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

Atwater Kent 708
#7

Thanks Russ.  I used the rubber wire you suggested.  I had to substitute orange for the yellow, as per your suggestion when using that wire with limited colors.  Brown wound up being cloth covered as opposed to the rubber.  Re-stuffing the AK capacitors is a bit of a pain.  The cardboard tube is very fragile and getting the guts out had to be a little different procedure.  Getting the speaker voice coil centered was also a bit of a pain.  Tried one way first, which didn't work. The second attempt was a success.

Mike, yes I had a pile of rubber pieces under the chassis as I moved things around.  This radio is a 708 but it actually follows the 808a schematic in several areas.  Perhaps it is a later 708. All wire was changed out except for a couple of connections inside the IF cans. They were just reinsulated. AK put some kind of back stuff around all of the coils that encapsulated some of the short connections inside the cans.

After complete reassembly, the radio didn't work.  B+ was only a few volts after the speaker field winding.  Tracked an intermittent short to the RF/IF chassis.  That was going to be a pain since it is not easily removable.  Several wires connected to lower band switch connections would have to be unsoldered.  I built up the rewire from the bottom of the switch to the top.  The short turned out to be in one of the IF cans that I could remove by working through the slightly spread chassis. Turned out one strand of the wire I replaced for the plate connection up on the pad didn't go through the hole and was shorted against the ground plate of the IF adjustment pad. In about an hour I had it fixed and reassembled.  Then the radio performed admirably, even with very questionable tubes.  IF tuning was very close, as was RF.  There are not a lot of controls for tuning.  I got the oscillator to work all across the bands by replacing the oscillator grid capacitor with a larger value.  Perhaps I will be able to go back to original value when I get a NOS 58 for the oscillator.  I'll be contacting Bob Dobush today!

Now to solve some of the problems with the cabinet.


Messages In This Thread
Atwater Kent 708 - by rfeenstra - 10-05-2020, 12:51 AM
RE: Atwater Kent 708 - by rfeenstra - 10-05-2020, 12:53 AM
RE: Atwater Kent 708 - by rfeenstra - 10-05-2020, 12:54 AM
RE: Atwater Kent 708 - by rfeenstra - 10-05-2020, 01:05 AM
RE: Atwater Kent 708 - by morzh - 10-05-2020, 09:25 AM
RE: Atwater Kent 708 - by Phlogiston - 10-05-2020, 10:51 AM
RE: Atwater Kent 708 - by rfeenstra - 10-05-2020, 12:00 PM
RE: Atwater Kent 708 - by rfeenstra - 10-05-2020, 08:57 PM
RE: Atwater Kent 708 - by Eliot Ness - 10-06-2020, 08:15 AM
RE: Atwater Kent 708 - by morzh - 10-06-2020, 10:31 AM
RE: Atwater Kent 708 - by Phlogiston - 10-06-2020, 10:50 AM
RE: Atwater Kent 708 - by morzh - 10-06-2020, 03:21 PM
RE: Atwater Kent 708 - by rfeenstra - 10-06-2020, 09:09 PM
RE: Atwater Kent 708 - by Eliot Ness - 10-07-2020, 01:57 PM
RE: Atwater Kent 708 - by rfeenstra - 10-17-2020, 11:11 PM
RE: Atwater Kent 708 - by Phlogiston - 10-18-2020, 10:07 AM
RE: Atwater Kent 708 - by rfeenstra - 10-18-2020, 12:32 PM
RE: Atwater Kent 708 - by rfeenstra - 10-25-2020, 03:43 PM
RE: Atwater Kent 708 - by Paul Philco322 - 10-25-2020, 05:58 PM
RE: Atwater Kent 708 - by Eliot Ness - 10-26-2020, 01:34 PM
RE: Atwater Kent 708 - by Paul Philco322 - 10-26-2020, 08:57 PM
RE: Atwater Kent 708 - by rfeenstra - 11-04-2020, 01:20 PM
RE: Atwater Kent 708 - by NostalgiaRadioTime - 11-05-2020, 01:38 AM
RE: Atwater Kent 708 - by Eliot Ness - 11-05-2020, 08:47 AM
RE: Atwater Kent 708 - by rfeenstra - 11-05-2020, 10:32 PM
RE: Atwater Kent 708 - by tbone - 11-06-2020, 07:50 AM



Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
Need to purchase some accessories for restoration of my Old Philco Radio
Hi Paulo, Welcome to the Philco Phorum. I can see why you want to find good reproduction parts. That is a bea...MrFixr55 — 11:10 PM
HiFi (Chifi) tube amp build - but my own design.
Tim, I have some bakelite sockets in my work shop that I can dig up. I believe quite a few are NOS. I will take photo...RodB — 10:03 PM
Philco 610B oscillator wiring
> The cathode as noted is wired directly to the ground side of the heater filament for that tube, not to the #17 and ...Radioroslyn — 08:12 PM
HiFi (Chifi) tube amp build - but my own design.
Tim; I noticed your post a little late, but I would take one of the junk sockets and try to break a chunk out of it wi...Arran — 08:07 PM
Need to purchase some accessories for restoration of my Old Philco Radio
Here is a list of resources found in our online library that you might find useful. Mike's Gobs of Knobs email addres...klondike98 — 01:46 PM
First Radio restoration
Hi Tubeman, Welcome to the Philco Phorum.  Phamily Phriendly Pfun with Phine Pholks Phull of Philco Phacts. (See a p...MrFixr55 — 12:33 PM
First Radio restoration
You could post in the WANTED ADs section here on the Phorum and see if anyone has an RF generator that they want to sell...klondike98 — 11:55 AM
Zenith H725
Good ideas, thank you Arrange and Rich. I have the adhesive aluminum foil already and can try that immediately. More ...EdHolland — 10:18 AM
Graphics for majestic 1050 dial glass.
Murf; I found this thread on the ARF, the first photo has a pretty good view of the dial glass. Regards ArranArran — 01:12 AM
Zenith H725
hello Ed, how about that speacial tape used for ducting it's like foil or how about thin piece of aluminum roof flash...radiorich — 12:19 AM

[-]
Who's Online
There are currently 1463 online users. [Complete List]
» 2 Member(s) | 1461 Guest(s)
AvatarAvatar

>