — 10:19 AM
Philco model 38 code 121 not receiving signal.
So one last question before I finish this radio. Regarding the speaker and output transformer. I salvaged the original o...Stormlord5500 — 09:31 AM

[-]
Who's Online
There are currently 782 online users. [Complete List]
» 1 Member(s) | 781 Guest(s)
Avatar

>