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

marconi 157
#31

Well....I won't be able to tell from the pictures but the idea is, the cap C30 through R13 and the connected part of the switch should have the plate voltage for that pin 6. So see if it is there.

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.
#32

hey picker
have you watched jornone on you tube
https://www.youtube.com/user/joernone/videos
john is great for beginner's to experts
if your adding wire to a cap to make longer. add wire first then tubing to cover and do a pig tail at end
makes it much neater
as far as coil wire .
wire most likely pull out of case just follow up and around to top.
it should go inside tube and up to one of the post

sam

Some day, and that day may never come, I will call upon you to do a service for me. But until that day, accept this justice as a gift
mafiamen2
#33

(11-21-2016, 07:46 AM)morzh Wrote:  Well....I won't be able to tell from the pictures but the idea is, the cap C30 through R13 and the connected part of the switch should have the plate voltage for that pin 6. So see if it is there.
sorry for this question but where is r-13 connected
#34

heres more info
[Image: https://image.jimcdn.com/app/cms/image/t.../image.jpg]

and 1/4 way down page some info
http://lrc-metro-maquette.jimdo.com/radi...ni-1-plan/

Some day, and that day may never come, I will call upon you to do a service for me. But until that day, accept this justice as a gift
mafiamen2
#35

thanks sam found it and replaced r-13 with a 56 k resistor and now have 90 dc v on pin 6 of tube 6k8 but still got the motor boating
#36

also looking for c-24 and can not find it on the schematic
#37

(11-21-2016, 01:12 PM)sam Wrote:  heres more info
[Image: https://image.jimcdn.com/app/cms/image/t.../image.jpg]

and 1/4 way down page some info
http://lrc-metro-maquette.jimdo.com/radi...ni-1-plan/
also sam I just noticed the cap list says c-19 is a .1 mfd but if you look at pacific tv schematics it says .01 mfd any idea which is right 
#38

 That wire on the coil may be a what they called a "gimick" it's a home made low value capacitor, in any event it's on one of the short wave coils so it would not be responsible for the motor boating issue.
Regards
Arran
#39

any help on the different cap value from the two different schematics
#40

Picker

if you are looking for a part that is not in the sch (or seems to be) it helps to identify where it is connected and then look at the sch again. If it is not there.....there are various ways to figure out what it is and what the value should be.

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.
#41

hi I found cap 24 but still have a problem with cap 19 on the list in the forum it states that it is a .1 mfd but on pacific online schematics it states .01 mfd which is correct thanks
#42

The sch says 0.01,uF. however 0.1uF will work just the same. Not important.

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.
#43

well I guess then I am back to the motor boating problem where do I look
#44

Leaving 6F6 (output tube) in place start removing other tubes one by one and then putting them back.

First 6R7. Remove, see if the motorboating stops, then put back. If it did not stop, stop here.
If yes, then do the same with the 6U5 tube.
Until you find the tube where it does not stop with the removal (likely the RF tubes won't stop it).
Likely to be either of the 6U5 or 6R7.

Again, you have to find the last tube as far from the output (or as close to the antenna) that stops the motorboating once removed.

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.
#45

I first took the 6r7 tube out and it stopped and next the 6u5 and it did not stop so what to do next thanks




Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
Philco 39-116 radio and remote
Hi Brad, Thanks so much for the info!  Do you happen to have the specs for the PT-86 transformer?  I did not find a lis...RichG — 04:32 PM
Philco 269 - 444 FIVE VALVE VERSION?
Thanks Arran; If your set has five tubes/valves then it could be an A537, V537, or a U527, then again it looks like s...ChasL0001 — 11:07 AM
Philco 29 or 45
29 chassis has a shadow meter while 45 chassis does not. Shadow meter is part no. 27 in the 29 schematic. compare it t...klondike98 — 10:32 AM
Philco 269 - 444 FIVE VALVE VERSION?
Sorry, Chas. Re the burns, I broke my first TV at the age of 3.  Between my electrical experiments :yikes: (My mom wa...MrFixr55 — 09:07 AM
Philco 41-221 Restored
Thanks for the compliment Richard. The tenite grille is original. A few of the horizontal slats were slightly warped so ...RodB — 08:44 AM
Philco 29 or 45
Hello, I have just received a Philco lowboy where the tube layout label in the cabinet says 29 or 45. There is no label ...dconant — 08:29 AM
Philco 41-221 Restored
Mr fixr, That is great news I would love to see repo grille !! I too have a very similar Philco but my cabinet has fab...radiorich — 08:22 AM
Philco 41-221 Restored
Hi Rod, I always tell people that my scars give me character.  :wink:   Great job on the radio.  Is the grille origi...MrFixr55 — 08:00 AM
Philco 269 - 444 FIVE VALVE VERSION?
It looks like the PENDD61 valve/tube must have failed, so someone replaced it with the EBC33, which is a double diode-tr...Arran — 04:29 AM
Philco 269 - 444 FIVE VALVE VERSION?
Hello Chas. Radiomuseum has information on both sets.  Thanks Gary, lots of good info there. Perhaps we'll ha...ChasL0001 — 02:23 AM

[-]
Who's Online
There are currently 2767 online users. [Complete List]
» 3 Member(s) | 2764 Guest(s)
AvatarAvatarAvatar

>