Crosley 9-413B Horizontal Issue

[Chris K]

Hi everybody,

Got the Crosley in a blonde cabinet in good shape. New old stock tubes in the set. I've adjusted the horizontal hold through the range but this crosshatch pattern won't lock up clear. Fuzzy focus is the camera. I've adjusted the linearity just a little with no difference. It has trimmers for horizontal frequency, drive and lock but I haven't touched them. Last time I had an issue like this, it was suggested the horizontal frequency was way off. What do you guys think???

BTW, I have an ImageShack account. How do I use it to embed photos in the post?

[WISCOJIM]

Originally Posted by Chris K

BTW, I have an ImageShack account. How do I use it to embed photos in the post?

Just put the imageshack (or other photo url) link between [IMG] and [/IMG].

Example using a photo stored at https://i.ebayimg.com/images/g/bgQAA...5X/s-l1600.jpg on ebay.

[/IMG]the ebay link[/IMG]

Blah, blah, blah...

Bladadee, blibidee, bloop.

.

[timmy]

Originally Posted by Chris K

Hi everybody,

Got the Crosley in a blonde cabinet in good shape. New old stock tubes in the set. I've adjusted the horizontal hold through the range but this crosshatch pattern won't lock up clear. Fuzzy focus is the camera. I've adjusted the linearity just a little with no difference. It has trimmers for horizontal frequency, drive and lock but I haven't touched them. Last time I had an issue like this, it was suggested the horizontal frequency was way off. What do you guys think???

BTW, I have an ImageShack account. How do I use it to embed photos in the post?

It does look like the horizontal frequency is way off but maybe rule out other things in the horizontal first.

[Chris K]

Here we go...let's see if this is a better view

[zeno]

Hoz freq is off a little. Try the tube 1st no matter what a checker say.
HINT if you adjust coils or caps FLAG the tool with a piece of tape
so you can return to the start. After that look at the caps & test resistors.
When fixed the customer H hold should be apx half range.

BTW this is VERY common after a recap. Set works- recap- H osc off.

73 Zeno
LFOD !

[Chris K]

I've tried tube changes several times. I checked all of the resistors in both the horizontal and vertical circuits and replaced the ones that were even close to being out of spec. The caps have all been replaced and I even pulled the mica caps and tested them. Most were OK but the ones off value and leaky were replaced with 1% mica caps of the same value. I don't think this is component based...it's adjustment based and I've been trying for days. Does anyone know where to start other than the horizontal hold control set to the middle? I have the Riders service manual that gives a great description as to what the drive and lock in the circuit do but there's no technique described as to how to start the process of dialing in the horizontal from jump. I followed the Sams description of oscillator and lock setup but to no avail.

[Chris K]

Originally Posted by zeno

Hoz freq is off a little. Try the tube 1st no matter what a checker say.
HINT if you adjust coils or caps FLAG the tool with a piece of tape
so you can return to the start. After that look at the caps & test resistors.
When fixed the customer H hold should be apx half range.

BTW this is VERY common after a recap. Set works- recap- H osc off.

73 Zeno
LFOD !

I’ll have to go through the horizontal circuit again and make sure I didn’t make a cap replacement mistake. I’ve been mostly checking and checking resistors. I should make sure I didn’t replace a 0.022 with a 0.0022 etc.

[jr_tech]

Originally Posted by Chris K

I’ll have to go through the horizontal circuit again and make sure I didn’t make a cap replacement mistake. I’ve been mostly checking and checking resistors. I should make sure I didn’t replace a 0.022 with a 0.0022 etc.

Did you power up the set on a variac or dim bulb before re-capping to observe the operation (if any) of the sweep circuits?

jr

[Chris K]

Originally Posted by jr_tech

Did you power up the set on a variac or dim bulb before re-capping to observe the operation (if any) of the sweep circuits?

jr

No I didn't. I should have after I replaced the electrolytics but I did not.

[bandersen]

Looks like you just need to tweak the hor freq trimmer. Nothing magical about it. Adjust until the picture locks.

[kvflyer]

Agree with the comments above. For example, I restored an RCA 630TS recently and the horizontal looked the same. There was evidence of work around the horizontal frequency transformer, called "Horizontal Frequency" on the rear apron. "Could it be that simple?" It was. apparently in the past, the transformer had been cranked way far away to compensate for a failing component (no doubt, a capacitor). Turning it slowly, the lines became less and less and voila, a stable picture. The procedure was to center the Horizontal Hold Control and then adjust the Horizontal Frequency for a stable picture.

So, I bet that is all that you need to do. Please, let us know!

[Chris K]

Been trying. One of the issues is the Crosley has a continuous induction tuner like the Dumont sets of the era so I can never tell if I’m exactly on the station. I’ve run the frequency trimmer all the way in and out. I know this is a question that will show the huge gaps in my experience but is there a frequency I can measure and shoot for? How much range does a typical trimmer have?

[bandersen]

15,750 Hz. Couldn't say how much range with your design.The trimmer is likely in parallel with a fixed cap. That cap might be too far off for the trimmer to compensate.

[Chris K]

Ok I’ll check the frequency and the cap

[timmy]

I have a cbs Columbia and recapped the whole set and was left with a horizontal problem where the screen would look like yours and can’t adjust it when it does this and I have yet to get back into it so I looked at the schematic and got all the micas and ceramic disc caps for when I get back in it I’m sure it’s one of these components and micas do go bad.