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#1
05-06-2010, 07:04 AM
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what bugged me was I had some NOS radio shack lifetime tubes (the 6gh8's) that seemed to cause the problem.
Now that I got a pic I will do a one at a time swap and see if its a particular tube. another issue vert centering off, there is a pot that is labled vert centering. I figure is just bias the yoke, but have not traced the wiring yet. I will need to get a schematic of this chassis. if its a bias then I need to see what the B+ that feeds it should be. Just for fun I will put the set on a variac, I have one that can handle the load. See what happens when changing the line voltage. I has the orig can caps, maybe a weak one in the B+ doubler (again I am assuming it uses a doubler, there are a couple diodes in the PS, guess it could be a centertaped PT and a full wave rectifier). This set does not use a HV regulater either, almost a muntz color tv (I wonder if muntz ever did color?). 
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#2
05-06-2010, 08:40 AM
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About that vertical centering...many times I would see it way off, as well as height and linearity being misadjusted. I believe most of us understand the relationship between the vertical pots and how the top or bottom of the raster moves with it, how they interact with each other.
What I'm getting at is take the normal-service switch and put in the service position and establish your center line. Can be tricky if the convergence is off though. Now you can adjust the other pots for a good, (more) centered and linear picture. B+, B+ Boost, and High Voltage can affect just about everything so good to check voltages...as you mentioned. These Old Philco's are fun!!
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#3
05-06-2010, 08:45 AM
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yes,muntz did color.we saw a scant few back in the day.muntz also was a pioneer in the big screen early projection sets.philco s are well known to have electrolytic problems.those cans leak like like a sieve.as in an earlier post,our families first color set was a philco ford roundie.pretty good set with a nice picture.much better than the higher level rca s in the store.good luck with yours
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#4
05-06-2010, 09:11 AM
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did the service switch, did not note the center position, will do later tonight.
in service even with brightness all the way down and the red drive all the way down I had a red line, could not make it just go away. The green and blue I was able to make just go away but since I was stuck with the red, I just adj the green and blue to the same approx brightness. after the above adj the overall brightness in the norm position seems about right and grey scale seems good. it did not converge either on the center line in the service postion. The pic looks fine in normal viewing. I will put a dot and cross hatch on it later to see how that shows up.
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#6
05-13-2010, 03:54 PM
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I cannot recall having these high voltage low mfd caps go bad, but guess it's possible. I have however seen the usual 50v 100mfd lytic go bad on RCA's. Not sure if this has similat charactristics or not.
__________________
Honey, turn on the tv.. I'm cold!
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#7
06-07-2010, 12:47 PM
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this is the one that I started the blue flashes thread, figured I would bring it back to the orig.
Got it in the office, rainbow starts up, swap a few 6GH8's in to th osc tube spot and that fixed that up. only thing left is the darn control panel door. I think I got a fix. I need to make the little pegs that hold it in wider, then file a flat on it is a way that makes it want to stay up. Pics coming later.
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#9
06-07-2010, 04:14 PM
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hmm says to use a high voltage prob and a vtvm. I only have a reg hv prob with the built in meter. this is to set the HV to 25.5kv
I wonder if the VTVM would load it less and therefore get a different reading than my HV prob with the built in meter. I assume this is pretty critical since it does not have any HV regulation built into the circuit.
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#10
06-08-2010, 10:47 AM
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Quote:
25.5 kV sounds like a case of too many decimal places to me.
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#12
06-18-2010, 02:30 PM
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yes, and I did not even touch up the convergence static or dynamic. only needed a couple new tubes, and I replaced a couple caps, but I don't think they really needed it, they just tested a bit less than like a brand new cap, and I had already taken them out of circuit to test. Has the orig can cap.
its a real plain jane, I found an add for it touting the low cost practical cabinet, I am sure they were going for the hard core color tv holdouts. Last edited by DaveWM; 06-18-2010 at 02:50 PM.
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#13
06-18-2010, 08:48 PM
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good looking pics!my family had one of those sets.sharp picture.dad bought it because it was a philco ford and spanky mcfarland was at the store promoting them.we watched hollywood palace and mannix the first night we got it.didnt work the next day,(6kd6 went south),but on monday it was working solid again.we got about 8 years out of it before it was retired for a d-16 sylvania with slide controls.the philco was sold to a neighbor and they watched it for years.i jolted the crt a few times in 10 or so years for them and had a cap go in the audio once.good set and glad to see your looking so well
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#15
06-20-2010, 03:00 AM
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It's interesting that you mentioned Mannix. I remember my first job, at a bowling alley in Chicago, a couple of years before I got interested in old TV sets. It was 1978, and my family had still never had a color TV set, so I knew little about them. I saw the TV on in the bowling alley's bar, and a Mannix rerun was starting, so I stopped and watched for a couple of minutes. It was a color TV. That was the first time I noticed-the picture tube was obviously ROUND! It just seemed weird.
 I still love the opening credits of that show.
__________________
Chris Quote from another forum: "(Antique TV collecting) always seemed to me to be a fringe hobby that only weirdos did."
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