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
|
|
Zenith H725
|
| I completed the insulation on the cabinet interior (Al foil and hi temp silicone rubber), and reglued the speaker gasket...EdHolland — 06:18 PM |
|
HiFi (Chifi) tube amp build - but my own design.
|
| Tim - Photos of 8 octal tube sockets. (Top and bottom)
Send me a PM if you're interested.RodB — 04:11 PM |
|
VTVM meter moves when my hand is next to it & not on
|
| Haha! I hope so. It seemed rather lost and forgotten languishing in the frozen Northeast of England.EdHolland — 02:36 PM |
|
VTVM meter moves when my hand is next to it & not on
|
| Ed - it's in the Cayman's enjoying the good life.RodB — 02:14 PM |
|
VTVM meter moves when my hand is next to it & not on
|
| Static electricity - but the other chaps beat me to it again. I've seen this before with analogue meters.
I've also ...EdHolland — 01:56 PM |
|
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 |
|
Who's Online
|
| There are currently no members online. |
|
 
|
![[-]](https://philcoradio.com/phorum/images/bootbb/collapse.png "[-]")
