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

B&K 1077B
#9

After (I believe) chasing a ghost, I have this unit working pretty good. I think the biggest problem is our high AC line voltage. I have checked everything and verified voltages. Even dug out Uncle Max's 1077 and fired it up to find exactaly the same currents and voltages and is working fine. **I noted that his 220 ohm resistor was also replaced and that he had removed the flyback, which I'm sure was for testing. I think he was chasing the same ghost.** 

So I, I installed a 300 ohm resistor to drop the B+ a little and did my final "smoke test". After 45 minutes of running, nothing overheated. I could lay my hand on the PT without any violent withdrawl, screams or other form of sudden protest. I have checked functions and waveforms and seems everything is working as it should. Nice clean sweep waveforms, all channels clear, video and bias voltage. So, I buttoned it back up and is ready for my 1st test on the Craftsmen.

The below picture is on a small analog test TV I have. The slightly stretched vertical is in the set as Uncle Max's unit was identical. 

   

I found this book to have a lot of period correct and practical "how to" information on using this instrument. 
   

If I could find the place called "Somewhere", I could find "Anything" Icon_confused

Tim

Jesus cried out and said, "Whoever believes in me , believes not in me but in him who sent me" John 12:44


Messages In This Thread
B&K 1077B - by TV MAN - 11-22-2020, 04:06 PM
RE: B&K 1077B - by radiorich - 11-25-2020, 04:13 PM
RE: B&K 1077B - by Radioroslyn - 11-25-2020, 06:17 PM
RE: B&K 1077B - by TV MAN - 11-30-2020, 06:29 PM
RE: B&K 1077B - by TV MAN - 11-30-2020, 10:26 PM
RE: B&K 1077B - by TV MAN - 12-01-2020, 10:10 PM
RE: B&K 1077B - by TV MAN - 12-14-2020, 06:43 PM
RE: B&K 1077B - by Phlogiston - 12-16-2020, 03:55 PM
RE: B&K 1077B - by TV MAN - 12-19-2020, 11:23 AM



Users browsing this thread: 3 Guest(s)
[-]
Recent Posts
Correct model 84 Ac plug an cord type
From what I read Philco went to using brown rubber power cords in 1936, so cloth was used in the 1935 and earlier models...Arran — 11:25 PM
Correct model 84 Ac plug an cord type
Hi Bruce, I have not worked on an 84, but in general, power cords for almost any radio prior to 1938 was cloth covered...MrFixr55 — 08:34 PM
Restoring Philco 38-14
OK, well, so after staring at the sch again, I realized the problem had to be the #12/12A padder. I put a scope on the o...morzh — 08:15 PM
Correct model 84 Ac plug an cord type
Hello Bruce, I mostly use brown far as my cloth powercords go ! Here is the plug that I have used bakelite Acorn style...radiorich — 08:05 PM
Correct model 84 Ac plug an cord type
Looking for as correct as can find the right Ac plug an the correct colored cloth line. Ive seen many old photos but mos...Bruce — 04:13 PM
Restoring Philco 38-14
Rod Two Y-caps make sense if you use them from L/N to the chassis; this is only makes sense in the transformer radios...morzh — 10:11 AM
Restoring Philco 38-14
Mike, I'm curious about a specific use of he Y cap. Lately I've seen a single cap across the power transformer primary. ...RodB — 09:01 AM
Restoring Philco 38-14
hello morzh , That sounds like a plan ! Sincerely Richardradiorich — 07:45 AM
Restoring Philco 38-14
Richard, It helped some, but I still had the whining when engaging the rear power strip (I did not realize it was fro...morzh — 07:07 AM
Restoring Philco 38-14
Hello morzh, Yes , that dreaded hum in my room where i do alighment I have my cable modem and router plus desktop plus ...radiorich — 11:25 PM

[-]
Who's Online
There are currently no members online.

>