philco 21" console to fix or not - Page 2 - Videokarma.org TV - Video

rcaman · #16 03-15-2014, 10:49 PM

well i have the high voltage back l36 on the flyback was burned open. this goes to the damper tube which i have swapped out. crt is plenty bright have some audio and a white raster. going to have to pull the chassis and take voltage measurements. would the 1n60 geraninum diode give me a slick raster if it were bad. thanks steve

Don Lindsly · #17 03-16-2014, 01:53 PM

Few Philco TVs had chassis-mounted CRTs for good reason. There was far less factory and service breakage and lighter to handle. The 1956 TV 440/444 had chassis mounted CRTs and were a nuisance to handle. After that, only portables came that way.

Most shops had test set ups so firing up a chassis in the shop was no problem and took up much less room.

Yes, a bad video detector can cause a raster with no sound, no picture. A simple ohm meter check will confirm a suspect.

Don

Tubejunke · #18 03-16-2014, 07:30 PM

So even then they knew that they had something going on performance wise. I guess different markets serve different purposes and it holds true today. The more basic you keep something; the less likely that there is something that is going to break. BUT if there were no "big spender" market that wants to be trendy and have all the bells and whistles, then there wouldn't have been much room for companies like Allen B. Dumont Laboratories to forge ahead and actually over-engineer a product for at least short term high performance. This market is not worried about ease of repair or even replacement.

Personally, I'm glad that at least long ago these market differences were more clearly defined. As fascinated as I may be by the elaborate circuitry of a working early Dumont set, I would rather fix up something like one of these mid 50s Philcos (NOT Predicta) with relative ease and still have what is practically the same caliber of conversation piece to the average person who doesn't remember a time without color, remote control covering every function, and satellite programming

dieseljeep · #19 03-16-2014, 08:11 PM

Quote:

Originally Posted by Don Lindsly

Few Philco TVs had chassis-mounted CRTs for good reason. There was far less factory and service breakage and lighter to handle. The 1956 TV 440/444 had chassis mounted CRTs and were a nuisance to handle. After that, only portables came that way.

Most shops had test set ups so firing up a chassis in the shop was no problem and took up much less room.

Yes, a bad video detector can cause a raster with no sound, no picture. A simple ohm meter check will confirm a suspect.

Don

I really don't remember a Philco, that the CRT, wasn't cabinet mounted. I just used to pull the yoke and use my test CRT.
The model in question, was the first to use the one piece chassis and full power transformer and 5U4.
Never was a big fan of the split chassis jobs, even though, I have one in my collection.

rcaman · #20 03-25-2014, 10:10 PM

ok i replaced the video detector diode with a nos zenith 103-23 all the micas in the horizontal and several off tolerence resistors. fired her up and was rewarded with this. it still needs a new on/off switch the vertical lin and height has dead spots in the controls. i think i have nos for all three. here is pictures. really nice and easy chassis to restore.

rcaman · #21 03-25-2014, 10:11 PM

next thing polish up the cabinet and front bezel. i am very happy with this philco.

Phil Nelson · #22 03-25-2014, 10:47 PM

Hey, another one back from the dead. Looks good!

Another advantage of mid-late 1950s consoles, besides easy restoration & good performance, is that you CAN watch them daily without chewing your fingernails over the possibility of burning up some priceless unobtanium part.

Phil Nelson
Phil's Old Radios
http://antiqueradio.org/index.html

Tubejunke · #23 03-25-2014, 11:00 PM

This is a good thread. It's neat that several people here have a Philco of this vintage and/or know a little about them. It's surely not a technical thread, but that's because the darned things don't ever stop once you have them in working order. I think they are phenomenal based on my experience with the two working 56s that I have owned. I do have a metal case table model that I will probably keep for parts and a couple of extra chassis.

If anyone needs a bail out on an unobtanium part, just drop me a line. I haven't needed a part other than a c.r.t. in about 32 years. Amazing!

Don Lindsly · #24 03-25-2014, 11:35 PM

[QUOTE] I really don't remember a Philco, that the CRT, wasn't cabinet mounted. I just used to pull the yoke and use my test CRT.
The model in question, was the first to use the one piece chassis and full power transformer and 5U4.
Never was a big fan of the split chassis jobs, even though, I have one in my collection. [QUOTE]

The 1956 Miss America TV 440/444 and the 7 inch 50-701/2 are the ones I recall. I may have missed one. That 440 was one of the few chassis that was not carried over to the following year.

Split chassis were over-engineered and had high manufacturing cost. The flat chassis (1955 on) was built in the new factory that closed in '75.

dieseljeep · #25 03-26-2014, 09:18 AM

[QUOTE=Don Lindsly;3099270][QUOTE] I really don't remember a Philco, that the CRT, wasn't cabinet mounted. I just used to pull the yoke and use my test CRT.
The model in question, was the first to use the one piece chassis and full power transformer and 5U4.
Never was a big fan of the split chassis jobs, even though, I have one in my collection.

Quote:

The 1956 Miss America TV 440/444 and the 7 inch 50-701/2 are the ones I recall. I may have missed one. That 440 was one of the few chassis that was not carried over to the following year.

Split chassis were over-engineered and had high manufacturing cost. The flat chassis (1955 on) was built in the new factory that closed in '75.

Now I remember that big, heavy beast. IIRC, it was a 24". It was an upright chassis, like the Admirals of the day.

rcaman · #26 03-26-2014, 10:32 AM

one more question. the focus magnet how much focus or should i say how sharp can i get the picture on this philco. the focus magnet is froze tight im going to put a little liquid wrench on it and let it soak. the set does have a good picture by the way. steve

Don Lindsly · #27 03-26-2014, 03:38 PM

RCA Man:

With a good picture tube, it will produce a sharp focus with scanning lines clearly visible across the entire screen. As the CRT and/or focus magnets degrade, some degradation will be noticed.

rcaman · #28 03-26-2014, 05:42 PM

thanks again don

rcaman · #29 03-26-2014, 05:44 PM

the crt is a ge replacement date code 6543-30 seems it was an all new tube..
steve

Tubejunke · #30 03-26-2014, 07:59 PM

Is the C.R.T. a 21ZP4 or a 21YP4? For some reason they used both in or around 56. My "keeper" has the 21ZP4 and all my parts are 21YP4s. I hope someone knows why they did this. The problem that it presents is that you have two identical sets for all practical purposes, but the tubes can't be swapped directly.

The difference from what I have heard and seen is the method of focus, but again the sets are identical. Does anyone have a U.H.F. set?