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

Poss. OSC Problems Philco 34
#12

Hi All;
No good on the 34.. But I have made significant progress on the Breadboard.. Since, switching the wiring arround on the 1C6 so that the dropping resistor has the correct voltages on it.. And taking the Cap out of the circuit that was in parallel with the Coil, it Now will Oscillate.. It is not at the correct frequency, but it oscillates..
I decided to Re-Count the number of turns I had on the secondary coil.. It seems that I had lost count more than I thought.. I re-counted by marking with a black marker every ten turns, and found that instead of 110 turns I had 162 turns..
I took off two turns and measured the resistance for a base measurement and then took off 10 more turns measuring each time with my VTVM.. After getting the VTVM going again.. (Another posting).. when I got down to my goal of 100 turns I tapped it to a terminal and wrapped 10 more turns and put it to another terminal..
When I tried the oscillator at the 100 turn mark the Frequency was a little high.. I tried it at the 110 mark and it was Higher yet..
So, I took off the extra 10 turns and then took off 5 more turns tapped it to a terminal and put the remaining 5 back on just in case, and terminated it..
I tried it at the origional 100 turn mark, still too high, tried it at the 95 turn mark it was almost correct, and with a little tweaking on the grid leak Variable Cap I got it to Oscillate at about 1010KC..
Which led me to my Tuning question, (another posting)..
THANK YOU Marty


Messages In This Thread
Poss. OSC Problems Philco 34 - by marty - 08-16-2013, 12:08 AM
RE: Poss. OSC Problems Philco 34 - by BrendaAnnD - 08-16-2013, 02:10 AM
RE: Poss. OSC Problems Philco 34 - by marty - 08-16-2013, 10:16 AM
RE: Poss. OSC Problems Philco 34 - by Arran - 08-16-2013, 07:42 PM
RE: Poss. OSC Problems Philco 34 - by marty - 08-16-2013, 08:37 PM
RE: Poss. OSC Problems Philco 34 - by marty - 08-17-2013, 09:43 PM
RE: Poss. OSC Problems Philco 34 - by marty - 08-17-2013, 10:23 PM
RE: Poss. OSC Problems Philco 34 - by marty - 08-19-2013, 02:48 PM
RE: Poss. OSC Problems Philco 34 - by marty - 08-19-2013, 04:13 PM
RE: Poss. OSC Problems Philco 34 - by marty - 08-26-2013, 01:38 PM
RE: Poss. OSC Problems Philco 34 - by marty - 08-26-2013, 03:12 PM
RE: Poss. OSC Problems Philco 34 - by marty - 08-31-2013, 07:02 PM
RE: Poss. OSC Problems Philco 34 - by marty - 09-02-2013, 10:34 AM
RE: Poss. OSC Problems Philco 34 - by marty - 09-02-2013, 02:28 PM
RE: Poss. OSC Problems Philco 34 - by marty - 09-02-2013, 09:34 PM



Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
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
First Radio restoration
Hi Tubeman, Welcome to the Philco Phorum.  Phamily Phriendly Pfun with Phine Pholks Phull of Philco Phacts. (See a p...MrFixr55 — 12:33 PM
First Radio restoration
You could post in the WANTED ADs section here on the Phorum and see if anyone has an RF generator that they want to sell...klondike98 — 11:55 AM
Zenith H725
Good ideas, thank you Arrange and Rich. I have the adhesive aluminum foil already and can try that immediately. More ...EdHolland — 10:18 AM
Graphics for majestic 1050 dial glass.
Murf; I found this thread on the ARF, the first photo has a pretty good view of the dial glass. Regards ArranArran — 01:12 AM
Zenith H725
hello Ed, how about that speacial tape used for ducting it's like foil or how about thin piece of aluminum roof flash...radiorich — 12:19 AM

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

>