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

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

Atwater-Kent 84, restoration.
#27

So...

4 out of 5 resistors in the resistor section were too much off, so I had to fix it.


I opened up the caps, removed the rod, and then parallelled the proper value resistor to them. Pretty much using them as solder posts.
   

Then I soldered them back (the caps were already soldered and re-soldered to, so they are abut ugly) and, after having manufactured the insulating pressing gaskets from fishpaper (there was one original, but it was brittle, and I need two with extra resistors soldered) I put the back.

   


Then I eventually powered the radio up, and heard nothing but hum. The signal from the generator would not come through. Neither IF, nor the BC frequency.
The oscillator was fine, and the rest of everything checked out fine.
Then I put the scope on the 2nd detector Grid cap...it showed good signal when the radio was tuned to the frequency. All of a sudden the modulating beep slowly rose up and the signal became large.
I was able to tune the local station.
Then I removed the scope clip from the Grid cap, and the signal slowly faded away.

I am not sure what I did, but eventually the signal stayed.

So I removed the tubes, took Qtips, D5, and cleaned every single tube socket pin and tightened those that I thought were too wide.
Will let it dry and retry tomorrow.

The signal has some distortion. There could be two reasons:

1. The AK uses Plate detector
2. The speaker has been repaired (the cone), and the adhesive seems to be tar. I might procure a newer speaker or send this one for being re-coned.

People who do not drink, do not smoke, do not eat red meat will one day feel really stupid lying there and dying from nothing.


Messages In This Thread
Atwater-Kent 84, restoration. - by morzh - 02-22-2025, 05:48 PM
RE: Atwater-Kent 84, restoration. - by morzh - 02-22-2025, 09:41 PM
RE: Atwater-Kent 84, restoration. - by radiorich - 02-22-2025, 11:21 PM
RE: Atwater-Kent 84, restoration. - by morzh - 02-22-2025, 11:31 PM
RE: Atwater-Kent 84, restoration. - by GarySP - 02-23-2025, 12:12 AM
RE: Atwater-Kent 84, restoration. - by radiorich - 02-23-2025, 02:59 AM
462ron - by 462ron - 02-23-2025, 10:22 AM
RE: Atwater-Kent 84, restoration. - by jrblasde - 02-23-2025, 10:50 AM
RE: Atwater-Kent 84, restoration. - by morzh - 02-23-2025, 11:12 AM
RE: Atwater-Kent 84, restoration. - by radiorich - 02-23-2025, 11:25 AM
RE: Atwater-Kent 84, restoration. - by morzh - 02-23-2025, 06:02 PM
462ron - by 462ron - 02-24-2025, 09:10 AM
RE: Atwater-Kent 84, restoration. - by morzh - 02-24-2025, 12:16 PM
RE: Atwater-Kent 84, restoration. - by morzh - 02-24-2025, 12:29 PM
462ron - by 462ron - 02-24-2025, 04:14 PM
RE: Atwater-Kent 84, restoration. - by morzh - 02-24-2025, 04:51 PM
RE: Atwater-Kent 84, restoration. - by morzh - 02-24-2025, 10:21 PM
RE: Atwater-Kent 84, restoration. - by morzh - 02-25-2025, 08:24 PM
RE: Atwater-Kent 84, restoration. - by radiorich - 02-25-2025, 09:15 PM
RE: Atwater-Kent 84, restoration. - by Arran - 02-26-2025, 02:29 AM
RE: Atwater-Kent 84, restoration. - by morzh - 02-26-2025, 09:11 AM
RE: Atwater-Kent 84, restoration. - by morzh - 02-27-2025, 08:56 PM
RE: Atwater-Kent 84, restoration. - by radiorich - 02-27-2025, 09:38 PM
RE: Atwater-Kent 84, restoration. - by morzh - 02-27-2025, 09:44 PM
RE: Atwater-Kent 84, restoration. - by radiorich - 02-28-2025, 12:18 AM
462ron - by 462ron - 02-28-2025, 08:44 AM
RE: Atwater-Kent 84, restoration. - by morzh - 03-01-2025, 08:48 PM
RE: Atwater-Kent 84, restoration. - by morzh - 03-02-2025, 02:42 PM
RE: Atwater-Kent 84, restoration. - by morzh - 03-03-2025, 09:33 PM
RE: Atwater-Kent 84, restoration. - by morzh - 03-04-2025, 07:48 PM



Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
Philco model 38 code 121 not receiving signal.
Thanks Arran. Yeah this plastic is pretty thin. It's a little thinner than the original stuff. It kinda reminds me of p...Stormlord5500 — 04:37 PM
Testing a speaker and output transformer Trutone A2-G
The equivalent of one short turn is basically the same as that of a shorted load. If it is the primary's turn, then the ...morzh — 03:53 PM
Testing a speaker and output transformer Trutone A2-G
I've never had an output transformer become shorted, the failure mode is usually an open primary, or in a center tapped ...Arran — 03:52 PM
Philco model 38 code 121 not receiving signal.
As long as the plastic sheeting isn't too thick, I think that the thickness of photographic film would be just about rig...Arran — 03:19 PM
Philco model 38 code 121 not receiving signal.
Well why not! :lol:Stormlord5500 — 03:14 PM
Philco model 38 code 121 not receiving signal.
Good luck next thing you know you will be winding coils just for the fun of it. DavidDavid — 11:29 AM
Testing a speaker and output transformer Trutone A2-G
morzh Short-circuited turns can be considered as a half-dead transformer. But on this case transformer will hot and s...Vlad95 — 11:01 AM
Testing a speaker and output transformer Trutone A2-G
I am not sure how a transformer could be weak. It could be inadequate, but only when you replace the original with somet...morzh — 09:56 AM
Philco model 38 code 121 not receiving signal.
Good news everyone! I think I have found everything I need for rewinding the antenna coil primary. I found some pla...Stormlord5500 — 09:40 AM
Philco Battery-WWII vintage
My younger sister went to SUNY Plattsburg NY, (BS, MS, RN) in the late 1970sabout 10 min from the Northern NY / Canada b...MrFixr55 — 07:59 AM

[-]
Who's Online
There are currently 1755 online users. [Complete List]
» 3 Member(s) | 1752 Guest(s)
AvatarAvatarAvatar

>