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

Thread Closed

60MB needs some love
#18

Added the power cord, put all the tubes back and wired in the speaker.  The dial scale needs some work to flatten it out but that's for later...here's the finished under chassis and the topside.
[Image: https://www.dropbox.com/s/s9bza5iscoi7pg....jpg?raw=1]
[Image: https://www.dropbox.com/s/58nm69se3irr1l....jpg?raw=1]

Dim bulb showed no shorts but ramping up the voltage brought nothing except the pilot lamp and the 42 filaments ....hmmm.  Deoxit and pipe cleaner on the tube sockets and some cleaning of the tube pins gave better results...some crackling and humming of the speaker.   Voltages readings noted below:

[Image: https://www.dropbox.com/s/1x78i2qhume537....png?raw=1]

The 75 tube failed when tube tested on the grid cap so one is on order.  Thought I'd try it anyway.  Is that causing the negative voltages on the CG to K line?  (Power input is at 110v ac)

I thought I had checked the coils but decided to check the antenna coil and when I measure ANT to GND I get an open .   Icon_sad   (rechecked other coils and they ohm out OK )  Maybe I damaged the coil during derusting, recap etc.?
[Image: https://www.dropbox.com/s/7rh0trk69vm8kt....jpg?raw=1]

When I measure from the ANT lug to one side of the #1 (10k) resistor located on the Band Switch I get 11ohms but from that point to GND  is open so the 0.7 ohm section of the coil must be what is open.  Does that sound right to you guys? 


Messages In This Thread
60MB needs some love - by klondike98 - 02-21-2015, 12:36 PM
RE: 60MB needs some love - by Ron Ramirez - 02-21-2015, 12:52 PM
RE: 60MB needs some love - by morzh - 02-21-2015, 01:12 PM
RE: 60MB needs some love - by klondike98 - 02-21-2015, 03:10 PM
RE: 60MB needs some love - by klondike98 - 03-10-2015, 07:14 PM
RE: 60MB needs some love - by Ron Ramirez - 03-10-2015, 10:02 PM
RE: 60MB needs some love - by klondike98 - 03-10-2015, 10:13 PM
RE: 60MB needs some love - by klondike98 - 03-11-2015, 10:13 AM
RE: 60MB needs some love - by George Kirk - 03-11-2015, 02:15 PM
RE: 60MB needs some love - by klondike98 - 03-11-2015, 02:23 PM
RE: 60MB needs some love - by klondike98 - 03-11-2015, 07:50 PM
RE: 60MB needs some love - by Mondial - 03-12-2015, 12:01 AM
RE: 60MB needs some love - by klondike98 - 03-12-2015, 01:51 PM
RE: 60MB needs some love - by klondike98 - 03-15-2015, 07:50 PM
RE: 60MB needs some love - by sam - 03-15-2015, 08:06 PM
RE: 60MB needs some love - by klondike98 - 03-15-2015, 08:19 PM
RE: 60MB needs some love - by klondike98 - 03-17-2015, 09:39 PM
RE: 60MB needs some love - by klondike98 - 03-19-2015, 10:04 PM
RE: 60MB needs some love - by Mondial - 03-19-2015, 10:58 PM
RE: 60MB needs some love - by klondike98 - 03-20-2015, 11:43 AM
RE: 60MB needs some love - by Ron Ramirez - 03-20-2015, 12:05 PM
RE: 60MB needs some love - by klondike98 - 03-20-2015, 12:08 PM
RE: 60MB needs some love - by klondike98 - 03-20-2015, 07:47 PM
RE: 60MB needs some love - by Radioroslyn - 03-20-2015, 07:56 PM
RE: 60MB needs some love - by sam - 03-21-2015, 05:32 PM



Users browsing this thread: 3 Guest(s)
[-]
Recent Posts
Preliminary work on wife's Silvertone 2014
Hello roy, that great news glad it worked out for you !! Sincerely Richardradiorich — 10:50 PM
Preliminary work on wife's Silvertone 2014
Safety caps arrived today.  Soldered one in and had a successful first power-up.  No magic smoke escaped and it tunes in...glyphmon — 09:53 PM
HiFi (Chifi) tube amp build - but my own design.
Tim, you refer to “AK”. Is that Alaska or Atwater-Kent, or… JoeJoe Rossi — 11:49 AM
Grundig 5088
Skip, you are back to this one? As for fixing, Mark Oppat fixes vol. controls. Don't know about Grunding, but woul...morzh — 10:30 AM
Stromberg Carlson 1500 Squeal
I volunteer for a monthly Fixit Clinic in my county. All the fixers tell anyone who brings in a Keurig that it will prob...RodB — 10:24 AM
Stromberg Carlson 1500 Squeal
It's funny, a tale of 2 Keurigs. Friend's mom, an immigrant from Central America who had to leave school at the age of ...MrFixr55 — 09:01 AM
Stromberg Carlson 1500 Squeal
My biggest offender is our Keurig coffee maker. I make sure to keep it unplugged as it is still keeping the water warm w...dconant — 08:45 AM
Grundig 5088
All, Looking for a replacement volume control pot. or someone who can fix one.. Skipvecher — 09:17 PM
HiFi (Chifi) tube amp build - but my own design.
I did an experiment with these amps a month or so ago and I think they sound a lot better. I had been using a Douk pream...TV MAN — 03:08 PM
Stromberg Carlson 1500 Squeal
Have a touch lamp even off causes a problem up to 30 feet from the house have to unplug the monster. DavidDavid — 02:45 PM

[-]
Who's Online
There are currently 1551 online users. [Complete List]
» 1 Member(s) | 1550 Guest(s)
Avatar

>