Stromberg Carlson 420

7/16/2000 12:19:01 AMRon Beam

Hello,
I have the 420 model and recently sent away for the Rider schematic which was extremely useful in testing and replacing bad capacitors and resistors. Unfortunately, the schematic does not include alignment procedures and I think this radio is a less sensitive than it should be (especially on short wave). Would anyone be able to point me to information on alignment? I hate to just inject a signal and go turning screws indiscriminately. Thanks!
Ron

7/17/2000 2:20:35 AMBrad Winder

Hi Ron!
What volume of Riders and what page is the 420 on? I have the Canadian schematics for Stromberg and there is a good chance the same radio was produced up here, but under a different model #. I can find it by comparing schematics-there isn't a cross reference chart for Stromberg-Carlson US/Canadian like there is for RCA/GE/Westinghouse unfortunately.
Brad Winder
Hay Lakes, Alberta, Canada

: Hello,
: I have the 420 model and recently sent away for the Rider schematic which was extremely useful in testing and replacing bad capacitors and resistors. Unfortunately, the schematic does not include alignment procedures and I think this radio is a less sensitive than it should be (especially on short wave). Would anyone be able to point me to information on alignment? I hate to just inject a signal and go turning screws indiscriminately. Thanks!
: Ron

7/18/2000 10:37:45 PMRon Beam

Hi Brad,
I just have photocopies of the relevant pages but they are listed as Stromberg Page 11-13 through 11-16. Check out http://63.194.83.15/~rbeam/420.jpg for pic of main schematic. Thanks!
Ron

: Hi Ron!
: What volume of Riders and what page is the 420 on? I have the Canadian schematics for Stromberg and there is a good chance the same radio was produced up here, but under a different model #. I can find it by comparing schematics-there isn't a cross reference chart for Stromberg-Carlson US/Canadian like there is for RCA/GE/Westinghouse unfortunately.
: Brad Winder
: Hay Lakes, Alberta, Canada

: : Hello,
: : I have the 420 model and recently sent away for the Rider schematic which was extremely useful in testing and replacing bad capacitors and resistors. Unfortunately, the schematic does not include alignment procedures and I think this radio is a less sensitive than it should be (especially on short wave). Would anyone be able to point me to information on alignment? I hate to just inject a signal and go turning screws indiscriminately. Thanks!
: : Ron

7/19/2000 11:36:19 AMBrad Winder

Ron,
My copy of Rider's Vol. 11 has the alignment for your model 420. It's on page 11-17, a page you probably don't have. I can send you a scan of it if you want, or a copy in the mail.
Brad

: Hi Brad,
: I just have photocopies of the relevant pages but they are listed as Stromberg Page 11-13 through 11-16. Check out http://63.194.83.15/~rbeam/420.jpg for pic of main schematic. Thanks!
: Ron

: : Hi Ron!
: : What volume of Riders and what page is the 420 on? I have the Canadian schematics for Stromberg and there is a good chance the same radio was produced up here, but under a different model #. I can find it by comparing schematics-there isn't a cross reference chart for Stromberg-Carlson US/Canadian like there is for RCA/GE/Westinghouse unfortunately.
: : Brad Winder
: : Hay Lakes, Alberta, Canada

: : : Hello,
: : : I have the 420 model and recently sent away for the Rider schematic which was extremely useful in testing and replacing bad capacitors and resistors. Unfortunately, the schematic does not include alignment procedures and I think this radio is a less sensitive than it should be (especially on short wave). Would anyone be able to point me to information on alignment? I hate to just inject a signal and go turning screws indiscriminately. Thanks!
: : : Ron

7/19/2000 11:50:44 AMRon Beam

Brad,
If you could send me a scan of the relevant information, that would be fantastic. I can print it out and take it to the garage. Thanks for your help!

Ron

: Ron,
: My copy of Rider's Vol. 11 has the alignment for your model 420. It's on page 11-17, a page you probably don't have. I can send you a scan of it if you want, or a copy in the mail.
: Brad

: : Hi Brad,
: : I just have photocopies of the relevant pages but they are listed as Stromberg Page 11-13 through 11-16. Check out http://63.194.83.15/~rbeam/420.jpg for pic of main schematic. Thanks!
: : Ron

: : : Hi Ron!
: : : What volume of Riders and what page is the 420 on? I have the Canadian schematics for Stromberg and there is a good chance the same radio was produced up here, but under a different model #. I can find it by comparing schematics-there isn't a cross reference chart for Stromberg-Carlson US/Canadian like there is for RCA/GE/Westinghouse unfortunately.
: : : Brad Winder
: : : Hay Lakes, Alberta, Canada

: : : : Hello,
: : : : I have the 420 model and recently sent away for the Rider schematic which was extremely useful in testing and replacing bad capacitors and resistors. Unfortunately, the schematic does not include alignment procedures and I think this radio is a less sensitive than it should be (especially on short wave). Would anyone be able to point me to information on alignment? I hate to just inject a signal and go turning screws indiscriminately. Thanks!
: : : : Ron

7/17/2000 10:00:10 PMJohn McPherson

Hi,
For the best results, giving the unit a complete alignment is going to give best overall performance. Other than the differences encountered between the equipment details between your radio, and another radio's alignment instructions that you do find, the process is essentially the same.

If you want, you can e-mail me, and I can give a very complete "general application" alignment procedure. The basic outline would apply to any radio, and the only differences might be a "faster method" in the factory documentation.

In a nutshell, if you make allowances for differences between your radio, and one that you happen to have specific tuning instructions, the steps still apply, some of the small details will differ.

If nothing else, tuning the IF's to a single narrow peak is going to give you the fastest results to improved reception, but there will always be more that can be done.