Need help-Bendix tv

[Bill Cahill]

Hi, Guys. I need help on my 10" console Bendix tv.
I have the set playing, but, it has terrible retrace lines..
Can someone draw me a schematic with approx. values of what I need?
Video Out. is a 6AU6.
Vert. Osc., out. is a 6SN7.
Pix. tube standard 10BP4.
No damper in this set.
Uses 6SN7 as sync sep.
6BQ6 horiz. osc., horiz. amp.
Thanks, guys.
Bill Cahill

[6GH8cowboy]

My assumption is there is not a blanking ckt in it. Being this is a experimental endeavor I would suggest just taking a couple of jumper clips and a .01 cap to the CRT grid from the vertical out tube/ transformer and go from there and experiment with the values. (As long as the cathode feed for video).

[cbenham]

Originally Posted by Bill Cahill

Hi, Guys. I need help on my 10" console Bendix tv.
I have the set playing, but, it has terrible retrace lines..
Can someone draw me a schematic with approx. values of what I need?
Video Out. is a 6AU6.
Vert. Osc., out. is a 6SN7.
Pix. tube standard 10BP4.
No damper in this set.
Uses 6SN7 as sync sep.
6BQ6 horiz. osc., horiz. amp.
Thanks, guys.
Bill Cahill

What is the model number? ??403?? Do you have a SAMS for it?

Cliff

[David Roper]

It's a Muntz clone. My Muntz had a mod added to it that very effectively killed the retrace, but it also eliminated DC restoration so I undid it. I only wish the DC resto worked as well as the retrace mod, but a little is better than none. Besides, on my set anyway, the lines are really only evident when video content goes quite dark.

[nasadowsk]

Wait - no damper? How does *that* work?

[Bill Cahill]

Sorry I'm late guys. But, here is the infor.
First, it's in Sam's 84-4.
The set there is the table model version. I also have that one, and, it's the exact same chassis.
That model is 2001.
Mine is the console version.
Both 10".

It does not use a damper tube. I t technically has a damper.. It's a damper capacitor. It's connected to it's own winding on the flyback.
Other end of both go to chassis.
Value of cap... .004

The 6SN7 in the cage is Horizontal phase inverter-horizontal phase detecctor.
6BQ6 is Horizontal oscilator, and, horizontal output.
last tube is 1B3 hv rect.
Other 6SN7 is vertical osc.-vert. amp.
Uses a 5V4 lv rectifier for B+.
Set appears to have no boost supply, but, has high B+ of 410 volts on rectifier.
One of my pictures shows the .004 damper cap going from a terminal strip to chassis.
This set has a floating horizontal oscilatr that depends solely on the detector, and, sync to determine the frequency.
No coils at all.
Not sure, but, I think it may have keyed agc, but, has no dc restorer.
It is a very cheaply made set that I think Muntz could have taken lessons from. Muntz had a damper tube. Not this set. Muntz had a seperate horizontal osc. Not this set.
Muntz should have studied Bendix. Not RCa.

Entire audio circuit is 250 volts above chassis, which is B-.
They put a 100 ohm 10Watt resistor between the center tap winding of power transformer, and, Chassis.
Audio is direct coupled from the plate of the 6T8 to the control grid of 6AQ5 aud. out.
Notce a lack of caps in this set. They used as few as they could get by with.

Please see schematic. Can anyone post a sam's on this for me? I have no way of doing it.
Thanks.
Bill Cahill

[David Roper]

It's a clone of the Muntz 159 chassis, the only differences are where Bendix out-Muntzed Muntz, the elimination of the coupling cap to the 6AQ5 a prime example. From Rider:

The DC [from the sync limiter tube] is applied to the picture tube grid simultaneously with the video signal on the cathode. The grid-cathode voltage will maintain black level for a wide range of signals.

In other words--DC restoration. The retrace mod done to my set removed that connection so I put it back.

[David Roper]

There, don't say I never did nuffin for ya. Sorry, I don't remember the value of the resistor. In the pic I took it appears to have an orange third band.

[dieseljeep]

I remember seing in Rider's, that Muntz made a 10" set that didn't use a damper tube. I never saw too many Bendix products in Milwaukee. Their radios were common.
IIRC, Schuster's was the only dealer that sold them.

[Bill Cahill]

Was that the company owned by two young men from a family that moved to the U. S. a decade earlier? True story. Not fake.
I saw the move about them some years ago.
They had an appliance store, and, decided to sell tv's.
There was a console Bendix in the showroom window, exactly the same model as mine.
It had just as lousy a picture as mine.
The place burned down shortly after starting to sell tv's.
They had no insurance, and, went out of business.
Bill Cahill

[Jeffhs]

How well does that Bendix TV work with a DTV converter box, or are you still getting OTA analog TV from LPTV (low-power TV) stations in the Tampa/St. Pete area? I'm wondering because I read somewhere (maybe here) that older TVs don't work well with UHF converters (back in the NTSC analog days) or today's DTV boxes, or even digital cable boxes. I read that some older sets don't work well with the sync signals from the RF modulators in cable boxes, and some very old sets operate very poorly (if they work at all) with VCRs.

[cbenham]

Originally Posted by Bill Cahill

Can anyone post a sam's on this for me? I have no way of doing it. Thanks. Bill Cahill

The 2001 schematic is attached. As for adding a vertical blanking pulse to the
first grid of the CRT, I would add a 22K 1/2 watt resistor in series between the yellow wire and the capacitor because I don't know if these old CRTs can withstand that 60 to 80 volt vertical pulse and not develop an G-K short.

Another way would be to send the pulse from the yellow wire through the resistor and the cap to the second grid. You might need to add a second 22K resistor in series with the B+ source that is connected directly to this grid.

Best luck with this set!

Cliff

[David Roper]

Originally Posted by cbenham

You might need to add a second 22K resistor in series with the B+ source that is connected directly to this grid.

I see G1 of the CRT connected to the cathode of V7, not to any B+ source.

[dieseljeep]

Originally Posted by Bill Cahill

Was that the company owned by two young men from a family that moved to the U. S. a decade earlier? True story. Not fake.
I saw the move about them some years ago.
They had an appliance store, and, decided to sell tv's.
There was a console Bendix in the showroom window, exactly the same model as mine.
It had just as lousy a picture as mine.
The place burned down shortly after starting to sell tv's.
They had no insurance, and, went out of business.
Bill Cahill

Bill! If you're refering to the Milwaukee, Schuster's store, that wasn't the one refered to in the movie. Schusters was sold to Gimbel Bros in 1960. They were part of the Affiliated Retailers chain and their private label products were Arlington and Artone. Most Arlingtons were Wells-Gardner, where Artone was the lower end line. The Artones were Olympic and Tele-King Built.
It was noted in one of the mid-thirties Radio Retailing mags, that Schuster's had the largest radio department in the entire mid west.
Regarding the movie, it was enjoyable enough, but the products that were pictured, didn't agree with time line of the story. Some were too new or too old.

[Bill Cahill]

Thanks. I admit, the scense were so fast, I didn't get to see all the tv's.
But, the Bendix, and, a locomotive GE sure were there.
What was the name of that movie? Was it Avolon?
I just can't remember, but, gave an interesting history on the family.
Bill Cahill
And, even though mistakes were made, yes, it was still interesting seeing the appliances, and, all the neat tv's.
I will admit the tv supposedly used in their own home, a 10" wood console Admiral, the wrong knobs were being fiddled with to adjust it, change channels, and, turn it off, plus he carried that baby in like it was a sack of groceries. He. Sure came to life mighty fast when he turned it on...........
But, I think at least a number of the store sets, including the Bendix, were really playing.