Posts: 111
Threads: 2
Joined: Nov 2016
City: marystown nl canada
(11-25-2016, 02:09 AM)Arran Wrote: Capacitor C39, a .1 mf cap, is another to check, it should be connected to a 20,000 Ohm resistor and one of the tube socket terminals, with the other end grounded. Capacitor C30 is another, it's a .01 mf cap, it's connected between the oscillator coils and a 50,000 Ohm resistor, and ground. One thing that does not help on Canadian Marconi schematics is that they do not number or label the terminals on the tube sockets, many manufacturers will mark these out with a ring of circles around the tube diagram, with a letter to indicate what element is what like "K" for cathode, "P" for plate, etc. in each circle, it's rather annoying.
Regards
Arran right what I believe to be c-39 is connected to pin4 of tube 6k7 which also has a 27 k resistor connected to it which should be the 20k resistor and the other end is connected to pin 7 of tube 6k7 which is wrong correct or not
Messages In This Thread
RE: marconi 157 - by the picker - 11-25-2016, 01:53 PM
Users browsing this thread: 1 Guest(s)
|
|
Recent Posts
|
|
Philco 42-345 Restoration/Repair
|
| With regard to the speaker, unless the cone is so brittle that it crumbles as soon as you touch it I would try to repair...Arran — 04:07 AM |
|
Philco 42-345 Restoration/Repair
|
| That silver can capacitor is an aluminum electrolytic. You should replace it with an aluminum electrolytic with the valu...RodB — 11:46 PM |
|
Philco 42-345 Restoration/Repair
|
| Thank you Rodb and Gary for helping with clarification on these capacitors. Other than the Tiny 630volt one I'm not sure...osanders0311 — 10:17 PM |
|
1949 Motorola 5A9M
|
| Hello All;
I found the CMB41L down in the basement, it is definitely a 1950-51 model, the capacitors have date codes ...Arran — 07:48 PM |
|
Philco 42-345 Restoration/Repair
|
| Hi, all the caps I order, other than the electrolytics, are of the 630V rating. No worries on it being too high, and no ...gary rabbitt — 05:46 PM |
|
Philco 42-345 Restoration/Repair
|
| Hi, there's a lot to consider when designing these circuits so you shouldn't have a lot of concern when replacing caps. ...RodB — 02:03 PM |
|
Philco 42-345 Restoration/Repair
|
| I have ordered and received new caps for this radio and hope I've ordered the correct ones. I tried matching them to the...osanders0311 — 11:35 AM |
|
Philco newbie with P-1891-WA console questions
|
| Hello Jeff ,
Far as the Electrolytic capacitors go here is a list of parts.
that will work . I like using Nichicon and...radiorich — 09:50 PM |
|
Philco newbie with P-1891-WA console questions
|
| Well, I've been stumped at trying to get the first of 11 electrolytic capacitors. I got a schematic and have a list of t...Jeffcon — 07:54 PM |
|
Model 80 Antenna Issue?
|
| Thanks Gary and Rod.
I also found an article in the Philco Repair Bench under Service Hints and Tips, about installi...Hamilton — 12:32 PM |
|
Who's Online
|
| There are currently no members online. |
|
 
|
![[-]](https://philcoradio.com/phorum/images/bootbb/collapse.png "[-]")
