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

Alignment.
#15

Connecting a counter to the grid of the oscillator is a definite NO NO!!!  What ever you use to make that connection will as capacitance and lower the frequency;  as soon as you remove the connection the frequency will go up.

You need to wind perhaps 10 turns of and small insulated wire to make a loop of about one inch;  that will be your counter pick-up.  Just put the loop around the tube (without shield) or put the loop in the general area of the oscillator coil.  Remember that the oscillator should be 455KC above the dial freq.

With your radical freq error between 600 and 800KC, that's not from an error in coil turns-  no way.  Look very carefully at the tuning capacitor plates;  they should be perfectly centered.  It sound like you have a near short in the tuning cap, most likely one of the outer plates.

Pete AI2V


Messages In This Thread
Alignment. - by fields 100 - 09-29-2014, 04:50 PM
RE: Alignment. - by Radioroslyn - 09-29-2014, 09:33 PM
RE: Alignment. - by fields 100 - 09-29-2014, 10:36 PM
RE: Alignment. - by Radioroslyn - 09-30-2014, 06:36 AM
RE: Alignment. - by fields 100 - 09-30-2014, 07:21 AM
RE: Alignment. - by Radioroslyn - 09-30-2014, 05:03 PM
RE: Alignment. - by fields 100 - 09-30-2014, 05:53 PM
RE: Alignment. - by Radioroslyn - 09-30-2014, 08:20 PM
RE: Alignment. - by fields 100 - 09-30-2014, 09:51 PM
RE: Alignment. - by Radioroslyn - 10-01-2014, 07:07 PM
RE: Alignment. - by morzh - 10-01-2014, 08:00 PM
RE: Alignment. - by fields 100 - 10-01-2014, 10:04 PM
RE: Alignment. - by mikethedruid - 10-03-2014, 12:37 AM
RE: Alignment. - by fields 100 - 10-03-2014, 07:31 AM
RE: Alignment. - by AI2V - 10-04-2014, 11:07 AM
RE: Alignment. - by fields 100 - 10-05-2014, 06:13 AM
RE: Alignment. - by Radioroslyn - 10-05-2014, 09:11 AM
RE: Alignment. - by Mondial - 10-05-2014, 09:37 AM
RE: Alignment. - by AI2V - 10-05-2014, 11:05 AM
RE: Alignment. - by fields 100 - 10-06-2014, 06:30 AM
RE: Alignment. - by Mondial - 10-06-2014, 09:20 AM
RE: Alignment. - by fields 100 - 10-06-2014, 11:12 AM



Users browsing this thread: 2 Guest(s)
[-]
Recent Posts
Philco 91 Speaker Replacement
The spider is glued on the cone and so is the voice coil. I think you can use a cotton swab dipped in acetone and carefu...RodB — 02:42 PM
Restoring Philco 37-604C
Yes I saw that. If I knew, I'd probably try to arrange for getting it myself. But I have just got one. Which does not m...morzh — 01:44 PM
Philco 38-2 Automatic Tuning
When you push the lever, you are supposed to rotate the disk to the desired station. Then the magnetic tuning will acqu...morzh — 01:42 PM
Philco 38-2 Automatic Tuning
I figure out the muting from another picture that helped. Now I need to know how the automatic tuning works. When I push...dconant — 12:11 PM
Philco 91 Speaker Replacement
How would I go about removing the spider from the cone?dconant — 12:04 PM
Philco 38-2 Automatic Tuning
Hello, I am having trouble getting my automatic tuning to stay unmuted. If I play with the tuning handle I can get it to...dconant — 10:51 AM
Does anyone make photofinish replacements?
Here’s the link to the DIY photofinish section of our site: klondike98 — 09:46 AM
Delco car radio Peko vibrator converstion issues
Hi Richard, Thx for posting the schematic.  As I remember as a kid, these were great performers for the time, likely...MrFixr55 — 08:56 AM
Delco car radio Peko vibrator converstion issues
hello mr Fixr, The Electro  Powersupply that I am powering the radio with has a huge choke plus a 10,000ufd electrolyti...radiorich — 10:58 PM
Delco car radio Peko vibrator converstion issues
How about putting a choke in the power supply? The big cap was likely an attempt to stabilize the DC. Kids who cre...MrFixr55 — 09:19 PM

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

>