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

Rock the gang....
#1

Thid means...what?
Does it mean simply slightly rotating the tuning knob left and right, looking for the maximum signal?
Then what's the point if I just tuned trimmers to have the peak at the generator's frequency?
#2

Morzh, I am awaiting an answer as well, never did understand the purpose of "rocking the gang".
Jerry

A friend in need is a pest!  Bill Slee ca 1970.
#3

Yes, you are adjusting the trimmer AND rocking the tuning cap for max gain. I have never found "rocking the gang" to be of much value.
#4

I'll try to explain it. The procedure is for radios that have a padder adjustment for the low end of a band. For the standard broadcast band, typically a 600 KHz signal is coupled to the antenna and the dial pointer on 600. Then you adjust the padder so the signal is comes in at 600 on the dial.

In most instances this is plenty good enough. Next you can use the "rock the gang" procedure to squeeze out a little more sensitivity at the low end of the band.

Adjust the padder while moving the gang capacitor slightly in one direction to see if the sensitivity can be improved. If no better try adjusting the padder and gang capacitor in the other direction for any increase in sensitivity. Helps to monitor the AVC voltage than by ear.

What this is doing is searching where the gang capacitor's antenna section and antenna coil resonate at maximum. Dial pointer accuracy is somewhat sacrificed for sensitivity.

After a while it starts to make sense.
#5

Oh, it always made sense, it just never made much difference.




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 2956 online users. [Complete List]
» 1 Member(s) | 2955 Guest(s)
Avatar

>