Found a Westy!

[Komet]

I have checked the voltages at different points in the set, and I discovered that the 135V (IF and tuner power supply) are reduced to 88. I think it's a defect of one of these capacitors, probably C4

http://imageshack.us/photo/my-images/694/wesk.jpg/

[jstout66]

Nice set Komet!
I think I have the table-top version, which I just listed in the classifieds section.

[Ronce67]

I remember seeing a picture of this set on Shorpy.com- a website of vintage photos. I went back and found it for you. Here is a copy of the text that was with the photo;

"Dad is waiting for the Westinghouse to warm up, and the channel selector is set at 7, WXYZ, Detroit. Other choices were 2, WJBK; 4, WWJ and 9, CKLW in Windsor, Ontario, where we lived. The console TV had doors that closed so that it looked like a piece of fine furniture. The TV was turned on for a show, and when that was over it was turned off. If you tuned in too early in the day all you got was the dreaded Test Pattern. A favourite back then was Detroit's own Soupy Sales. The antenna was up in the attic of our two-story home."

[Komet]

What a beautiful picture! I found this advertising of the Westinghouse italian importer.



I and a my friend have found the cause of low voltage, was mounted a 6V6 instead of a 6W6.
Replaced, I have wonderful video, but low power audio with distorsion and interference with color transmission. Also low snow effect.
Tomorrow I recheck some voltages and all tubes.

[Komet]

Some progress. I checked if the audio trap is on 5.5 MHz used in Italy, and the interference in the sound is disappeared. Remains the problem of low power audio, I tried to connect my walkman to the volume control and I saw that the audio is low and distorted, the problem is in the power audio output. Tomorrow I check some capacitors, including the coupler capacitor between 6T8 and 6W6 and the capacitor between the anode and cathode of the 6W6

[Reece]

Good picture on that set!

[Komet]

Ok, the distorsion problem is in the audio output section. This is the schematic...

http://img193.imageshack.us/img193/8648/audiowes.jpg

-C69, C1c, C73, C1d tested ok
-C72 and C74, I disconnect it but nothing changes
-R63 was bad, replaced but same results...
-C4 replaced
-6W6 is NOS
-R66, 67, 68, 69, 70 are ok
-R71 ok
-plate voltages ok
-Tried with another output transformer but nothing changes
-My set have a mica capacitor between R67 and the plate of 6T8/C72/R66, supposed for inverse reaction, I bypass it but same results...
I buyed a new 6T8 on evilbay, argh...

With a 2-3Vpp imput, distorsion starting at 10Vpp (2V/div)



Max volume, 25Vpp and 5V/div



If 6T8 is ok, I check the power supply capacitors...

[Giulio Maiocco]

Hi, from my experience, just don't test paper capacitors, put these suckers in the trash bin and [U]replace[U] with new poyester ones, period. IMHO, no paper capacitor is a good one and you'll never find one in any set of my collection.

If you need 6T8's, I have many and can spare a couple too, we are quite close geographically speaking

Cheers

Giulio

Edit: Where exactly do you inject the audio signal? At the 6T8's grid, right? If so, 2 to 3 Vpp at this point is too much. As the grid is only a fraction of a volt negative, you'll need only perharps 1Vpp to achieve full output power, any of the members correct me if I'm wrong please!

[Komet]

I have replaced C73, no results... I injected the signal on the volume control, if on the grid need only 1Vpp my 6T8 is bad... some day ago I have buyed one of these for 1$ on ebay

Thanks

Marco

[kvflyer]

To somewhat reinforce some of what is said above, one of our beloved members on another forum always said, "If the cap makes a sound when it hits the bottom of the empty trash can, it was bad!" If you have to take one side loose to test it, you only have one other side to remove...

[Giulio Maiocco]

Forgot another thing, Marco: you could use the EABC80 tube instead of the 6T8, so if you have a radio that uses the "european" variant, you could borrow the tube and rapidly confirm or not that the original 6T8 is bad

Cheers

Giulio

[Komet]

I have several UABC80, because italian radios have the heater connected in series. I have put the chassis in the cabinet, I need a pause

Pause = working on a Grundig 5088

[Komet]

Found the problem: bad speaker

[Komet]

A friend fixed the speaker of my Westy, probably has been damaged by moisture
Finish

[Glenz75]

Nice set Congratulations on its restoration too.