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

R.F choke
#1

Ive actually got 2 questions on this topic. I think I read somewhere that a RF choke isn’t really needed today… Is that true or should I put one back in? Also, it’s a .2 MFD and the closest cap I have is a .05 MFD so, should I install that in its place?
#2

I think you should a couple of .1 use two in parallel (=.2mfd). No you don't need to recreate the coil around the .2 cap.

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
#3

Unfortunately the container holding the caps fell off my table and spilled a few weeks ago and thought for sure I found all of them but apparently not because I’m missing the 3 .1’s you gave me and the .15. I’m a little frustrated at the moment at myself because you were so kind to send me them for nothing and I’ve gotta order them because
#4

I did manage to find 3 .1 caps, I forgot they were marked 304K. I’m at a loss of where the other 2 are since they’re so big. So I ordered 2 of those and the .015 I’m missing
#5

Why wouldn't an RF choke be needed today?

The RF chokes found in the antenna circuit, to filter out 455khz aren't needed (mostly). But the chokes used to keep RF out of an amplifier are still useful.

"I just might turn into smoke, but I feel fine"
http://www.russoldradios.com/
#6

I’m not talking about a amp though
#7

Terry, 

Where does the other end of it go. One lead goes to 7C6 according to my pics (I’m not trying to map things out on the schematic because it’s mostly hard for me to follow.  I tried but my learning disability is fighting me) but, the other lead is missing totally. (Still trying to figure out why some of them had missing 2nd leads and others didn’t but that could explain partly why the previous owner got the pilot light to light but the radio didn’t make any noise
#8

In this case I was referring to any tube/stage that provides signal gain and might amplify unwanted RF.

"I just might turn into smoke, but I feel fine"
http://www.russoldradios.com/




Users browsing this thread: 2 Guest(s)
[-]
Recent Posts
Atwater-Kent 84, restoration.
Hello Mike, Wow ! far as my AK it does work and the cabinet is in nice shape so is my chassis anyway here is a photo of...radiorich — 02:59 AM
Atwater-Kent 84, restoration.
Nice radio, Mike! Here's hoping it was well rebuilt. Take care and BE HEALTHY! GaryGarySP — 12:12 AM
Atwater-Kent 84, restoration.
Rich yes, this is the way I got it. I have just put it on the table and took it apart. I suspect it even might work,...morzh — 11:31 PM
Atwater-Kent 84, restoration.
Hello mike, What nice looking radio I have one AK in my collection it's a console I have not started restoring it yet ....radiorich — 11:21 PM
91H Code 126 Restore
Just to make it more confusing here is another model 91 schematic that doesn't show parts with dotted lines in that spot...Arran — 10:37 PM
Atwater-Kent 84, restoration.
The wires were desoldered from the can, and the capacitors checked. All checked at 0.102 uF, which is correct. So the c...morzh — 09:41 PM
An attempt to remove the Field Coil from a G speaker
Arran Yours probably then the H speaker, same as mine.morzh — 08:39 PM
An attempt to remove the Field Coil from a G speaker
Mike; I would like to have a look at the speaker in my model 96, but the set is packed into a corner in the basement. ...Arran — 08:04 PM
91H Code 126 Restore
Thanks Arran, I'm convinced the power cord is good but have a nice repro plug for it. Would it be prudent to add a fus...RealRider — 07:28 PM
91H Code 126 Restore
As I was studying this schematic I was wondering what does this dotted line means?  I haven't traced it out yet. An o...RealRider — 07:22 PM

[-]
Who's Online
There are currently 2578 online users. [Complete List]
» 1 Member(s) | 2577 Guest(s)
Avatar

>