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

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

Oscillator Circuit
#1

Hi All;
I am building an Oscillator Circuit based on my Philco 34 Radio, I am using as a model the Philco 39, since it is essencially the same circuit, except that the 34 is a four Band and the 39 is a two band Radio.. The Philco 39 is simplier to follow..
What I am asking is -- I want to using my scope find out what frequency the oscillator is oscillating at, So I figured that If I connect a Capacitor to the plate, I can measure the frequency from the Cap..
What size of CAP should I use ??
The tube is a 1C6 Pentagrid converter, I am only going to hook up the oscillator part of the circuit, and not the RF, that would only be hooked up thru a resistor to -3 as per schematic..

http://www.nostalgiaair.org/Resources/185/M0013185.htm Philco 34

http://www.nostalgiaair.org/Resources/265/M0013265.htm Philco 39
THANK YOU Marty


Messages In This Thread
Oscillator Circuit - by marty - 08-22-2013, 04:59 PM
RE: Oscillator Circuit - by BrendaAnnD - 08-22-2013, 06:22 PM
RE: Oscillator Circuit - by marty - 08-22-2013, 11:11 PM
RE: Oscillator Circuit - by morzh - 08-23-2013, 10:34 AM
RE: Oscillator Circuit - by marty - 08-23-2013, 08:18 PM
RE: Oscillator Circuit - by Mondial - 08-23-2013, 08:46 PM
RE: Oscillator Circuit - by morzh - 08-23-2013, 09:24 PM
RE: Oscillator Circuit - by marty - 08-23-2013, 10:19 PM
RE: Oscillator Circuit - by marty - 08-23-2013, 11:01 PM
RE: Oscillator Circuit - by morzh - 08-23-2013, 11:47 PM
RE: Oscillator Circuit - by marty - 08-24-2013, 12:22 AM
RE: Oscillator Circuit - by BrendaAnnD - 08-24-2013, 01:31 AM
RE: Oscillator Circuit - by marty - 08-24-2013, 10:50 AM
RE: Oscillator Circuit - by morzh - 08-24-2013, 11:52 AM
RE: Oscillator Circuit - by marty - 08-24-2013, 05:01 PM



Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
Philco 46-480 Electronic Restoration
Late last night a guy reached out in response to my posting on the Antique Radio Forum and suggested I contact Trust Aut...jrblasde — 11:01 AM
Philco 630csx power cord
Have you opened up that plug? It may be that the third wire is connected to that brass stud on the side of the plug and ...Arran — 02:57 AM
Model 27-84 BUZZ?Humm?
I would have to look at the schematic but it's not uncommon in 1930s AC radios to have the negative of one filter cap co...Arran — 02:46 AM
Model 27-84 BUZZ?Humm?
Hello Bruce, First all do mean a 37-84b ? Did you take any before and after pictures ? is it a buzz like when you touch...radiorich — 01:59 AM
B&K 1077B no video - problem solved
Hello Tim, Yes, I even check all of my replacement parts when I install them and I too had a capacitor go bad not long a...radiorich — 01:54 AM
B&K 1077B no video
I got back into it tonight. Problem found and resolved! Sometimes it helps to take a break and think things over. It was...TV MAN — 12:40 AM
6TPZ and 5TPO Radio Help
Thank you. I have to take a break from it for about a week. I'll have to do some thinking. I was toying with the idea ...R3Sons — 12:21 AM
Model 27-84 BUZZ?Humm?
Drowning in a overloud buzz/Humm. Have already changed filter caps,bakelite blocks( caps),out of speck resistors,checked...Bruce — 12:17 AM
Philco 630csx power cord
Hello Mike Here is the Link to the company the place is called Grand Brass lamp parts . I buy all my Lamp parts plus ...radiorich — 12:00 AM
Philco 40-120C Filament Wiring
Is the tube in your radio actually 35Z3 or 35Y4, or something else?morzh — 10:55 PM

[-]
Who's Online
There are currently 2984 online users. [Complete List]
» 2 Member(s) | 2982 Guest(s)
AvatarAvatar

>