1. The PHILCO Phorum
  2. Various and Sundry Categories
  3. Other Radios (Non-Philco)

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

Linear Mode
Coronado Oscillator problem
MrFixr55
Super Moderator
******
Posts: 1,288
Threads: 11
Joined: Jul 2020
City: Greenlawn State, Province, Country: NY
#8

03-12-2023, 05:44 PM
Possibly a shorted oscillator coil, but most of the time, that would kill oscillation totally. You are correct, the Oscillator section of the tuning cap should (but not always) have smaller or fewer plates than the RF section. The oscillator sounds like it is running at approx 250KHZ higher than it should. If the coil is not slug tuned, I would try to replace it.
"Do Justly, love Mercy and walk humbly with your God"- Micah 6:8
"Let us begin to do good"- St. Francis

Best Regards, 

MrFixr55
Find
« Next Oldest | Next Newest »
Thread Closed


Messages In This Thread
Coronado Oscillator problem - by Tom45acp - 03-10-2023, 07:39 PM
RE: Coronado Oscillator problem - by Arran - 03-10-2023, 11:31 PM
RE: Coronado Oscillator problem - by MrFixr55 - 03-11-2023, 06:21 AM
RE: Coronado Oscillator problem - by Tom45acp - 03-11-2023, 11:15 AM
RE: Coronado Oscillator problem - by MrFixr55 - 03-12-2023, 03:40 AM
RE: Coronado Oscillator problem - by Tom45acp - 03-12-2023, 10:31 AM
RE: Coronado Oscillator problem - by RodB - 03-12-2023, 11:07 AM
RE: Coronado Oscillator problem - by MrFixr55 - 03-12-2023, 05:44 PM
RE: Coronado Oscillator problem - by Arran - 03-13-2023, 02:41 AM
RE: Coronado Oscillator problem - by Tom45acp - 03-13-2023, 08:24 AM
RE: Coronado Oscillator problem - by Tom45acp - 03-14-2023, 06:13 PM
RE: Coronado Oscillator problem - by Tom45acp - 03-21-2023, 08:02 AM



Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
Philco 42-345 Restoration/Repair
RodB :beerchug:Vlad95 — 10:22 AM
Philco 42-345 Restoration/Repair
Vlad, you nailed it. Swiss and German roots.RodB — 09:54 AM
5U4 vs 5Z4 tubes
Well this is a Hallicrafters SX/9 circa 1936. No real issues so far although I dodged a real bullet with a cap that was...bridkarl — 07:59 AM
5U4 vs 5Z4 tubes
The pinout is the same but the 5U4 has a 3 amp filament, verses 2 amps or less on the 5Z4. I think that the pinout of a ...Arran — 12:04 AM
Philco 42-345 Restoration/Repair
By the way. osanders0311 Take a look here: Dial cord stringing Guides May be here you can fount correct string settin...Vlad95 — 11:15 PM
5U4 vs 5Z4 tubes
5U4 and 5Z4 almost identical. I think nothing happened if you left 5U4 instedad 5Z4 long time. Just heater current 5U4 ...Vlad95 — 11:02 PM
Philco 42-345 Restoration/Repair
Hello Vlad95 , Very Funny ! Sincerely Richardradiorich — 11:01 PM
Philco 42-345 Restoration/Repair
RodB You are European yourself   :evil: I'm Canadian for the last 30 years  :snowman: But not Yankee  :lol: Vlad95 — 10:49 PM
Philco 42-345 Restoration/Repair
The band switch selects different oscillator coils for the band selected. I would look for a bad connection in the switc...RodB — 10:31 PM
Philco 42-345 Restoration/Repair
Hang in there...PaulPaul Philco322 — 09:30 PM

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

>
  1. The PHILCO Phorum
  2. Various and Sundry Categories
  3. Other Radios (Non-Philco)